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Radial Permeability Measurements for Shale Using Variable Pressure Gradients

Acta Geologica Sinica(English Edition) 2020年第2期94卷 269-279页

作者： FAN Kunkun sun renyuan DEREK ELS WORTH DONG Mingzhe LI Yajun YIN Congbin LI Yanchao CHEN Zhongwei WANG Chunguang State Key Laboratory of Mining Disaster Prevention and Control Shandong University of Science and TechnologyQingdao 266555China College of Energy and Mining Engineering.Shandong University of Science and Techology.Qingdao 266555 China College of Petroleum Engineering Chinese University of PetroleumQingdao 266555ShandongChina Energy and Mineral Engineering Pennsylvania State University PA 16X01USA Department of Chemical and Petroleum Engineering University of CalgaryAB T2NIN4Canada Downhole Service Company.Chuanqing Drilling Company CNPCChengdu 610051SichuanChina School of Mechanical and Mining Engineering The University of QueenslandQLD 4074Australia

Shale gas is becoming an important component of the global energy supply, with permeability a critical controlling factor for long-term gas production. Obvious deviation may exist between helium permeability determined using small pressure gradient(SPG) methods and methane permeability obtained under actual field production with variable pressure gradients(VPG). In order to more accurately evaluate the matrix permeability of shale, a VPG method using real gas(rather than He) is established to render permeability measurements that are more representative of reservoir conditions and hence response. Dynamic methane production experiments were performed to measure permeability using the annular space in the shale cores. For each production stage, boundary pressure is maintained at a constant and the gas production with time is measured on the basis of volume change history in the measuring pump. A mathematical model explicitly accommodating gas desorption uses pseudo-pressure and pseudo-time to accommodate the effects of variations in pressuredependent PVT parameters. Analytical and semi-analytical solutions to the model are obtained and discussed. These provide a convenient approach to estimate radial permeability in the core by nonlinear fitting to match the semi-analytical solution with the recorded gas production data. Results indicate that the radial permeability of the shale determined using methane is in the range of 1×10-6– 1×10-5 mD and decreases with a decrease in average pore pressure. This is contrary to the observed change in permeability estimated using helium. Bedding geometry has a significant influence on shale permeability with permeability in parallel bedding orientation larger than that in perpendicular bedding orientation. The superiority of the VPG method is confirmed by comparing permeability test results obtained from both VPG and SPG methods. Although several assumptions are used, the results obtained from the VPG method with reservoir gas are m

关键词： shale radial permeability variable pressure gradients pseudo pressure pseudo time

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The effect of silica nanoparticle aggregates on wax dissolution in diesel oil

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Petroleum Science 2011年第2期8卷 207-210页

作者： sun renyuan Wang Lei sun Chao Lin Lei Jiang Hanqiao School of Petroleum Engineering China University of Petroleum Qingdao Shandong 266555 China Institute of Drilling ＆ Production Technology Jidong Oilfield Tangshan Hebei 063004 China Xianhe Oil Production Plant Shengli Oilfield Dongying Shandong 257000 China School of Petroleum Engineering China University of Petroleum Beijing 102249 China

In recent years, silica nanoparticle aggregates （SNPAs） have been used to decrease the injection pressure of wells in low permeability reservoirs achieving good results. In order to study the mechanisms for reduction in the injection pressure of low permeability wells by the SNPA-diesel oil system injection, the microstructure of SNPAs was observed with a transmission electron microscope （TEM）. The particle size distribution of SNPAs was also measured by the laser scattering method. The viscosities of diesel oil and SNPA-diesel oil system were measured with a capillary viscometer. The effect of SNPAs on the solubility of wax in the diesel oil was experimentally studied. The influencing factors, including temperature and SNPA concentration in diesel oil, on wax solubility were analyzed. A pore-throat film displacement model （PTFDM） was built for mechanism explanation. The microstructure and size distribution analyses show that the SNPAs are in the nanometer size range. The viscosity of the SNPA-diesel oil system is lower than that of the diesel oil. The solubility of wax in the diesel oil increases greatly due to SNPA addition, the solubility ratio reaches 7.5. The solubility of wax in diesel oil increases with increases in the concentration of SNPAs in the diesel oil and with the temperature. It is proved that the addition of SNPAs to diesel oil helps remove the wax deposited near the wellbore. This maybe one of the main mechanisms for injection pressure decreases in low permeability reservoirs.

