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Sand-carrying thresholds of viscous slickwater:Weissenberg number-based prediction and field application 认领 引用 被引量：1
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作者 Junlin Wu TianBo Liang +4 位作者 Bin Wang Leyi Zheng Hao Bai Fangzhou Xu FuJian Zhou 《Natural Gas Industry B》 2026年第2期192-205,共14页
The complex viscoelastic and shear-thinning behavior of slickwater fracturing fluids imposes competing effects on proppant transport,complicating the prediction of sand-carrying capacity and increasing the sand pluggi... The complex viscoelastic and shear-thinning behavior of slickwater fracturing fluids imposes competing effects on proppant transport,complicating the prediction of sand-carrying capacity and increasing the sand plugging risk.This study quantifies slickwater elasticity over a range of shear rates using the Weissenberg number(Wi)and establishes a fracture-scale shear-rate calculation method to estimate elastic energy at different flow velocities.The results show that:(1)the Wi strongly correlates with sand-carrying capacity,demonstrating its effectiveness in characterizing elastic-dominated transport behavior;(2)fracture experiment identify distinct settling-rate thresholds for slickwater systems with different polymer concentrations;(3)at these thresholds,fluids transporting equivalent proppant volumes exhibit identical elastic energies,indicating a the existence of a critical elastic-energy requirement for stable proppant suspension;(4)elastic-energy thresholds are established for three sand concentrations,allowing rapid prediction of sand-carrying capacity across slickwater systems with different viscosities;and(5)a field construction strategy derived from the predicted operating window is validated through field trials conducted both within and outside this window,with close agreement observed between the predicted and actual proppant-transport performance.This study provides a quantitative and practical framework for optimizing slickwater fracturing operations. 展开更多
关键词 Sand-carrying threshold Weissenberg number Viscoelastic fluid Field application
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Attractant Development and Field Application Evaluation for Tomicus minor 认领 引用
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作者 ZHAO Genying FENG Dan +3 位作者 LI Haoran CHEN Peng WANG Meiying ZHANG Junzhong 《西部林业科学》 CAS 北大核心 2026年第2期129-136,共8页
Tomicus minor is a major pest of Pinus yunnanensis and other pine species,causing severe damage that is difficult to control.Developing effective management tools is therefore of significant importance.In this study,t... Tomicus minor is a major pest of Pinus yunnanensis and other pine species,causing severe damage that is difficult to control.Developing effective management tools is therefore of significant importance.In this study,ten volatile compounds derived from host plants and insect bodies were screened using headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry(HS-SPME-GC-MS).Their attraction effects on T.minor were evaluated through behavioral bioassays.The results showed that 500 mg·mL-1(+)-3-carene was the most attractive single compound,with an attraction rate of 48.33%.Additionally,50 mg·mL-1of 4,6,6-trimethylbicyclo[3.1.1]hept-3-en-2-ol also exhibited strong attraction.An optimal binary blend of these two compounds achieved a high indoor attraction rate of 53.33%.Experiments simulating forest conditions to evaluate the effects of trap placement height and stand canopy density on trapping efficacy revealed that traps deployed in stands with very low canopy density yielded the best results. 展开更多
关键词 Tomicus minor SPME-GC-MS semiochemicals simulated field application green biotechnology Pinus yunnanensis
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Review of the development and application of high flux reactors 认领 引用
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作者 Jian Li Wei Xu +3 位作者 Ding She Heng Xie Zhi-Hong Liu Lei Shi 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2025年第11期45-68,共24页
High flux reactors(HFRs)are a special type of research reactor aimed at providing a high neutron flux.Compared with power reactors and other research reactors,HFRs have unique technical features in terms of reactor co... High flux reactors(HFRs)are a special type of research reactor aimed at providing a high neutron flux.Compared with power reactors and other research reactors,HFRs have unique technical features in terms of reactor core design,irradiation capability,and operating characteristics.They can be applied to the irradiation tests of nuclear fuels and materials,radioisotope production,neutron science,and experiments.This paper reviews HFRs,including their development history,technical features,and application areas,as well as trends in the development of new and advanced HFRs. 展开更多
