检索结果-南通市图书馆

Numerical simulation on proppant migration and placement within the rough and complex fractures

Petroleum Science 2022年第5期19卷 2268-2283页

作者： Tian-Kui Guo Zhi-Lin Luo Jin Zhou Yuan-Zhi Gong Cai-Li Dai Jin Tang Yang Yu Bing Xiao Bao-Lun Niu Ji-Jiang Ge College of Petroleum engineering China University of Petroleum(Huadong)Qingdao266580ShandongChina Southwest oil and Gas Field Company PetroChinaChengdu610051SichuanChina Exploration Division Tarim Oilfield CompanyPetroChinaKorla841000XinjiangChina Dongxin oil production plant Shengli Oil Field BranchSinopecDongying257100ShandongChina Research Institute of Petroleum Exploration and Development PetroChinaBeijing100083China Zhongyuan Petroleum engineering Company SinopecPuyang457001HenanChina Zhongyuan oilfield Company SinopecPuyang457001HenanChina

Hydraulic fracturing is a key technology for the development of unconventional hydrocarbon *** proppant placement morphology determines the fracture conductivity,thus affecting the reservoir stimulation *** this paper,the proppant migration and placement within complex fractures was studied by considering the fracture wall roughness through computational fluid mechanics-discrete element method(CFD-DEM)in numerical simulation,which is a key approach to study the proppant migration and *** results show that the proppant placement non-uniformity,proppant migration capacity,and proppant volume filled in the far-end and the secondary branched fracture are enhanced within the rough fracture compared with those within smooth *** proppant migration capacity is increased within the fracture at low inclination angles(<60°)and low approach angles(<90°),and the proppant placement area is larger in the inclined fracture than that in the vertical *** rise of injection rate and fracturing fluid viscosity causes more proppants migrate to far-end or secondary fractures,resulting in a non-proppant area within the near-wellbore *** increase by 1.3 times in the injection rate and 3 times in the fracturing fluid viscosity leads to a decrease by 26.6%and 27%,respectively,in the proppant placement area within the near-wellbore *** staged injection with small size proppants followed by large size proppants increases the proppant placement area in the primary fracture by 13%-26%,and that with large size proppants followed by small size proppants increases the proppant placement area by 19%-25%,which is due to that the latter method facilitates filling of the secondary branched *** injection location mainly affects the proppant filling degree within the near-wellbore *** with the upper injection,the middle and lower injection is not beneficial to filling of proppants within the near-wellbore fracture.

关键词： Hydraulic fracturing Proppant migration and placement Rough fracture wall Complex fracture CFD-DEM coupling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Genesis of Fibrous Calcite in the Chang 7 Member of the Yanchang Formation,Ordos Basin,China

引用

地质学报:英文版 2023年第5期97卷 1490-1502页

作者： LIU Guanglin LIU Xianyang MA Xiaofeng MA Shuang WANG Xiaofeng LI Shuo SHI Zhiqiang WANG Yanxin State Key Laboratory of oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China National engineering Laboratory for Low Permeability oil and Gas Field Exploration and Development Xi’an 710018China Exploration and Development Research Institute of PCOC Xi’an 710018China PetroChina Changqing oilfield Company(PCOC) Xi’an 710018China Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China Geological Research Institute of the First oil production plant of PCOC Xi’an 710018China engineering Cost Management Department of PCOC Xi’an 710018China

To explore the genesis of the laminated calcite veins developed in the black shale of Chang 73 submember of the Ordos Basin,the petrology,microstructure and geochemistry of calcite veins are studied using thin sections,fluid inclusions,trace elements and isotopic *** source,the time of formation,the mechanism of formation,and the dynamic background of the veins are *** veins are mostly made up of calcite,mixed with lenticular or spindle-shape solid wall rock *** structures are identified in the calcite minerals:fibrous,rhombic cleavage,and wedge-like *** elements and isotopes of carbon and oxygen confirm that the calcite veins were formed from a high density hydrothermal *** is assumed that calcite veins formed prior to wall rock consolidation during the formation of the Qinling Orogenic Belt in the Middle and Late *** results show that the sedimentary sources of Chang 73 submember were influenced by hydrothermal materials besides terrigenous *** fibrous calcite is different from the fibrous calcite reported in the morphology and mechanism of *** this way,the research complements and improves the morphology and the mechanism of formation of fibrous calcite.

