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Journal of Hydrodynamics 2011年第6期23卷 759-766页

作者： zhang lie-hui, guo jing-jing,{2., southwest petroleum University, chengdu 610500, china state key {2. of reservoir geology and exploitation Southwest Petroleum University Chengdu 610500 China

This article presents a new well test model for stress-sensitive composite dual-porosity reservoirs based on the concept of permeability modulus, where the rock and fluid properties as well as the formation thickness vary in the radial direction. An analytical solution in the Laplace space for the pressure-transient behavior for a line-source, constant-rate well of this type of reservoir is obtained with the Laplace transformation and the perturbation technique. The pressure and its derivative in the reservoir and the effects of relevant parameters on the pressure-transient response are obtained. The model as well as the corresponding type curves may be used in predicting the production performance or analyzing the production data for this type of reservoir.

关键词： non-uniform thickness stress-sensitive composite dual-porosity well test model type curve

A NEW WELL TEST MODEL FOR A TWO-ZONE LINEAR COMPOSITE reservoir WITH VARIED THICKNESSES

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Journal of Hydrodynamics 2010年第6期22卷 804-809页

作者： zhang lie-hui guo jing-jing {2. qi-guo state key {2. of reservoir geology and exploitation Southwest Petroleum University Chengdu 610500China

This article presents a new well test model for two-zone linear composite reservoirs, where the rock and fluid properties as well as the formation thicknesses on both sides of the discontinuity are distinctly different. An analytical solution of pressure-transient behavior for a line-source, constant-rate well in this type of reservoir configuration is obtained with Fourier space transformation and Laplace transformation. By applying Duhamel principle, the wellbore storage and skins effects can easily be included. A set of type curves are generated and the sensitivities of the relevant parameters are discussed. A new correlating parameter MhDl√ηD is proposed to identify the pressure response in the pressure derivative curve. The model as well as the corresponding type curves are quite general that they are useful in predicting the production performance or analyzing the production data from this type of well-reservoir systems.

关键词： non-uniform thickness linear composite well test model type curve

WELL TESTING ANALYSIS FOR HORIZONTAL WELL WITH CONSIDERATION OF THRESHOLD PRESSURE GRADIENT IN TIGHT GAS reservoirS

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Journal of Hydrodynamics 2012年第4期24卷 561-568页

作者： guo jing-jing zhang Su zhang lie-hui qiNG Hairuo liu qi-guo state key {2. of Oil and Gas reservoir geology and exploitation Southwest Petroleum UniversityChengdu 610500 China Central Sichuan Mining District PetroChina Southwest Oil and Gas Field Company Suining 629000 China Department of geology University of Regina Regina SK S4S 0A2 Canada

A fundamental solution for homogeneous reservoir in infinite space is derived by using the point source function with the consideration of the threshold pressure gradient. The fundamental solution of the continuous point source function is then derived based on the Green function. Various boundary conditions of the reservoirs are considered for this case and the corresponding solutions are obtained through the mirror image reflection and the principle of superimposition. The line source solution is obtained by integration. Subsequently, the horizontal-well bottom hole pressure response function for a non-linear gas flow in the homogeneous gas reservoir is obtained, and the response curve of the dimensionless bottom hole pressure and the derivative for a horizontal well in the homogeneous gas reservoir are obtained. In the end, the sensitivities of the relevant parameters are analyzed, The well test model presented in this paper can be used as the basis of the horizontal well test analysis for tight gas reservoirs.

关键词： horizontal well non-linear gas flow threshold pressure gradient tight gas reservoir

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考虑滑脱效应的低渗低压气藏的气井产能方程

天然气工业 2009年第1期29卷 76-78页

作者：张烈辉梁斌刘启国熊钰 “油气藏地质及开发工程”国家重点实验室西南石油大学中海石油研究中心

考虑了气体在低渗低压气藏中的滑脱效应,定义了考虑滑脱效应的滑脱表皮系数(S滑脱),建立了形式简洁的气井产能方程。S滑脱介于-1～0之间,即滑脱效应可以增加气井产能。在已知其他参数的条件下,只需计算出S滑脱就可以确定出存在滑脱效应... 详细信息

考虑了气体在低渗低压气藏中的滑脱效应,定义了考虑滑脱效应的滑脱表皮系数(S滑脱),建立了形式简洁的气井产能方程。S滑脱介于-1～0之间,即滑脱效应可以增加气井产能。在已知其他参数的条件下,只需计算出S滑脱就可以确定出存在滑脱效应的气井产能。由于实际气藏往往会表现出其他非线性渗流特征(如启动压力梯度效应和高速非达西效应),因此实际应用时还需要考虑这些因素。现场实例分析表明:对于存在滑脱效应的低渗气藏气井而言,用该新的产能公式计算出的产能大于用常规产能公式计算出的产能,且与实际产能比较吻合,表明了公式的正确性和适用性。