关键词： Silica nanoparticle aggregates solubility of wax low permeability reservoir pore-throatfilm displacement model injection pressure

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纳米聚硅材料对黏土膨胀性的影响(英文)

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硅酸盐学报 2008年第3期36卷 391-394,410页

作者：孙仁远王磊中国石油大学石油工程学院山东东营257061

利用透射电镜观察了纳米聚硅材料的微观结构,测量了添加不同浓度纳米聚硅材料柴油的黏度,采用页岩膨胀仪评价了黏土矿物在蒸馏水、柴油和纳米聚硅材料-柴油溶液中的膨胀性。研究表明:纳米聚硅材料的粒度小于100nm,具有憎水性;添加纳米... 详细信息

利用透射电镜观察了纳米聚硅材料的微观结构,测量了添加不同浓度纳米聚硅材料柴油的黏度,采用页岩膨胀仪评价了黏土矿物在蒸馏水、柴油和纳米聚硅材料-柴油溶液中的膨胀性。研究表明:纳米聚硅材料的粒度小于100nm,具有憎水性;添加纳米聚硅材料后柴油的黏度略有增加,而且随纳米聚硅材料浓度的增加,体系黏度增大。黏土矿物在纳米聚硅材料-柴油溶液中的膨胀率比在蒸馏水中的降低90%以上。随纳米聚硅材料浓度的增加,黏土矿物的膨胀率降低。黏土矿物在纳米聚硅材料-柴油中的膨胀率比在柴油中的小。膨胀后的黏土矿物浸入纳米聚硅材料-柴油溶液后,收缩率为2.9%,说明纳米聚硅材料-柴油溶液对黏土矿物的膨胀有一定的抑制作用,这对解释低渗透油藏纳米聚硅材料-柴油溶液降压增注机理具有重要意义。

关键词：黏土膨胀性抑制作用纳米聚硅材料增注

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高压含气原油凝点测量新方法

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化工学报 2008年第3期59卷 756-760页

作者：孙仁远耿宏章孙志峰中国石油大学(华东)石油工程学院中国石油大学(华东)物理科学与技术学院山东东营257061

The gel point of crude oil is one of the important parameters for oil and gas field development, oil and gas storage and *** conventional method can only measure the gel point of the crude oil free of gas under atmospheric pressure.A new method for measuring the crude oil with dissolved gas under high pressure based on a new measurement principle was proposed.A new instrument of gel point measurement for crude oil with dissolved gas under high pressure was *** result measured by the new instrument was compared with that measured by the conventional *** effect of pressure and solution gas-oil ratio on the gel point of crude oil was *** showed that the results measured by the new instrument coincided with that by the conventional method for crude oil free of gas under atmospheric *** the same solution gas-oil ratio, the gel point of crude oil with dissolved gas increased with pressure, the gel point increased by 0.7℃ with 2.0 MPa pressure increment in the experimental *** gel point of crude oil with dissolved gas decreased with solution gas-oil ratio under the same pressure, the gel point decreased by 1.0℃ with 10.0 m3·m-3 solution gas-oil ratio increment in the experimental *** result is of importance to the management of waxy oil production and the design for oil and gas storage and transportation.

关键词：原油凝点测量方法溶解气高压

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Application of 3D Reservoir Geological Model on Es1 Formation, Block Nv32, Shenvsi Oilfield, China

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Open Journal of Yangtze Oil and Gas 2020年第2期5卷 54-72页

作者： Ayman Al Rassas Shaoran Ren renyuan sun Atif Zafar Safea Moharam Zhenliang Guan Alalimi Ahmed Mohammed Alomaisi School of Petroleum Engineering China University of Petroleum (East China) Qingdao China Department of Petroleum Technology University of Karachi Karachi Pakistan College of Computer Science China University of Geosciences Wuhan China Faculty of Earth Resources China University of Geosciences Wuhan China School of Chemistry and Environment South China Normal University Guangzhou China

