检索结果-南通市图书馆

Fracture Mechanism of the Formation with a Natural Flaw Under a Single-Tooth Cutting

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 2020年第5期33卷 719-730页

作者： Siqi Li Wei Li Tie Yan Fuqing Bi Huan Zhao Xin Ling institute of Petroleum Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangChina The Fifth Oil production Plant of daqing oilfield Daqing163513HeilongjiangChina

The process of a single-tooth cutting formation is taken as the representative to analyze the fracture mechanism of the formation with natural flaws under the PDC drill *** modeling of the stress field distribution of the formation under a single tooth is proposed ***,the modeling of the stress intensity factor K,T-stress and the initiation angleθof the flaw under two far-field compressive loads in two cases are presented based on the mode-II ***,the results of theoretical calculations and simulations are given and *** on the analysis undertaken,it can be concluded that the confinement ratioλapplying on the flaw changes nonlinearly with the variation inα+φ.The relationship between the dimensionless ratioβx/βy of T-stress and the rotational polar angleφis a parabola with an upward *** the direction of the cutting force is consistent with the flaw,the stress intensity factor K and the initiation angleθat the tip of the flaw reach the *** addition,the angle between the cutting force and the flaw weakens the T-stress and inhibits the crack initiation and propagation of the *** results of numerical simulations show good agreement with theoretical calculations.

关键词： Single-tooth cutting Stress field Stress intensity factor Initiation angle Extended finite element

Factors controlling the formation and evolution of source rocks in the Shahezi Formation,Xujiaweizi fault depression,Songliao Basin

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Geoscience 2023年第2期4卷 1-16页

作者： Xiang Zhou Lidong Sun Exploration and production Research institute PetroChina Daqing Oilfield CompanyDaqingHeilongjiang163712China

The types and quality of source rocks in the Shahezi Formation are the key factors affecting the distributions of various deep gas reservoirs in the Xujiaweizi fault depression in Songliao *** clarify the quality differences and origins of different types of source rocks in the Shahezi Formation,this study reconstructed the sedimentary and water environment,determined the controlling effects of fault activity,sedimentary facies,and paleo-sedimentary environment on the quality of various source rocks,by making full use of seismic,logging,core,organic geochemical and element geochemical *** results show that two types of source rocks developed in the Shahezi Formation,namely,mudstones and *** mudstones have a relatively high abundance of organic matter,which consists of type-Ⅱ kerogen and partial type-Ⅲ kerogen,and are concentrated in Sha-I *** coals have a high abundance of organic matter,which consist of type-Ⅲ kerogen,and are mainly distributed in Sha-Ⅱ *** the deposition of Sha-I Member,intense fault activity formed arrow,deep-water lacustrine basins with high salinity and strong reducibility on the downthrow sides of *** the deposition of Sha-II Member,fault activity progressively weakened,and the areas of lacustrine basins enlarged to their maximum values and became wide,shallow-water basins with low salinity and low *** development of source rocks was controlled by fault activity,sedimentary facies,and paleo-sedimentary *** activity formed accommodation space on the downthrown sides of faults for mudstone accumulation,thus determining mudstone *** sedimentary environment controlled the organic matter input and determined the distribution of mudstones and *** paleo-sedimentary environment,which consisted of paleo-salinity,as well as paleo-water depth and redox conditions,affected the accumulation and preservation of organic matter and is the main controlling factor for the

关键词： Fault Paleo-environment evolution Source rock Deep gas reservoirs Shahezi Formation Xujiaweizi fault depression

Micro-acting Force in Boundary Layer in Low-Permeability Porous Media

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第2期28卷 148-151页

作者： FENG Yu-Liang ZHANG Yuan JI Bing-Yu MU Wen-Zhi Automation Department Nanjing University of Science and TechnologyNanjing 210094 Earth Science institute Northeast Petroleum UniversityDaqing 163318 daqing oilfield Exploration and Development institute Daqing 163712 SINOPEC Exploration and production Research institute Beijing 100083

There are lots of reasons to restrict a low-permeability oil layer to enhance the recovery *** on the research results of non-Darcy flow,microfiow of water drive and micro-acting force in low permeability porous media are studied by establishing the expression of fluid viscosity *** calculation shows that under the condition of L/S interaction,the radial velocity distribution near the solid wall changes obviously,and the curve form changes from convex to *** tinier the capillary radius is,the stronger the L/S interaction *** larger the n value is,more obviously the flowing velocity *** results will help people to deal with improving recovery factor of low permeability reservoir,and understanding the fluid How behavior in blood capillary.

