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Biogas charging and dissipating process and its accumulation in the Sebei gasfield,Qaidam Basin,China

Science China Earth Sciences 2008年第S1期51卷 36-44页

作者： JIN Qiang 1,CHENG FuQi 1,2 ,SU AiGuo 3.,ZHU GuangYou 3.,WANG Li 1 &CAO Qian 1 1 China University of Petroleum,dongying,shandong 257061,China 2.geological institute of shengli oilfield,{3.,dongying,shandong 2.7015,China 3.Petroleum Exploration and Development institute,PetroChina,Beijing 100083.China China University of Petroleum Dongying China geological institute of shengli {3. SINOPEC Dongying China Petroleum Exploration and Development institute PetroChina Beijing China

The Sebei gasfield is the largest biogas accumulation found in China and many reservoirs and seal rocks superposed on a syndepositional anticline in *** biogas charging and dissipating process and its distribution have been a research focus for many *** authors suggest a diffusing and accumulating model for the biogas,as they find that the shallower the gas producer,the more methane in the biogas,and the lighter stable carbon isotope composition of *** on the diffusing model,diffused biogas is quantitatively estimated for each potential sandy reservoir in the gasfield,and the gas charging quantity for the sandy reservoir is also calculated by the diffused gas quantity plus gas reserve in-place.A ratio of diffusing quantity to charging quantity is postulated to describe biogas accumulating state in a sandy reservoir,if the ratio is less than 0.6,the reservoir forms a good gas-pool and high-production layer in the gasfield,which often occurs in the reservoirs deeper than 900 m;if the ratio is greater than 0.6,a few gas accumulated in the reservoir,which frequently exists in the reservoirs shallower than 900 ***,a biogas accumulation model is built up as lateral direct charging from gas source for the sands deeper than 900 m and indirect charging from lower gas-bearing sands by diffusion at depth shallower than 900 *** this charging and diffusion quantitative model,the authors conducted re-evaluation on each wildcat in the central area of the Qaidam Basin,and found many commercial biogas layers.

关键词： biogas charging and diffusing model relative dissipated quantity Qaidam Basin

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Conditions for the Formation of Oil and Gas Pools in Tertiary Volcanics in the Western Part of the Huimin Sag, shandong and Their Distribution

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Acta Geologica Sinica(English Edition) 1989年第1期63卷 23-37页

作者： Liu Zerong and Xin Quanlin East China Petroleum institute, dongying, shandong Wang Yongjie, Xu Piqin and Zhang Xiaofeng {3. oilfield, dongying, shandong Yang Shuren East China Petroleum institute Dongying Shandong China

Conditions for the Formation of oil and gas pools in Tertiary volcanics in the western part of the Huimin sag, shandong and then (?)stribution have been studied based on the geological, seismic and well-logging information. In this paper, the types and lithofacies of the volcanic rocks in the western part of the Huimin sag are described; the relationship between rocks and electrical properties, the seismic reflection structures, the development and distribution of the volcanic rocks are expounded; and the fourfold role of the volcanic activities in the formation of the oil and gas pools is also dealt with. It is considered by the authors that the volcanic activities were not destructive to the formation of oil and gas pools but a factor favourable to the accumulation of organic matters and their conversion to hydrocarbon. The volcanic rocks might have served as reservoir rocks and cap rocks, or as a synsedimentary anticline. The prerequisites and important factors for the formation of oil and gas pools and their distribution are pointed out in the paper.

关键词： Conditions for the Formation of Oil and Gas Pools in Tertiary Volcanics in the Western Part of the Huimin Sag

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Molecular dynamics study of the water/n-alkane interface

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Science China Chemistry 2010年第4期53卷 945-949页

作者： XIAO HongYan1, ZHEN Zhen1, SUN HuanQuan2, CAO XuLong2, LI ZhenQuan2, SONG XinWang2, CUI XiaoHong2 & LIU XinHou1 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China 2institute of geological Science, {3. oilfield, dongying 257001, China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China institute of geological Science Shengli Oilfield Dongying China

Molecular dynamics simulations on the interface between liquid water and liquid n-alkane (including octane, nonane, decane, undecane and dodecane) have been performed with the purpose to study the interfacial properties: (Ⅰ) density profile; (Ⅱ) molecular orientation; (Ⅲ) interfacial tension and the temperature effect on the interfacial tension. Simulation results show that at the interface the structures of both water and n-alkane are different from those in the bulk. Water has an orientational preference due to the number of hydrogen bonds per molecule maximized. N-alkane has a more lateral orientation with respect to the interface in order to be in close contact with water. The calculated individual phase bulk density and interfacial tension of water/n-alkane systems are in good agreement with the corresponding experimental ones.