Three-dimensional geological modeling of reservoirs is an essential tool to predict reservoir performance and improve the understanding of reservoir uniqueness in Es1 formation. The paper focuses on the use of petrel software to build three-dimensional reservoir geological model which characterizes and assesses block Nv32 that located in the west of the Shenvsi oilfield in the south of Cangzhou city, Hebei province of China, and has an oil-bearing area of 1.4 km2. This study is depending on integration data from well logs of 22 wells which provided from geology, geophysics, and petrophysics to identify and provide precise depict of the subsurface internal structure and the reservoir heterogeneity. Input data was used to build the structural model, sedimentary facies model, petrophysical properties (porosity, permeability, saturation, and N/G model, and finally to determine the reservoir volume. The lithological facies were simulated using the assigned value method. Moreover, Petrophysical properties (Porosity, permeability, oil saturation and net to gross) were constructed for each zone using the Sequential Gaussian Simulation method to guide the distribution of petrophysical properties of Es1 formation, block Nv32. Statistical analysis of the porosity, permeability, oil saturation and N/G model present that the porosity occurrence distribution is mainly concern between 0.2% - 36.39% of block Nv32 with an average porosity value of 17.5%, permeability between 0.017 mD to 974.8 mD, having an average permeability of 59.44 mD, oil saturation between 0.00 to 0.95 having an average value of 0.22, and N/G is mainly concentrated between 0.01 to 1.00 within an average value of 0.61. This research has indicated the reliability of the three-dimensional model technique as a suitable tool to provide a sufficient understanding of petrophysical distribution. The south-western and north-western indicate that oilfield is very promising an exploratory well should be drille

关键词： 3D Reservoir Geological Model Es1 Formation Block Nv32 Structural Model Petrophysical Model

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EXPERIMENTAL STUDIES ON WATER-FLOODING PROCESS UNDER VIBRATING STIMULATIONS

EXPERIMENTAL STUDIES ON WATER-FLOODING PROCESS UNDER VIBRATI...

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The Second International Conference on Dynamics Vibration and Control

作者： renyuan sun School of Petroleum Engineering China University of Petroleum Dongying 257061 China

＜正＞A new system for the simulation of artificial vibration oil production （AVOP） was designed. The water-flooding process under vibrating stimulation with different frequency and amplitude were conducted on the system. The cores used were man-made cores and the oil was simulated oil. The vibrating stimulation were conducted in the whole process, in the stage of high water-cut and periodic

关键词： artificial vibration artificial vibration oil production(AVOP) oil recovery factor water cut enhanced oil recovery(EOR)

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轴向磁通永磁电机空载气隙磁场建模分析

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中国电机工程学报 2018年第5期38卷 1525-1533页

作者：孙明灿唐任远韩雪岩佟文明沈阳工业大学国家稀土永磁电机工程技术研究中心

针对轴向磁通永磁电机有限元仿真较为耗时的问题,建立了轴向磁通永磁电机空载气隙磁场解析模型。提出通过建立虚拟等效直线电机模型用以计算气隙磁场端部效应修正函数,使得空载气隙磁场模型得以整体解析化。给出了气隙磁导函数相应的替... 详细信息

针对轴向磁通永磁电机有限元仿真较为耗时的问题,建立了轴向磁通永磁电机空载气隙磁场解析模型。提出通过建立虚拟等效直线电机模型用以计算气隙磁场端部效应修正函数,使得空载气隙磁场模型得以整体解析化。给出了气隙磁导函数相应的替代函数,并对此替代函数进行了傅里叶级数转换,使空载气隙磁场函数具有形式上统一的解析表达式,便于计算机编程实现。对空载气隙磁密、空载反电动势和齿槽转矩进行了解析计算,与有限元计算结果对比,验证了该文所建立的空载气隙磁场模型的正确性和可行性,可以作为轴向磁通永磁电机设计人员参考使用。

关键词：轴向磁通永磁电机空载气隙磁场解析法虚拟等效直线电机模型端部效应

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实现文化自信的路径探讨

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九江职业技术学院学报 2017年第3期 83-84,88页