关键词： capillary radius establishing

Distribution and genesis of the anomalously high porosity zones in the middle-shallow horizons of the northern Songliao Basin

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2010年第3期7卷 302-310页

作者： Meng Yuanlin Liang Hongwei Meng Fanjin Wu Heyong Wang Cheng Xiu Hongwen Zhang Anda Li Yaguang Guo Rixin School of Earth Science Northeast Petroleum University Daqing 163318 China Exploration and Development Research institute Daqing Oilfield Company Ltd. Daqing 163712 China No. 1 Petroleum production Subcompany Daqing Oilfield Company Ltd. Daqing 163113 China

High-quality reservoirs occur in the middle-shallow horizons of the northern Songliao Basin. The distribution and genesis of their anomalously high porosity zones were studied using measured porosities, examination of ordinary thin sections and blue epoxy resin-impregnated thin sections and by SEM. The results show that there are three anomalously high porosity zones at the depth of 450-900 m, 1,300-1,900 m, 2,050-2,350 m respectively, named zone i, zone ii and zone iii from top to bottom. Horizontally, zone i and zone ii are distributed all over the basin except in the Southeastern Uplift, while zone iii is only distributed in the Central Depression. Zone i was formed by meteoric water leaching as well as organic acid dissolution. Zones ii and iii were dominantly formed by organic acid dissolution. Additionally, clay mineral transformation generating H＋ and hydrocarbon emplacement retarding the cementation of sandstones are also important for the formation of zones ii and iii.

关键词： Anomalously high porosity zone diagenetic fluid organic acid diagenesis secondaryporosity hydrocarbon emplacement sedimentary facies Songliao Basin

SEEPAGE ABILITY OF HIGH-PRESSURE HOT COMPOSITE FOAM IN POROUS MEDIA

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2010年第1期22卷 90-95页

作者： WANG Ke-liang LIANGShou-cheng YUAN Xin-qiang CHEN Jin-feng The Key Laboratory of Enhanced Oil and Gas Recovery of the Ministry of Education Daqing Petroleum Institute Daqing 163318 China College of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China The Second Oil production Company of daqing oilfield Company Ltd. Daqing 163414 China

The technology of hot composite foam displacement refers to the injection of high-temperature flue gas and foaming and stabilizing agent into wells with a certain concentration, and after meeting the formation water, a composite foam system is formed in the reservoir. This foam displacement technology involves thermal function and so is related to nitrogen, carbon dioxide and foam flooding characteristics. After analyzing seepage flow law of hot composite foam system, seepage flow experiment of composite foam under high pressure was conducted, and seepage flow ability of hot composite foam in porous media was investigated. In the experiment, surfactant HY-3 was chosen as the foaming agent and hot flue gas was chosen as the foaming gas, and high-pressure hot foaming apparatus was employed in experiments. The experimental results indicate that the surfactant HY-3 could form stable foam in porous media, and the foam has strong ability of plugging. It is concluded that the sealing performance of foam is improved with increasing permeability and resistance coefficient and with incresing injection rate and foam strength. After foam injection, sealing characteristics of heterogeneous cores is better than that of homogeneous cores. The foam pressure has a process of transmission in porous media. In this process, with the increase of injection volume, pressure from the inlet to the outlet increases gradually, which indicates that stable foam has been formed inside the core.

关键词： composite foam surfactant HY-3 seepage flow under high pressure porous media

EXTRUSION DIE CAE OF THE STEEL REINFORCED PLASTIC PIPE

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2004年第3期17卷 303-306页

作者： W.Q.Ma H.Y.Sun D.C.Kang K.D.Zhao Harbin institute of technology Harbin 150001 China Daqing Oilfield Postdoctoral Workstation Daqing 163453 ChinaHarbin University of Science and Technology Harbin 150080 China Daqing Oilfield Postdoctoral Workstation Daqing 163453 ChinaHarbin Institute of Technology Harbin 150001 ChinaHarbin Institute of Technology Harbin 150001 China

The steel reinforced plastic pipe is a new kind of pressure pipe. It is made up with steelwires and plastic. Because reinforced skeleton of the steel wire increase the complexityof plastic flow during the extrusion phase, the traditional design criteria of extrusiondie is not suitable. The study on extrusion die of the kind of pipe is very importantstep in produce development. Using finite element (FE) method in this paper, theflow rule of molten plastic inside the die has been predicted and a groap of optimalstructural parameters was obtained. These results are helpful for reducing the designcycle and improve the quality of the final product.