关键词 High flux reactor Development Design features Application fields Review
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Drilling-based measuring method for the c-φ parameter of rock and its field application 认领 引用 被引量：13
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作者 Bei Jiang Fenglin Ma +5 位作者 Qi Wang Hongke Gao Dahu Zhai Yusong Deng Chuanjie Xu Liangdi Yao 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第1期65-76,共12页
The technology of drilling tests makes it possible to obtain the strength parameter of rock accurately in situ. In this paper, a new rock cutting analysis model that considers the influence of the rock crushing zone(R... The technology of drilling tests makes it possible to obtain the strength parameter of rock accurately in situ. In this paper, a new rock cutting analysis model that considers the influence of the rock crushing zone(RCZ) is built. The formula for an ultimate cutting force is established based on the limit equilibrium principle. The relationship between digital drilling parameters(DDP) and the c-φ parameter(DDP-cφ formula, where c refers to the cohesion and φ refers to the internal friction angle) is derived, and the response of drilling parameters and cutting ratio to the strength parameters is analyzed. The drillingbased measuring method for the c-φ parameter of rock is constructed. The laboratory verification test is then completed, and the difference in results between the drilling test and the compression test is less than 6%. On this basis, in-situ rock drilling tests in a traffic tunnel and a coal mine roadway are carried out, and the strength parameters of the surrounding rock are effectively tested. The average difference ratio of the results is less than 11%, which verifies the effectiveness of the proposed method for obtaining the strength parameters based on digital drilling. This study provides methodological support for field testing of rock strength parameters. 展开更多
关键词 Digital drilling Rock crushing zone c-u parameter Measurement method Field application
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Numerical simulation and field application of diverting acid acidizing in the Lower Cambrian Longwangmiao Fm gas reservoirs in the Sichuan Basin 认领 引用 被引量：2
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作者 Yue Hong Liu Fei +3 位作者 Xue Heng Sang Yu Zhou Changlin Wang Yezhong 《Natural Gas Industry B》 2018年第3期204-211,共8页
The Lower Cambrian Longwangmiao dolomite gas reservoirs in the Sichuan Basin are characterized by well-developed natural micro-fractures and dissolved pores and cavities.Due to the strong heterogeneity of reservoirs a... The Lower Cambrian Longwangmiao dolomite gas reservoirs in the Sichuan Basin are characterized by well-developed natural micro-fractures and dissolved pores and cavities.Due to the strong heterogeneity of reservoirs and the serious damage of drilling and completion fluids,acid placement is difficult,and especially the acidizing stimulation of long-interval highly deviated wells or horizontal wells is more difficult.In this paper,the diverting mechanism and rheological behavior of viscoelastic surfactant(VES)based diverting acid was firstly investigated,and the diverting acid with good diversion performance and low secondary damage was selected as the main acid.Then,based on the experimental results of its rheological behaviors,an empirical model of effective viscosity was fitted and a two-scale wormhole propagation model was coupled.And accordingly,a mathematical model for the acidizing of self-diverting acid was established to simulate the pH value,Ca2+concentration,effective viscosity and wormhole shape under the effect of diverting acid in long-interval highly deviated wells that are non-uniformly damaged.Finally,gelled acid and 5%VES diverting acid were compared in terms of their etched wormhole shapes,flow rate dis-tribution and acid imbibition profiles.It is shown that the diverting acid can obviously improve the acid imbibition profile of strong-heterogeneity reservoirs to intensify low-permeability reservoir stimulation.In view of the strong heterogeneity of Longwangmiao dolomite reservoirs and the complexities of drilling and completion fluid damage in the Sichuan Basin,a placement technology was developed for variable VES concentration diverting acid in horizontal wells and long-interval highly deviated wells completed with slotted liners.This acid placement technology has been practically applied in 8 wells and their cumulative gas production rate tested at the wellhead is 1233.46×104m3/d.The average production stimulation ratio per well is up to 1.95.It provides a support for the efficient development of the Longwangmiao giant gas reservoir. 展开更多