关键词： fibrous calcite veins lacustrine black shale hydrothermal fluid Chang 7 member Ordos Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transcriptome analysis of Idesia polycarpa Maxim. var vestita Diels fl owers during sex differentiation

引用

Journal of Forestry Research 2020年第6期31卷 2463-2478页

作者： Tingting Li Fosheng Li Lanju Mei Na Li Min Yao Lin Tang Key Laboratory of Bio-Resources and Eco-Environment Ministry of EducationCollege of Life SciencesSichuan UniversityChengdu 610064SichuanPeople’s Republic of China National and Local Joint engineering Laboratory for Energy plant Bio-oil production and Application Chengdu 610065People’s Republic of China

Idesia polycarpa *** vestita *** a dioecious tree species native to eastern *** are diffi culties associated with distinguishing the sex of the plant at the seedling *** order to explore the mechanism of sex diff erentiation in fl ower development,we conducted the transcriptome profi les of male and female fl owers at early,metaphase and late developmental *** 123,335 unigenes with a total length of 83,996 Mb and an average length of 168 bp were *** unigenes were blasted into Nr,Nt,Pfam,KOG/COG,Swiss-prot,KEGG,GO *** analysis demonstrated that *** and black cottonwood had the highest homology with the alignment of 92,871 *** study identifi ed 80 groups of transcription factor families with a total of 1475 unigenes,mainly including MYB,WRKY,AP2 and bHLH transcription factor *** pathway analysis showed that the expression of numerous plant hormones(cytokinin,gibberellin and ethylene)and fl avonoid biosynthesis pathway were diff erent at various stages of female and male fl ower *** addition,a number of unigenes associated with fl owering were identifi ed which were key genes associated with photoperiodic,vernalization,thermosensory,gibberellin,and autonomic *** results show that *** fl oral organ development was in accordance with the ABCDE model,in which the down-regulation of the B gene family might aff ect stamen fertility in late stages of female fl ower *** experiments validated that the expression patterns of 15 unigenes were consistent with those in RNA-seq *** results highlight a central role for plant sex identifi cation in seedling production and a sex-determining mechanism for dioecious *** addition,the transcriptome data provided a theoretical basis for *** genetic diversity analysis and molecular-assisted breeding.

关键词： Dioecious plants Transcriptome sequencing Sex diff erentiation Idesia polycarpa Floral organ development Transcription factor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tectonics and Mechanisms of Uplift in the Central Uplift Belt of the Huimin Depression

引用

Journal of Earth Science 2011年第3期22卷 299-315页

作者：倪金龙郭颖王智敏刘俊来林玉祥李月 State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals College of Geological Sciences & Engineering Shandong University of Science and Technology College of Geological Sciences and engineering Shandong University of Science and Technology Linpan production plant Shengli Oilfield Company SINOPEC

The Huimin（惠民） depression is a third-level tectonic element of the Bohai（渤海） Bay basin in eastern *** central uplift belt is the most important oil and gas accumulation zone in the depression,but the lack of adequate geological studies in the area has greatly hindered exploration and *** this article,using seismic data,fracture mechanics,and a combination of data on fault growth indices and fault throws,we present an analysis of tectonic activity in the central uplift belt and adjacent *** amount of extension is calculated along balanced N-S cross-sections,along with the thickness of strata eroded from the fourth,third,and second members of the Shahejie（沙河街） Formation（Es4-Es2） in the uplift belt,by analyzing porosity and stratigraphic *** addition,uplift features are described,and their timing and processes of formation are analyzed and *** results indicate that strike-slip and extensional tectonic movements coexisted,with the effects of the latter most *** spatial and temporal nature of the extensional move-ments is varied：fault activity during the period Ek-Es4 was the strongest on the northern Ningnan（宁南） fault,and activity in the western part of the area was stronger than that in the east,which in turn was stronger than that in the central region;during Es3-Es2,the strongest fault movements were along the eastern part of the middle Linyi（临邑） fault,and activity in the western part of the area was rela-tively weak,whereas in the mid-west it was the *** extensional movements were a response to the activity of the *** sediments in the lower part of the fourth member of the Shahejie For-mation（Es4x） show that Es4 was the time when the central belt first began to be uplifted *** was uneven during the Paleogene：the western part of the area was uplifted continuously,while the mid-eastern area underwent alternating periods of uplift and *** the Paleogene,a number of differe

关键词： Huimin depression central uplift belt Paleogene tectonic features uplift mechanisms Bohai Bay basin.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A high salt tolerance and low adsorption drag reducer based on non-covalent enhancement

引用

Petroleum Exploration and Development 2020年第6期47卷 1333-1341页

作者： MA Yingxian ZHU Zhi GUO Jianchun ZHOU Han LI Jia XIONG Yujia MA Leyao Petroleum engineering School Southwest Petroleum UniversityChengdu 610500China State Key Laboratory of oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China Downhole Service Company CNPC Chuanqing Drilling Engineering Company LimitedChengdu 610051China Geological Exploration and Development Research Institute CNPC Chuanqing Drilling Engineering Company LimitedChengdu 610051China Shengli oil production plant Sinopec Shengli Oilfield BranchDongying 257000China