关键词： steel reinforced plastic pipe extrusion die computer aid engineering(CAE)

Application of binding theory for seepage of viscoelastic fluid in a variable diameter capillary

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2017年第4期29卷 621-631页

作者：杨二龙谷婷婷王梅李欢 Key Laboratory on Enhanced Oil and Gas Recovery of the Ministry of Education Northeast Petroleum University daqing oilfield of China National Petroleum Corporation School of Computer and Information technology Northeast Petroleum University Second Oil production Plant of daqing oilfield of CNPC

The polymer solution for polymer flooding is a viscoelastic fluid. There exist both shear flow and elongational flow when the polymer solution flows in a porous medium, where an additional dissipation is involved. The additional dissipation caused by elongational deformation is often ignored while studying the flow of the fluid in a porous medium. For a complex polymer solution, the generated elongational pressure drop cannot be ignored. In a capillary of fixed diameter, the polymer solution is only impacted by the shear force, and its rheological property is pseudoplastic. Therefore the variable diameter capillary and the converging-diverging flow model with different cross sections are required to describe the flow characteristics of the polymer solution in porous media more accurately. When the polymer solution flows through the port, we have the elongational flow and the polymer molecules undergo elongational deformation elastically. By using the mechanical energy balance principle and the minimum energy principle, a mathematical model of non-Newtonian fluid inlet flow was established by Binding. On the basis of the Binding theory, with the application of the theory of viscoelastic fluid flow in the circular capillary and the contraction-expansion tube, the relations between the viscoelastic fluid flow rate and the pressure drop are obtained.

关键词： Binding theory viscoelastic fluid abrupt contraction capillary permeability rule

Research on the solid particle erosion wear of pipe steel for hydraulic fracturing based on experiments and numerical simulations

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第4期21卷 2779-2792页

作者： Si-Qi Yang Jian-Chun Fan Ming-Tao Liu De-Ning Li Jun-Liang Li Li-Hong Han Jian-Jun Wang Shang-Yu Yang Si-Wei Dai Lai-Bin Zhang State Key Laboratory of Oil and Gas Equipment CNPC Tubular Goods Research InstituteXi'an710077ShaanxiChina Key Laboratory of Oil and Gas Safety and Emergency technology China University of PetroleumBeijing102249China Oil production technology Research institute of Liaohe oilfield Company Panjin124010LiaoningChina Tianjin Gas Storage Branch PetroChina Dagang Oilfield CompanyTianjin300280China Petroleum production Engineering Research institute Daqing Oilfield CompanyDaqing163712HeilongjiangChina

Erosion wear is a common failure mode in the oil and gas *** the hydraulic fracturing,the fracturing pipes are not only in high-pressure working environment,but also suffer from the impact of the high-speed solid particles in the fracturing *** such complex conditions,the vulnerable components of the pipe system are prone to perforation or even burst accidents,which has become one of the most serious risks at the fracturing ***,it is not yet fully understood the erosion mechanism of pipe steel for hydraulic ***,this article provides a detailed analysis of the erosion behavior of fracturing pipes under complex working conditions based on experiments and numerical ***,we conducted erosion experiments on AISI 4135 steel for fracturing pipes to investigate the erosion characteristics of the *** effects of impact angle,flow velocity and applied stress on erosion wear were comprehensively *** a particle impact dynamic model of erosion wear was developed based on the experimental parameters,and the evolution process of particle erosion under different impact angles,impact velocities and applied stress was *** combining the erosion characteristics,the micro-structure of the eroded area,and the micro-mechanics of erosion damage,the erosion mechanism of pipe steel under fracturing conditions was studied in detail for the first *** high-pressure operating conditions,it was demonstrated through experiments and numerical simulations that the size of the micro-defects in the eroded area increased as the applied stress increased,resulting in more severe erosion wear of fracturing pipes.

关键词： Erosion wear Applied stress Particle impact dynamics Erosion mechanism

Effect of nanocomposite pour point depressant EVAL/CNT on flow properties of waxy crude oil

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2023年第6期20卷 3807-3818页

作者： Yang Liu Zheng-Nan Sun Sheng-Zhu Ji Yi-Hai Yang Jian-Qi Xu Guo-Lin Jing Provincial Key Laboratory of Oil&Gas Chemical technology College of Chemistry&Chemical EngineeringNortheast Petroleum UniversityDaqing163318HeilongjiangChina No.8 Oil production Plant Engineering technology Brigade Daqing OilfieldDaqing163514HeilongjiangChina

The nanocomposite EVAL-CNT was produced by chemical grafting in the solution system through the esterification of ethylene-vinyl alcohol copolymer (EVAL) and carboxylated multi-walled carbon nanotubes (O-MWCNT), and its structural properties were characterized. The improvement of the rheological properties of the waxy oil system by the novel pour point depressant was investigated using macroscopic rheological measurements and microscopic observations. The results showed that EVAL-CNT nanocomposite pour point depressant (PPD) could significantly reduce the pour point and improve the low temperature fluidity of crude oil and had better performance than EVAL-GO at the same addition level. The best effect was achieved at the dosing concentration of 400 ppm, which reduced the pour point by 13 ℃ and the low-temperature viscosity by 85.4%. The nanocomposites dispersed in the oil phase influenced the precipitation and crystallization of wax molecules through heterogeneous crystallization templates, which led to the increase of wax crystal size and compact structure and changed the wax crystal morphology, which had a better effect on the rheological properties of waxy oil.

关键词： Pour point depressant Carbon nanotubes Nanocomposites Waxy crude oil Rheological behavior