关键词：低渗透油气藏产能评价滑脱效应表皮系数方程

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地热井钻井过程中漏失对井筒温度分布的影响

科学技术与工程 2024年第23期24卷 9819-9826页

作者：张政赵豫王国荣钟林王敬朋西南石油大学油气藏地质及开发工程国家重点实验室成都610500 西南石油大学能源装备研究院成都610500 西南石油大学机电工程学院成都610500

针对地热井钻井过程中经常发生的井漏现象,建立了预测井筒和周围地层温度分布二维瞬态温度模型。采用有限体积法对模型进行离散,使用欠松弛迭代法进行求解;通过与之前建立的井筒温度模型进行对比,验证了本文建立的模型的有效性,得到了... 详细信息

针对地热井钻井过程中经常发生的井漏现象,建立了预测井筒和周围地层温度分布二维瞬态温度模型。采用有限体积法对模型进行离散,使用欠松弛迭代法进行求解;通过与之前建立的井筒温度模型进行对比,验证了本文建立的模型的有效性,得到了地热井裸眼段发生漏失时井筒温度分布规律,分析了影响井筒温度分布的敏感性因素。研究表明,在发生漏失的位置,环空钻井液温度分布曲线发生了明显的突变。井筒内持续性的漏失现象会降低环空与钻杆内的钻井液循环温度,体现了井漏对钻井液的冷却作用,尤其对井底靠近漏失层位的部分井段效果更明显。在钻井液循环相同的时间后,漏失情况下的井口温度和井底温度明显低于正常循环情况下的井口温度和井底温度。裸眼地层段漏失的发生不仅对漏失点以上的井筒温度分布产生了重要影响,也显著影响了漏失点以下的井筒温度分布。

关键词：地热井漏失井筒温度瞬态传热模型敏感性因素分析

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薄层底水油藏部分打开直井试井解释方法研究

西南石油大学学报（自然科学版） 2007年第1期29卷 79-81页

作者：李成勇张烈辉刘启国张燃张圣兵 '油气藏地质及开发工程'国家重点实验室.西南石油大学院四川成都610500 西南油气田分公司输气管理处

底水油藏在我国较为常见,建立了薄层底水油藏瞬时点源扩散方程,利用Lord Kelvin点源解、叠加原理、镜像反应等获得了该类油藏渗流微分方程的基本解,利用Poisson叠加公式简化表达式,结合点源函数的思想求解了薄层底水油藏直井压力响应函... 详细信息

底水油藏在我国较为常见,建立了薄层底水油藏瞬时点源扩散方程,利用Lord Kelvin点源解、叠加原理、镜像反应等获得了该类油藏渗流微分方程的基本解,利用Poisson叠加公式简化表达式,结合点源函数的思想求解了薄层底水油藏直井压力响应函数,计算得到了无因次压力和压力导数双对数理论图版,并在此基础上分析了薄层底水油藏直井渗流特征及其影响因素,编制了试井解释软件。

关键词：薄层底水油藏点源函数渗流特征影响因素试井解释

Petrophysical properties of deep Longmaxi Formation shales in the southern Sichuan Basin, SW china

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petroleum Exploration and Development 2020年第6期47卷 1183-1193页

作者： XU Zhonghua ZHENG Majia liu Zhonghua DENG Jixin LI Xizhe guo Wei LI {2. WANG Nan zhang Xiaowei guo Xiaolong state key {2. of Oil and Gas reservoir geology and exploitation Chengdu University of TechnologyChengdu 610059China College of Geophysics Chengdu University of TechnologyChengdu 610059China Research Institute of petroleum Exploration&Development-Northwest(NWGI) PetroChinaLanzhou 730020China School of Geosciences and Technology Southwest Petroleum UniversityChengdu 610500China Research Institute of Well Logging and Remote Sensing PetroChina Research Institute of Petroleum Exploration&DevelopmentBeijing 100083China Sichuan Basin Research Center PetroChina Research Institute of Petroleum Exploration&DevelopmentBeijing 100083China