关键词 Sichuan Basin Early Cambrian Longwangmiao Fm gas reservoir Dolomite Diverting acid Rheological behavior Matrix acidizing Numerical simulation Field application Highly-efficient developmen
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Preparation and Field Application of a Novel Micro-emulsion as Heavy Oil Displacement Agent 认领 引用 被引量：1
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作者 Qin Bing Qiao Fulin Li Caifu 《China Petroleum Processing & Petrochemical Technology》 CAS 2020年第3期19-27,共9页
A novel micro-emulsion was prepared by mixing an oil-soluble viscosity reducer,which was screened to aim at improving the heavy oil properties of Shengli oilfield with water-soluble surfactant and co-surfactant.The st... A novel micro-emulsion was prepared by mixing an oil-soluble viscosity reducer,which was screened to aim at improving the heavy oil properties of Shengli oilfield with water-soluble surfactant and co-surfactant.The static viscosity reduction and oil washing performance of the micro-emulsion were investigated,and the field application of the microemulsion used as heavy oil displacement agent was also reported.Results showed that the micro-emulsion exhibited excellent viscosity reduction performance for the studied heavy oil samples.When heavy oil was mixed with 0.5%of the micro-emulsion,a stable oil-in-water heavy oil emulsion could be formed.After the content of the micro-emulsion was increased to 3.0%,the oil removing rate reached up to 80%.Field application of the micro-emulsion to the Pai-601-Ping-115 well and the Pai-601-Ping-123 well was shown to be effective by increasing the periodic oil production up to 203 tons. 展开更多
关键词 micro-emulsion heavy oil displacement agent field application
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Improved methods,properties,applications and prospects of microbial induced carbonate precipitation(MICP)treated soil:A review 认领 引用 被引量：10
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作者 Xuanshuo Zhang Hongyu Wang +3 位作者 Ya Wang Jinghui Wang Jing Cao Gang Zhang 《Biogeotechnics》 2025年第1期34-54,共21页
Soil improvement is one of the most important issues in geotechnical engineering practice.The wide application of traditional improvement techniques(cement/chemical materials)are limited due to damage ecological en-vi... Soil improvement is one of the most important issues in geotechnical engineering practice.The wide application of traditional improvement techniques(cement/chemical materials)are limited due to damage ecological en-vironment and intensify carbon emissions.However,the use of microbially induced calcium carbonate pre-cipitation(MICP)to obtain bio-cement is a novel technique with the potential to induce soil stability,providing a low-carbon,environment-friendly,and sustainable integrated solution for some geotechnical engineering pro-blems in the environment.This paper presents a comprehensive review of the latest progress in soil improvement based on the MICP strategy.It systematically summarizes and overviews the mineralization mechanism,influ-encing factors,improved methods,engineering characteristics,and current field application status of the MICP.Additionally,it also explores the limitations and correspondingly proposes prospective applications via the MICP approach for soil improvement.This review indicates that the utilization of different environmental calcium-based wastes in MICP and combination of materials and MICP are conducive to meeting engineering and market demand.Furthermore,we recommend and encourage global collaborative study and practice with a view to commercializing MICP technique in the future.The current review purports to provide insights for engineers and interdisciplinary researchers,and guidance for future engineering applications. 展开更多
关键词 Soil improvement Bio-cement MICP Improved methods Field application cases
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New Method for 3D Transient Eddy Current Field Calculation and Its Application in Magneto-Acoustic Tomography 认领 引用 被引量：3
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作者 李元园 刘国强 +1 位作者 夏慧 胡丽丽 《Chinese Physics Letters》 SCIE EI CAS CSCD 2017年第11期75-79,共5页