作者：孙任媛广东文理职业学院广东湛江524400

文化自信是一个国家和民族对自身文化价值的充分肯定,对自身文化生命力的坚定信念。文化自信是全面推进"四个全面"战略布局的精神支撑,实现中华民族伟大复兴的动力源泉,对抗西方意识形态攻击的有力武器。践行文化自信,须从三个维度坚定... 详细信息

文化自信是一个国家和民族对自身文化价值的充分肯定,对自身文化生命力的坚定信念。文化自信是全面推进"四个全面"战略布局的精神支撑,实现中华民族伟大复兴的动力源泉,对抗西方意识形态攻击的有力武器。践行文化自信,须从三个维度坚定文化自信,以社会主义核心价值观引领文化自信,在中国特色社会主义伟大实践中提升文化自信。

关键词：文化自信中华民族路径

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基于Maxwell-Stefan双扩散模型的煤层气注气数值模拟

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中国石油大学学报（自然科学版） 2016年第3期40卷 113-120页

作者：孙晓飞张艳玉李凯李志涛尚凡杰孙仁远中国石油大学石油工程学院山东青岛266580 中国石油大学地球科学与技术学院山东青岛266580 中国石油新疆油田分公司实验检测研究院新疆克拉玛依834000 中海油研究总院开发研究院北京100027

目前煤层气注气数值模拟软件中均以扩展Langmuir模型模拟多组分气体吸附/解吸,以拟稳态单孔扩散模型和Fick定律描述煤层基质中气体扩散,虽然简单,便于应用,但存在较大局限性。以试验数据为依据,评价扩展Langmuir、IAS和2D PR-EOS多组分... 详细信息

目前煤层气注气数值模拟软件中均以扩展Langmuir模型模拟多组分气体吸附/解吸,以拟稳态单孔扩散模型和Fick定律描述煤层基质中气体扩散,虽然简单,便于应用,但存在较大局限性。以试验数据为依据,评价扩展Langmuir、IAS和2D PR-EOS多组分气体吸附模型可靠性,并建立Maxwell-Stefan双扩散模型模拟气体扩散过程。最后,将双扩散模型与煤储层气水两相多组分渗流模型耦合,利用IMPES方法求解研究煤层气注气过程。研究表明:2D PR-EOS模型预测结果优于扩展Langmuir和IAS模型;注气初期基质中多组分气体吸附和甲烷解吸速率较快,之后逐渐变缓;该模拟方法可以较为准确地模拟煤层气衰竭和注气开发过程,预测煤基质中气体各组分浓度分布,为煤层气注气开发的研究及现场应用提供有效的技术手段。

关键词：煤层气注气多组分吸附双扩散模型 Maxwell-Stefan方程

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基于竞争吸附的页岩气藏提高采收率机理

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新疆石油地质 2021年第2期42卷 224-231页

作者：孙莹孙仁远刘晓强李淑霞中国石油大学(华东)石油工程学院山东青岛266580

为研究注CO_2提高页岩气藏采收率的机理以及确定合理的注入参数,以页岩吸附解吸实验为基础,对比了页岩自然降压开采和在不同注入压力、注入速率下注CO_2开采页岩气藏的实验结果,研究了降压开采和注CO_2开采2种方式下CH_4的采气速率和采... 详细信息

为研究注CO_2提高页岩气藏采收率的机理以及确定合理的注入参数,以页岩吸附解吸实验为基础,对比了页岩自然降压开采和在不同注入压力、注入速率下注CO_2开采页岩气藏的实验结果,研究了降压开采和注CO_2开采2种方式下CH_4的采气速率和采收率的变化。结果表明,在相同实验条件下,CO_2吸附能力最强,CH_4次之,N_2最弱,N_2解吸能力最强,CH_4次之,CO_2最弱;3种气体的等温解吸曲线相对于等温吸附曲线均存在一定的滞后,CO_2的滞后现象最为明显;降压开采的采收率较低,注CO_2可以有效提高CH_4的采气速率,延长稳产时间,使累计产气量快速增长;在一定注入压力和注入速率范围内,CH_4采收率随着CO_2注入压力和注入速率的增加而增加,但其增加幅度因岩心孔隙度和渗透率的不同而有所不同。

关键词：页岩气藏竞争吸附 CO_2驱吸附能力解吸能力参数优化提高采收率

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