Deep shale layer in the Lower Silurian Longmaxi Formation,southern Sichuan Basin is the major replacement target of shale gas exploration in ***,the prediction of"sweet-spots"in deep shale gas reservoirs lacks physical basis due to the short of systematic experimental research on the physical properties of the deep *** on petrological,acoustic and hardness measurements,variation law and control factors of dynamic and static elastic properties of the deep shale samples are *** study results show that the deep shale samples are similar to the middle-shallow shale in terms of mineral composition and pore *** characteristics of organic-rich shale samples(TOC>2.)indicate that these shale samples have a framework of microcrystalline quartz grains;the intergranular pores in these shale samples are between rigid quartz grains and have mechanical property of hard *** lean-organic shale samples(TOC2.),with quartz primarily coming from terrigenous debris,feature plastic clay mineral particles as the support frame in rock *** pores in these samples are between clay particles,and show features of soft pores in mechanical *** difference in microtexture of the deep shale samples results in an asymmetrical inverted V-type change in velocity with quartz content,and the organic-rich shale samples have a smaller variation rate in velocity-porosity and velocity-organic matter *** due to the difference in microtexture,the organic-rich shale and organic-lean shale can be clearly discriminated in the cross plots of P-wave impedance versus Poisson’s ratio as well as elasticity modulus versus Poisson’s *** shale samples with quartz mainly coming from biogenic silica show higher hardness and brittleness,while the shale samples with quartz from terrigenous debris have hardness and brittleness less affected by quartz *** study results can provide a basis for well-logging interpretation and"sweet

关键词： southern Sichuan Basin Silurian deep Longmaxi Formation shale rock physical properties elasticity velocity

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低渗透气藏水平井产能计算新公式

特种油气藏 2011年第5期18卷 71-74,139页

作者：刘启国蒋艳芳张烈辉油气藏地质及开发工程国家重点实验室西南石油大学四川成都610500

低渗透气藏由于储层的特殊性,常出现应力敏感、启动压力梯度、高速非达西效应等现象。因此,在低渗透气藏水平井产能分析时,应该考虑这些因素的影响。通过保角变换方法,推导得到同时考虑高速非达西效应、应力敏感和启动压力梯度的低渗透... 详细信息

低渗透气藏由于储层的特殊性,常出现应力敏感、启动压力梯度、高速非达西效应等现象。因此,在低渗透气藏水平井产能分析时,应该考虑这些因素的影响。通过保角变换方法,推导得到同时考虑高速非达西效应、应力敏感和启动压力梯度的低渗透气藏水平井产能新公式。研究结果表明:高速非达西效应、应力敏感、启动压力梯度将使低渗透气藏水平井产量减小;在同一井底压力下,随着应力敏感系数、启动压力梯度的增加,水平井产量降低。该公式对应力敏感性较强的低渗透气藏的开发具有重要的指导意义。

关键词：低渗透气藏水平井产能公式推导高速非达西效应应力敏感启动压力梯度保角变换

Gas channeling control with an in-situ smart surfactant gel during water-alternating-CO_(2. enhanced oil recovery

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petroleum Science 2023年第5期20卷 2835-2851页

作者： Xin-Jie Luo Bing Wei Ke Gao Bo jing Bo Huang Ping guo Hong-Yao Yin Yu-Jun Feng Xi {2. Polymer Research Institute State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065SichuanChina National key laboratory of Oil and Gas {2. geology and exploitation Southwest Petroleum UniversityChengdu 610500SichuanChina National key laboratory of Offshore Oil {2. CNOOC Research Institute Ltd.Beijing 102209China

Undesirable gas channeling always occurs along the high-permeability layers in heterogeneous oil reservoirs during water-alternating-CO_(2.(WAG)flooding,and conventional polymer gels used for blocking the“channeling”paths usually suffer from either low injectivity or poor gelation ***,we for the first time developed an in-situ high-pressure CO_(2.-triggered gel system based on a smart surfactant,N-erucamidopropyl-N,N-dimethylamine(UC2.AMPM),which was introduced into the aqueous slugs to control gas channeling inWAG *** water-like,low-viscosity UC2.AMPM brine solution can be thickened by high-pressure CO_(2. owing to the formation of wormlike micelles(WLMs),as well as their growth and shear-induced structure buildup under shear *** thickening power can be further potentiated by the generation of denser WLMs resulting from either surfactant concentration augmentation or a certain range of heating,and can be impaired via pressurization above the critical pressure of CO_(2. because of its soaring solvent *** flooding tests using heterogeneous cores demonstrated that gas channeling was alleviated by plugging of high-capacity channels due to the in-situ gelation of UC2.AMPM slugs upon their reaction with the pre-or post-injected CO_(2. slugs under shear flow,thereupon driving chase fluids into unrecovered low-permeability areas and producing an 8.0% higher oil recovery factor than the conventional WAG *** smart surfactant enabled high injectivity and satisfactory gelation control,attributable to low initial viscosity and the combined properties of one component and CO_(2.-triggered gelation,*** work could provide a guide towards designing gels for reducing CO_(2. spillover and reinforcing the CO_(2. sequestration effect during CO_(2. enhanced oil recovery processes.

关键词： CO_(2.flooding Enhanced oil recovery Gas channeling Water-alternating-CO_(2. Smart surfactant Gel

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

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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 {2. 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