A new method of 3D transient eddy current field calculation is proposed. The Maxwell equations with time component elimination （METCE） are derived under the assumption of magnetic quasi static approximation, especia... A new method of 3D transient eddy current field calculation is proposed. The Maxwell equations with time component elimination （METCE） are derived under the assumption of magnetic quasi static approximation, especially for the sample of low conductivity. Based on METCE, we deduce a more efficient reconstruction algorithm of a 3D transient eddy current field. The computational burden is greatly reduced through the new algorithm, and the computational efficiency is improved. This new algorithm decompounds the space-time variables into two individual variables. The idea is to solve the spatial vector component firstly, and then multiply it by the corresponded time component. The iterative methods based on METCE are introduced to recover the distribution of conductivity in magneto-acoustic tomography. The reconstructed images of conductivity are consistent with the original distribution, which validate the new method. 展开更多
关键词 New Method for 3D Transient Eddy Current Field Calculation and Its Application in Magneto-Acoustic Tomography
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A quantitative fracability evaluation method and its application to deep shale gas development in Sichuan Basin,China 认领 引用 被引量：1
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作者 Guokai Zhao Yintong Guo +5 位作者 Chunhe Yang Mingyang Wu Junchuan Gui Shilong Teng Lei Wang Xinao Zhang 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2025年第9期1477-1492,共16页
Fracability evaluation is critical for efficiently extracting deep shale gas using hydraulic fracturing to avoid blind drilling and fracking.However,existing fracability indices often fail to systematically consider t... Fracability evaluation is critical for efficiently extracting deep shale gas using hydraulic fracturing to avoid blind drilling and fracking.However,existing fracability indices often fail to systematically consider the mechanical behavior of rocks at high temperatures and high pressures(HTHP),coupled with geostress distributions and heterogeneous reservoir characteristics.This critical omission limits their effectiveness in accurately identifying the optimal fracability sweet spots within deep reservoirs.In this work,a fracability evaluation model was proposed based on the combined weighting method,integrating the improved brittleness index,rock strength,geostresses and natural weakness characteristics.A fracability grading evaluation was carried out to determine the potential fracture characteristics corresponding to shales with different fracability levels.Additionally,the fracability index was used for field validation and applications.Results show that rock brittleness and fracability are not equivalent for deep reservoirs.The fracability index is closely related to the pay zones and actual gas production,with a correlation as high as 84%,implying that the proposed method has practical significance in both experimental and field applications.The above findings can provide theoretical guidance for the selection of fracturing candidates and the optimal design of fracturing in deep resource development. 展开更多
关键词 Fracability Energy-based brittleness Wufeng-Longmaxi formation Field application
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Screening and field application of microbial-flooding activator systems 认领 引用
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作者 Xiutian Yao Lipeng Gai +6 位作者 Yun Feng Runlin Zhao Yang Gao Yucui Zhang Chuanzhi Cui Jun Ma Zhongwei Wu 《Energy Geoscience》 EI 2024年第2期14-20,共7页
This study aims to further enhance the oil recovery of reservoirs in the Zhong-2 Block of the Gudao Oilfield by identifying the most effective microbial-flooding activator systems and applying them in the field.We beg... This study aims to further enhance the oil recovery of reservoirs in the Zhong-2 Block of the Gudao Oilfield by identifying the most effective microbial-flooding activator systems and applying them in the field.We began by analyzing the structure of the reservoirs'endogenous microbial communities to understand the potential impact of microbial flooding.This was followed by determining commonly used activator systems based on their abilities to stimulate oil-displacement functional bacteria.Through laboratory experiments on oil displacement efficiency and sweep characteristics,we determined the optimal activator injection method(injection ratio)and the requisite bacterial concentration for maximal microbial-flooding efficacy.Finally,we selected the optimal activator systems and applied them to field tests.Our findings suggest the target block is highly receptive to microbial-flooding.In terms of performance,the activator systems ranked as No.3>No.4>No.1>No.2.Interestingly,a deep activator system,when compared to the top-performing No.3 system,exhibited a higher bacterial concentration peak and longer peaking duration.Optimal oil displacement effects were observed at a 1:4 vol ratio between the No.3 activator and deep activator systems,with bacterial concentrations of up to 106 cells/mL or above.Field tests with the selected activator systems,following a specific injection protocol,demonstrated a notable increase in oil production and a reduction in water cut. 展开更多