To formulate fluids with flowback water,produced water directly to improve the utilization rate of recycling and reduce the adsorption damage of slick water to reservoirs,a high salt tolerance and low adsorption drag reducer was designed and prepared by introducing polar cation fragments to enhance the non-covalent interactions between the *** drag reducer was characterized by IR and *** resistance and viscosity tests were conducted to evaluate its salt resistance *** adsorption and dynamic adsorption retention tests were carried out to evaluate the damage of this reducer to shale *** introduction of cation units into the molecular structure can weak the shielding effect of metal cations to some extent,so the drag reducer can keep a stable molecular structure and good resistant reducing performance under high *** enhancement of non-covalent interaction between chains decreased the free polarity sites,further reduced the possibility of hydrogen bonding between drag reducer molecules and *** high salinity condition,both the adsorption capacity of the drag reducer on the shale surface and the average damage rate to the core permeability are *** with the conventional salt-tolerant system,the overall liquid cost was reduced by 17%and the production per well increased by 44%.The application of this slick water system has achieved remarkable results.

关键词： shale hydraulic fracturing slick water drag reducer low adsorption high salt tolerance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study and application of a new blockage remover in polymer injection wells

引用

Petroleum 2018年第3期4卷 329-336页

作者： Yiyong Pan Changlong Liu Liqiang Zhao Feng Li Yigang Liu Pingli Liu State Key Laboratory of oil&Gas Reservoir Geology and Exploitation engineering(Southwest Petroleum University) Chengdu610500China CNOOC China Co.Ltd. Tianjin BranchTianjin300452China Guangxi oil production plant Southwest Oil and Gas Branch Co.SINOPECDeyang618100China

With the extensive application of polymer flooding technology in offshore oilfields,the plugging in polymer injection wells has become more and more severe,which seriously affects the oil displacement effect and regular production of *** this paper,a new kind of blockage remover has been developed and evaluated by rheological behavior experiments,dissolution experiments and core flooding *** results reveal that this new blockage remover can effectively reduce the viscosity of polymer and completely degrade the reservoir blockage with low corrosion *** is beneficial to long-term production of oil wells in offshore *** of core flooding experiments show that this new blockage remover can relieve polymer damage and improve *** agent has been applied in LD10-1 oilfield in 2016,the daily injection rate increased significantly after stimulation.

关键词： Polymer injection wells Formation plugging Blockage remover Performance evaluation Field application

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on Quantitative Relationship between Surface Wettability and Frictional Coefficient of Liquid Flowing in a Turbulent Horizontal Pipe

引用

China Petroleum Processing & Petrochemical technology 2017年第3期19卷 105-114页

作者： Jing Jiaqiang Qi Hongyuan Jiang Huayi Liang Aiguo Shi Jianying Wang Yulong Sun Nana Zhang Yixiang State Key Laboratory of oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu 610500 oil&Gas Fire Protection Key Laboratory of Sichuan Province Chengdu 611731 College of Petroleum engineering Xi’an Shiyou UniversityXi’an 710065 No.1 production plant of Xinjiang oilfield Branch Company Karamay 834000 Key Laboratory of Thermo-Fluid Science and engineering of Ministry of Education School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049

This paper had investigated the effects of surface wettability on the frictional resistance of turbulent horizontal flow for tap water in five pipes made of various materials and four kinds of liquids in a polytetrafluoroethylene(PTFE) pipe,with the same inner diameter of 14 mm. Pressure drops were measured under different flow rates through an experimental flow loop. The contact angles and adhesion work of liquids in contact with pipe surfaces were determined using a contact angle meter. Based on the dimension and regression analyses, two kinds of modified relationships between the frictional coefficient and the surface wettability were established according to the measured results corresponding to tap water in five pipes and four liquids in PTFE pipe. The experimental results show that the surface wettability has some influence on frictional coefficient of the studied liquids flowing in macroscale pipes, and the frictional coefficient decreases with the increase of the contact angle at the same Reynolds number. Meanwhile the effect of wettability on the hydrophobic surface is greater than that on the hydrophilic one. The frictional coefficients predicted by the modified formulas have verified to be in good agreement with the experimental values, the relative errors of which are within ±6% and ±3% for the tap water flowing in five different pipes and four kinds of liquids flowing in PTFE pipe, respectively.