关键词： molecular dynamics water/n-alkane interface interfacial tension

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THE PRESSURE TRANSIENT ANALYSIS OF DEFORMATION OF FRACTAL MEDIUM

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Journal of Hydrodynamics 2008年第3期20卷 306-313页

作者： ZHANG Yi-gen TONG Deng-ke institute of Mechanics Chinese Academy of Sciences Beijing 100080 China Research institute of geological Sciences Shengli Oilfield Company Sinopec Dongying 257015 China School of Mathematics and Computational Sciences China University of Petroleum （East China） Dongying257061 China

The assumption of constant rock properties in pressure-transient analysis of stress-sensitive reservoirs can cause significant errors in the estimation of temporal and spatial variation of pressure. In this article, the pressure transient response of the fractal medium in stress-sensitive reservoirs was studied by using the self-similarity solution method and the regular perturbation method. The dependence of permeability on pore pressure makes the flow equation strongly nonlinear. The nonlinearities associated with the governing equation become weaker by using the logarithm transformation. The perturbation solutions for a constant pressure production and a constant rate production of a linear-source well were obtained by using the self-similarity solution method and the regular perturbation method in an infinitely large system, and inquire into the changing rule of pressure when the fractal and deformation parameters change. The plots of typical pressure curves were given in a few cases, and the results can be applied to well test analysis.

关键词： stress-sensitive reservoir fractal permeability modulus pressure analysis

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Numerical simulation of the blocking process of gelled particles in porous media with remaining polymers

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Petroleum Science 2009年第3期6卷 284-288页

作者： Feng Qihong Zhang Ge Yin Xiaomei Luan Zhiyong School of Petroleum Engineering China University of Petroleum Dongying Shandong 257061 China Oil Production Research institute Shengli Oilfield Company Sinopec Dongying Shandong 257000 China

Gelled particles can be transferred deeply inside oil reservoirs to block water channels due to their physicochemical characteristics, including swelling, deformation, and synergetic effect （reacting with polymers）, and then the injection profiles are significantly modified. At present, research on gelled particles is mainly focused on laboratory studies of drive mechanisms, and rarely on mathematical models describing the blocking process of gelled particles. In this paper, the blocking process of gelled particles is divided into two sub-processes： deposition and desorption due to particle deformation. A mathematical model based on filtration theory is proposed considering the effect of characteristics of gelled particles on the blocking process. Blocking laws were simulated and researched using the mathematical model. Results of the simulation of the blocking of gelled particles are quite consistent with the experimental results, which confirms the reliability of the mathematical model developed.

关键词： Gelled particles profile control blocking process numerical simulation swelling synergetic effect deformation

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Quantitative description of characteristics of high-capacity channels in unconsolidated sandstone reservoirs using in situ production data

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Petroleum Science 2010年第1期7卷 106-111页

作者： Wang Xuezhong Wang Jianyong Wang Chuanfei Zeng Liufang Liu Xuewei Xinjiang Exploration ＆ Production Center Shengli Oilfield Company Sinopec Dongying Shandong 257000 China sinopec Beijing 100728 China China University of Petroleum Dongying Shandong 257061 China Gudong Oil Production Plant Shengli Oilfield Company Sinopec Dongying Shandong 257237 China institute of Porous Flow ＆ Fluid Mechanics CNPC ＆ Chinese Academy of Sciences Langfang Hebei 065007 China

Quantitative description of the high-capacity channels in unconsolidated sandstone reservoirs, into which water was injected to improve oil recovery, is a hot topic in the field of reservoir development. This paper presents a novel approach to describing quantitatively the characteristics of connected macropores in unconsolidated sandstone reservoirs using in situ production data. Based on physical simulation for formation mechanisms of high capacity channels and interwell tracer test data, a mathematical model was established to describe high-capacity channels by grey correlation theory, flow mechanism of fluid in porous media and reservoir engineering, and a program was developed to describe quantitatively the channel characteristics. The predicted results were consistent with field monitoring data （80%）, so this model could be economically and effectively used to identify high-capacity channels.

关键词： High-capacity channel unconsolidated sandstone quantitative description physical simulation interwell tracer grey correlation theory

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UNSTEADY FLOW OF NON-NEWTONIAN VISCO-ELASTIC FLUID IN DUAL-POROSITY MEDIA WITH THE FRACTIONAL DERIVATIVE

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Journal of Hydrodynamics 2009年第5期21卷 705-713页

作者： SHAN Lian-tao TONG Deng-ke XUE Li-li School of Petroleum Engineering China University of Petroleum Dongying 257061 China Research institute of geological Sciences Shengli Oilfield Company Sinopec Dongying 257015 School of Mathematics and Computational Sciences China University of Petroleum Dongying 257061 China

The fractional order derivative was introduced to the seepage flow research to establish the relaxation models of non-Newtonian viscoelastic fluids in dual porous media. The flow characteristics of non-Newtonian viscoelastic fluids through a dual porous medium were studied by using the Hankel transform, the discrete Laplace transform of sequential fractional derivatives and the generalized Mittag-Leffler function. Exact solutions were obtained for arbitrary fractional order derivative. The long-time and short-time asymptotic solutions for an infinite formation were also resulted. The pressure transient behavior of non-Newtonian viscoelastic fluids flow through an infinite dual porous media was studied by using Stehfest＇s inversion method of the numerical Laplace transform. It shows that the characteristics of the fluid flow are appreciably affected by the order of the fractional derivative.