关键词 Zhong-2 Block of Gudao Oilfield Microbial flooding Laboratory experiment Screening of activator system Field application
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Bearing characteristics of anchor box beam support system in deep thick roof coal roadway and its application 认领 引用
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作者 WANG Qi WANG Ming-zi +1 位作者 JIANG Bei XU Chuan-jie 《Journal of Central South University》 SCIE EI CAS CSCD 2025年第5期1887-1902,共16页
Considering the characteristics of deep thick top coal roadway,in which the high ground stress,coal seam with low strength,and a large range of surrounding rock fragmentation,the pressure relief anchor box beam suppor... Considering the characteristics of deep thick top coal roadway,in which the high ground stress,coal seam with low strength,and a large range of surrounding rock fragmentation,the pressure relief anchor box beam support system with high strength is developed.The high-strength bearing characteristics and coupling yielding support mechanism of this support system are studied by the mechanical tests of composite members and the combined support system.The test results show that under the coupling effect of support members,the peak stress of the box-shaped support beam in the anchor box beam is reduced by 21.9%,and the average deformation is increased by 135.0%.The ultimate bending bearing capacity of the box-shaped support beam is 3.5 times that of traditional channel beam.The effective compressive stress zone applied by the high prestressed cable is expanded by 26.4%.On this basis,the field support comparison test by the anchor channel beam,the anchor I-shaped beam and the anchor box beam are carried out.Compared with those of the previous two,the surrounding rock convergence of the latter is decreased by 41.2%and 22.2%,respectively.The field test verifies the effectiveness of the anchor box beam support system. 展开更多
关键词 thick roof coal roadway anchor box beam bearing characteristics combined support field application
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Application Research of Wireless Sensor Networks and the Internet of Things 认领 引用 被引量：1
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作者 Changjian Lv Rui Wang Man Zhao 《Journal of Electronic Research and Application》 2025年第4期283-289,共7页
In the context of the rapid iteration of information technology,the Internet of Things(IoT)has established itself as a pivotal hub connecting the digital world and the physical world.Wireless Sensor Networks(WSNs),dee... In the context of the rapid iteration of information technology,the Internet of Things(IoT)has established itself as a pivotal hub connecting the digital world and the physical world.Wireless Sensor Networks(WSNs),deeply embedded in the perception layer architecture of the IoT,play a crucial role as“tactile nerve endings.”A vast number of micro sensor nodes are widely distributed in monitoring areas according to preset deployment strategies,continuously and accurately perceiving and collecting real-time data on environmental parameters such as temperature,humidity,light intensity,air pressure,and pollutant concentration.These data are transmitted to the IoT cloud platform through stable and reliable communication links,forming a massive and detailed basic data resource pool.By using cutting-edge big data processing algorithms,machine learning models,and artificial intelligence analysis tools,in-depth mining and intelligent analysis of these multi-source heterogeneous data are conducted to generate high-value-added decision-making bases.This precisely empowers multiple fields,including agriculture,medical and health care,smart home,environmental science,and industrial manufacturing,driving intelligent transformation and catalyzing society to move towards a new stage of high-quality development.This paper comprehensively analyzes the technical cores of the IoT and WSNs,systematically sorts out the advanced key technologies of WSNs and the evolution of their strategic significance in the IoT system,deeply explores the innovative application scenarios and practical effects of the two in specific vertical fields,and looks forward to the technological evolution trends.It provides a detailed and highly practical guiding reference for researchers,technical engineers,and industrial decision-makers. 展开更多
关键词 Wireless Sensor Networks Internet of Things Key technologies Application fields
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A three-dimentional model of the northeast East China Sea, with application to the M2 current field 认领 引用 被引量：1