关键词： wettability contact angle frictional coefficient adhesion work fluid mechanics turbulent flow

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Prediction Model of Refined Gasoline Blending Formula Based on PSO-DBN

引用

China Petroleum Processing & Petrochemical technology 2022年第3期24卷 128-138页

作者： Wang Xiaoming Li Wei Li Yajie Jiang Dongnian Liang Chenglong School of Future Techrology South China University of TechnologyGuangzhou 510641 Pengcheng Laboratory Shenzhen 518000 College of Electrical and Information engineering Lanzhou University of TechnologyLanzhou730050 oil Storage and Transportation plant PetroChina Lanzhou Petrochemical CompanyLanzhou730060

To address the problem of the low accuracy of refined gasoline blending formula in the petrochemical industry,the advantages of deep belief networks(DBNs)in feature extraction and nonlinear processing are considered,and they are applied to the prediction modeling of refined gasoline blending conservative ***,based on historical measured data of refined gasoline blending and according to the characteristics of the data set,we use bootstrapping to divide the training data set and the test data ***,considering that parameter selection for the network is difficult,particle swarm optimization is adopted to improve the related optimal parameters and replace the tedious process of manually selecting parameters,greatly improving optimization *** addition,the contrastive divergence algorithm is used for unsupervised forward feature learning and supervised reverse fine-tuning of the network,so as to construct a more accurate prediction model for conservative ***,in order to evaluate the effectiveness of this method,the simulation results are compared with those of traditional modeling methods,which show that the DBNs has better prediction performance than error back propagation and support vector machines,and can provide production guidance for refined gasoline blending formula.

关键词： formulation prediction deep belief network contrastive divergence particle swarm optimization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A New Fractional Order Chaotic System with 4-scroll Chaotic Attractors and Its Adaptive Control

A New Fractional Order Chaotic System with 4-scroll Chaotic ...

引用

第36届中国控制会议

作者： Qiong Wang Lingjun Meng Keyong Shao Xing Han Hai Huang Kun Qian School of Electrical and Information engineering Northeast Petroleum University School of Information technology Bayi Agricultural University Sewage Treatment brigade of Shuguang oil Extraction Factory China National Petroleum Corporation No.3 oil Mine of The Third oil production plant China National Petroleum Corporation

ISBN: (纸本)9781538629185

This paper investigates the coupling of three nonlinear fractional differential equations, which analyzes the dynamic characteristics of the system and uses the modified DTM method to solve the nonlinear fractional differential equation of it. We use the method of ’0-1 test’ to verify chaotic of the system, compute Lyapunov exponents to verify the regimes of chaotic dynamics, and design a nonlinear controller to influence the trajectory of the system.

关键词： Fractional order Chaotic system Chaotic Attractors MDTM method ’0-1 test’ Lyapunov exponents nonlinear controller

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Investigation of image segmentation effect on the accuracy of reconstructed digital core models of coquina carbonate

引用

Applied Geophysics 2020年第4期17卷 501-512页

作者： Wang Hai-Tao Wang Li Lai Fu-Qiang Zhang Jin-Yan School of Petroleum engineering Chongqing University of Science&TechnologyChongqing 401331China National and Local Joint engineering Research Center of Shale Gas Exploration and Development Chongqing 401120China Key Laboratory of Complex oil and Gas Field Exploration and Development Chongqing University of Science&TechnologyChongqing 401331China The First oil production plant of Changqing oilfi eld PetroChina Company LimitedShanxi Yan’An 716000China Logging Application Research Institute CNPC LoggingShanxi Xi’An 710000China Well Logging Company Shengli Oilfi eld Service CorporationSinopecShandong Dongying 257096China

Digital core models reconstructed using X-ray tomography(X-CT)enable the quantitative characterization of the pore structure in three dimensions(3D)and the numerical simulation of *** the X-CT images accurately reflect the micro structures of core samples,the greyscale threshold in the image segmentation determines the accuracy of digital cores and the simulated petrophysical ***,it is vital to investigate the comparison parameter for determining the key greyscale threshold and the criterion to describe the accuracy of the *** coquina digital core models from X-CT are used in this work to study the impact of grayscale threshold on the porosity,pore percolation,connectivity and electrical resistivity of the pore scale model and these simulations are calculated by Minkowski functions,component labeling and fi nite element method,respectively,to quantify the pore structure and simulate electrical *** showed that the simulated physical properties of the digital cores,varied with the gradual increase of the greyscale *** the four parameters related to the threshold,the porosity was most sensitive and chose as the comparison parameter to judge the accuracy of the greyscale *** variations of the threshold change the micro pore structures,and then the electrical *** the porosity of the digital core model is close to the experimental porosity,the simulated porosity exponent matches the experimental porosity exponents *** good agreement proved that the porosity is the critical comparison parameter to describe the accuracy of image *** criterion is that the porosity of the digital core after segmentation should be close to the experimental porosity.

关键词： Porous media X-CT image segmentation digital core electrical resistivity simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：