关键词： fractional calculus non-Newtonian visco-elastic fluids dual porous media exact solution

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胜利油田滩海区窄河道薄层底水油藏注采井网优化

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新疆石油地质 2011年第5期32卷 515-517页

作者：翟亮中国石化胜利油田有限责任公司地质科学研究院山东东营257015

胜利油田滩海老168区块油藏储集层属薄层河道砂,普遍存在底水,水驱控制程度低,单井产量和采收率较低。在建立区块典型河道模型基础上,利用流线模型优化注采井网,指导区块的注采井网设计,投产后利用实际生产含水数据并结合端点标定技术,... 详细信息

胜利油田滩海老168区块油藏储集层属薄层河道砂,普遍存在底水,水驱控制程度低,单井产量和采收率较低。在建立区块典型河道模型基础上,利用流线模型优化注采井网,指导区块的注采井网设计,投产后利用实际生产含水数据并结合端点标定技术,重新修正地质模型,优化关键生产参数,为该类油田的合理高效开发提供科学依据。

关键词：窄河道薄层底水井网优化流线模拟端点标定

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河流相地层波阻抗特征及其控制因素

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石油与天然气地质 2004年第5期25卷 524-527页

作者：林会喜中国地质大学

利用油、水基泥浆测井资料 ,根据沉积学原理、声波传播机理系统分析了砂泥岩剖面各类岩性测井声阻抗、真实波阻抗变化特征及其控制因素。河流相地层测井声阻抗受钻井泥浆的影响较大 ,在水基泥浆条件下 ,由于含泥质地层的蚀变以及井眼跨... 详细信息

利用油、水基泥浆测井资料 ,根据沉积学原理、声波传播机理系统分析了砂泥岩剖面各类岩性测井声阻抗、真实波阻抗变化特征及其控制因素。河流相地层测井声阻抗受钻井泥浆的影响较大 ,在水基泥浆条件下 ,由于含泥质地层的蚀变以及井眼跨塌 ,往往导致测井波阻抗反演时的不匹配或假象。地层真实的波阻抗则主要受泥质含量控制。当泥质含量等于该套地层的最大有效孔隙度时 ,其波阻抗值最大。一般而言 ,泥质砂岩、砂质泥岩的波阻抗值较大 ,泥岩波阻抗值较小 ,而砂岩介于两者之间。

关键词：声波时差岩石密度波阻抗泥质含量测井约束反演

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Application of High-Resolution Sequence Stratigraphy to Precise Lacustrine Reservoir Correlations with an example from Linpan Oil Fleld,China

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沉积学报 1998年第2期 34-41页

作者： Jiang Zaixing1\ Cao Yingchang1\ Chang Lin1\ Ye Lianjun2 Li Renwei2Zhou Xiangquan 3. Zhang Yong 3. Wang Ximing 3. Du Yumin 3.1(Dept.of Petroleum Resources Sciences,dongying,shandong\ 257062) 2.geological {3.,Chinese Academy of Science

１ＩＮＴＲＯＤＵＣＴＩＯＮＨｉｇｈ－ｒｅｓｏｌｕｔｉｏｎｓｅｑｕｅｎｃｅｓｔｒａｔｉｇｒａｐｈｉｃｔｅｃｈ－ｎｉｑｕｅｈａｓｓｕｃｃｅｓｓｆｕｌｙｂｅｅｎｕｓｅｄｔｏｐｒｅｄｉｃｔｍａｒｉｎｅａｎｄｄｅｌｔａｉｃｒｅ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＨｉｇｈ－ｒｅｓｏｌｕｔｉｏｎｓｅｑｕｅｎｃｅｓｔｒａｔｉｇｒａｐｈｉｃｔｅｃｈ－ｎｉｑｕｅｈａｓｓｕｃｃｅｓｓｆｕｌｙｂｅｅｎｕｓｅｄｔｏｐｒｅｄｉｃｔｍａｒｉｎｅａｎｄｄｅｌｔａｉｃｒｅｓｅｒｖｏｉｒｓｓｉｎｃｅ１９９０...

关键词： Lake level change\ Sequence stratigraphy\ Reservoir Correlation

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