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作者 Tang Yuxiang First Institute of Oceanography, State Oceanic Administration, Qingdao, China 《Acta Oceanologica Sinica》 SCIE CAS 1990年第4期487-498,共12页
A simple three-dimensional tidal model is used to examine the M2 tidal current distribution in a northeastern part of the East China Sea, especially the vertical variation of the current in the region. Computed M2 cur... A simple three-dimensional tidal model is used to examine the M2 tidal current distribution in a northeastern part of the East China Sea, especially the vertical variation of the current in the region. Computed M2 current is compared with observations available and found to be in good agreement.Main features of the calculating method in this study are: (1) Vertical variation of the tidal current is taken as a funetion of the depth-mean velocity: (2) the method is applicable to a variety of the vertical eddy viscosities; (3) it has a fine vertical resolution, especially near the sea bootom. So, this method not only enables us to get a steady state solution easily but also depicts effects of the friction on the vertical variation of the current much better. 展开更多
关键词 with application to the M2 current field A three-dimentional model of the northeast East China Sea
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Application of Low Pressure Plasma Technology in the Field of Environmental Protection 认领 引用 被引量：1
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作者 孙亚兵 李敏 《Plasma Science and Technology》 SCIE CAS 2000年第2期187-194,共8页
The characteristics of low pressure plasma produced by a gas discharges lie in thatthe energy of the electrons are much higher than that of the heavy particles in the system. Inthis paperl the low-pressure plasma trea... The characteristics of low pressure plasma produced by a gas discharges lie in thatthe energy of the electrons are much higher than that of the heavy particles in the system. Inthis paperl the low-pressure plasma treatment technology for the environmental contaminantswas synthetically studied, and the reaction processing and mechanism between the low-pressureplasma and the environmental contaminants were theoretically analyzed. At last, the prospectsand existing problems on the application of low-pressure plasma in the field of environmentalprotection were discussed. 展开更多
关键词 SPM Application of Low Pressure Plasma Technology in the Field of Environmental Protection
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A dual attention-based deep learning model for lithology identificationwhile drilling 认领 引用 被引量：3
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作者 Jie Chen Zhen Gui +6 位作者 Yichao Rui Xusheng Zhao Xiaokang Pan Qingfeng Wang Yuanyuan Pu Zheng Li Maoyi Liu 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第2期1177-1192,共16页
Lithology identificationwhile drilling technology can obtain rock information in real-time.However,traditional lithology identificationmodels often face limitations in feature extraction and adaptability to complex ge... Lithology identificationwhile drilling technology can obtain rock information in real-time.However,traditional lithology identificationmodels often face limitations in feature extraction and adaptability to complex geological conditions,limiting their accuracy in challenging environments.To address these challenges,a deep learning model for lithology identificationwhile drilling is proposed.The proposed model introduces a dual attention mechanism in the long short-term memory(LSTM)network,effectively enhancing the ability to capture spatial and channel dimension information.Subsequently,the crayfishoptimization algorithm(COA)is applied to optimize the model network structure,thereby enhancing its lithology identificationcapability.Laboratory test results demonstrate that the proposed model achieves 97.15%accuracy on the testing set,significantlyoutperforming the traditional support vector machine(SVM)method(81.77%).Field tests under actual drilling conditions demonstrate an average accuracy of 91.96%for the proposed model,representing a 14.31%improvement over the LSTM model alone.The proposed model demonstrates robust adaptability and generalization ability across diverse operational scenarios.This research offers reliable technical support for lithology identification while drilling. 展开更多
关键词 Lithology identificationwhile drilling Deep learning Dual attention mechanism Metaheuristic algorithm Field applications
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A mini-review of MXene porous films:Preparation,mechanism and application 认领 引用 被引量：31
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作者 Yali Zhang Yi Yan +3 位作者 Hua Qiu Zhonglei Ma Kunpeng Ruan Junwei Gu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第8期42-49,共8页
MXene presents excellent electrical conductivity,abundant surface functional groups and wonderful filmforming performance,but the lamellar layers are prone to self-stacking during film formation,which will reduce the ... MXene presents excellent electrical conductivity,abundant surface functional groups and wonderful filmforming performance,but the lamellar layers are prone to self-stacking during film formation,which will reduce the loss of electromagnetic waves,hinder ion transmission,and limit the effective load of other functional materials.The construction of the porous structure can effectively solve the self-stacking problem of MXene sheets.This article reviews the research progress of MXene porous films for electromagnetic interference(EMI)shielding,lithium/sodium ion batteries,pseudocapacitors,and biomedical science applications.It focuses on the preparation methods of MXene porous films,and discusses the pore-forming mechanism of the porous structure formed by different preparation methods and the internal relationship between the“microstructure-macroscopic performance”of the MXene porous films,points out the key scientific and technical bottlenecks that need to be solved urgently in the preparation and application of the MXene porous films.It is hoped to provide certain guidance for the design,preparation,optimization,industrial application,and development of MXene porous films. 展开更多
关键词 MXene porous films Preparation method Pore formation mechanism Application fields
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Research on compound plugging removal technology and its application in Xinmu oilfield of Jilin 认领 引用
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作者 WANG Xianfeng MO Xiuwen 《Global Geology》 2012年第3期252-256,共5页
Most fault-block reservoirs in Xinmu oilfield belong to heterogeneous sandstone in characters which has low permeability, and reservoir pollution is a common phenomenon in this area. Acidizing deplugging in oil wells ... Most fault-block reservoirs in Xinmu oilfield belong to heterogeneous sandstone in characters which has low permeability, and reservoir pollution is a common phenomenon in this area. Acidizing deplugging in oil wells has become one of the major measures to improve production efficiency in the field. A compound deplug- ging technology in high efficiency low corrosion is developed for this kind of low permeability sandstone reser- voir. On the basis of profoundly understanding of the reservoir＇s physical properties and sensitivity, along with comprehensive analysis of the cause for jams in oil wells, a series of experiments are carried out in order to in- vestigate the dissolution reaction among samples and deplugging inhibitor, sample dissolving speed, formation fluid compatibility, reduction of secondary pollution, etc. Considered reservoir condition in nearby wells the op- timized compositional deplugging liquid formula is selected for this reservoir. It is featured by reducing the de- plugging reaction speed, extending solution for processing radius, preventing secondary damage in dissolution processing, and removing plug pollution effectively. To implement this high efficiency low corrosion deplugging measure based on reservoir condition in the borehole and nearby wells, a relatively better result of deplugging and production increasing is achieved, which enriches the measures to increase production in Xinmu oilfield, and this method can be applied to other similar oiffields for the purpose of maintaining the crude oil production and providing assistant for increasing the production significantly. 展开更多
关键词 compound plugging removal technology performance evaluation field application Xinmu oilfield
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Application of Fields for Adopted Standards in Catalogues of Chinese Standards 认领 引用
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作者 Lu Hong 《China Standardization》 2004年第5期9-9,共1页
关键词 Application of Fields for Adopted Standards in Catalogues of Chinese Standards
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Theories,technologies,and future prospects of distributed fiber-optic strain monitoring for hydraulic fracturing 认领 引用
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作者 Tiankui Guo Zunpeng Hu +5 位作者 Ming Chen Yongzan Liu Yuanhang Zhang Linrui Xue Guchang Zhang Yi Zhang 《International Journal of Coal Science & Technology》 SCIE EI CAS CSCD 2026年第2期36-62,共27页
Distributed strain sensing(DSS),benefiting from its high sensitivity,high spatial resolution,real-time capability,and continuous distributed measurement,has become an important technique for hydraulic fracturing diagn... Distributed strain sensing(DSS),benefiting from its high sensitivity,high spatial resolution,real-time capability,and continuous distributed measurement,has become an important technique for hydraulic fracturing diagnostics.To provide a comprehensive understanding of recent advances in DSS for hydraulic fracturing monitoring,this paper reviews three representative DSS technologies,namely low-frequency distributed acoustic sensing(LF-DAS),rayleigh frequency-shift distributed strain sensing(RFS-DSS),and optical frequency domain reflectometry-distributed strain sensing(OFDR-DSS),with respect to their sensing principles,downhole fiber-deployment methods,field applications in hydraulic fracturing,and associated diagnostic theories,and further outlines key directions for future development.The review indicates that:(1)LF-DAS,based on interferometric detection of coherent Rayleigh-scattering phase variations,is primarily sensitive to far-field strain-rate perturbations in offset wells and is therefore well suited for monitoring fracture hits,fracture propagation,and inter-well interference.RFS-DSS,which relies on coherent Rayleigh-scattering spectral-shift interrogation,is designed for high-resolution quasi-static strain measurements in the treatment well and is particularly effective for post-fracturing production monitoring.OFDR-DSS,employing swept-frequency coherent detection,is mainly used in laboratory experiments and numerical-model validation;(2)Downhole fiber-optic deployment has evolved from permanent behind-casing installation to permanent/semi-permanent outside-tubing configurations and fully retrievable inside-tubing configurations.Among these,behind-casing installation provides the best coupling to the formation,outside-tubing installation offers improved maintainability and flexibility,and inside-tubing installation provides the greatest operational convenience;(3)The diagnostic theory of DSS has evolved from qualitative interpretation of field measurements and qualitative multi-physics forward modeling to quantitative inversion of fracture parameters using optimization-based methods.With the integration of artificial intelligence,a comprehensive diagnostic workflow is emerging that consists of physical signal acquisition,forward modeling,inversion and interpretation,and intelligent diagnosis;(4)DSS still faces limitations in spatial coverage and temperature sensitivity.Consequently,multiwell deployment and the integration of DSS with DTS,DAS,microseismic monitoring,and other monitoring techniques are increasingly adopted,making multimodal cooperative monitoring an important direction for future development.Looking ahead,DSS is expected to achieve enhanced sensing performance and more robust diagnostic theories,becoming one of the key technologies for hydraulic fracturing monitoring. 展开更多
关键词 Hydraulic fracturing DSS LF-DAS RFS-DSS OFDR-DSS Downhole deployment Field application Fracturing diagnosis
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Dynamic mechanical characteristics and application of constant resistance energy-absorbing supporting material 认领 引用 被引量：29
20
作者 Qi Wang Shuo Xu +3 位作者 Manchao He Bei Jiang Huayong Wei Yue Wang 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2022年第3期447-458,共12页
In deep underground engineering,rock burst and other dynamic disasters are prone to occur due to stress concentration and energy accumulation in surrounding rock.The control of dynamic disasters requires bolts and cab... In deep underground engineering,rock burst and other dynamic disasters are prone to occur due to stress concentration and energy accumulation in surrounding rock.The control of dynamic disasters requires bolts and cables with high strength,high elongation,and high energy-absorbing capacity.Therefore,a constant resistance energy-absorbing(CREA)material is developed.In this study,the dynamic characteristics of the new material are obtained via the drop hammer tests and the Split Hopkinson Pressure Bar(SHPB)tests of the new material and two common bolt(CB)materials widely used in the field.The test results of drop hammer test and SHPB test show that the percentage elongation of CREA material is more than 2.64 and 3.22 times those of the CB material,and the total impact energy acting on CREA material is more than 18.50 and 21.84 times,respectively,indicating that the new material has high elongation and high energy-absorbing capacity.Subsequently,the CREA bolts and cables using the new material are developed,which are applied in roadways with high stress and strong dynamic disturbance.The field monitoring results show that CREA bolts and cables can effectively control the surrounding rock deformation and ensure engineering safety. 展开更多
关键词 Constant resistance energy-absorbing Supporting material Dynamic impact tests Mechanical characteristics Field application
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