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Controlling Factors Affecting Pressure Differential Development of the Upper Paleozoic Gas Reservoir in the Sulige and Yulin Area of the Ordos Basin

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地学前缘 2009年第S1期16卷 126-127页

作者： Hao Xu~1,Junfeng Zhang~2.Chengzao Jia~3,Dazhen Tang~1,Ming Li~3,Wenzhong Zhang~1 1.Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism,Ministry of Education,china University of Geosciences(beijing),beijing 100083,china. 2.Petrochina exploration and production Company,beijing 10072.,china 3.research institute of {12. exploration & Development,beijing 100083,china

The origin and distribution of Upper Paleozoic reservoirs pressure in mid-northem Ordos Basin has attracted widespread attention in recent *** reservoir pressure of Sulige area shows characteristics of basically subnormal pressure,and the reservoir pressure of Yulin area shows characteristics of basically normal hydrostatic *** the sense of structural location,

关键词： Ordos Basin Sulige area Yulin area formation pressure controlling factors

Hydrocarbon test in lower-layer atmosphere to predict deep-sea petroleum or hydrate in the Okinawa Trough: an example

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Acta Oceanologica Sinica 2003年第4期22卷 569-576页

作者： Gong Jianming1, Chen Jianwen 1, 2. Li Gang1, Zhang Xunhua1, Li Jipeng3, Huang Fulin1 1. Qingdao institute of Marine Geology, Qingdao 2.6071, china. 2. Ocean University of china, Qingdao 2.6003, china 3. Hefei institute of petroleum Chemical exploration, china petroleum exploration and Development research institute, Hefei 2.002.,{12. Qingdao institute of Marine Geology Qingdao 266071 China Ocean University of china Qingdao 266003 China Hefei Inst. petroleum Chem. Explor. China Petroleum Explor./Devmt. Res. Hefei 230022 China

Light hydrocarbon (methane, ethane, propane, butane and CO2. test and C isotopic analysis of CO are conducted for over 100 lower-layer atmospheric samples from the East china Sea slope and the Okinawa Trough. The results show that the lower-layer atmosphere mainly consists of CO2.and then of CH4, and the CO2.concentrations are calculated to have a high average value of 0.87 omega/10(-2. about three times that of the regional background (0-3 omega/10(-2.). The result also shows that the average value of C isotope - 2..8 x 10(-3) is given to the CO2. inferring that it is inorganic gas. Thus, for the future 's work in the Okinawa Trough, special attention should be paid to CO2.hydrate, which is very possibly an important hydrate type.

关键词： lower-layer atmosphere hydrocarbon test C isotopic analysis deep-sea petroleum gas hydrate

Numerical simulation of pore-scale flow in chemical flooding process

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Theoretical & Applied Mechanics Letters 2011年第2期1卷 68-72页

作者： Xiaobo Li,~(1,a) Shuhong Wu,~1 Jie Song,~1 Hua Li,~1 and Shuping Wang~2.1.research institute of {2. exploration & Development of Petrochina,beijing 100083,china 2.{2. exploration & production research institute of sinopec,beijing 100083,china Petrochina Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China sinopec Petr Explorat & Prod Res Inst Beijing 100083 Peoples R China

Chemical flooding is one of the effective technologies to increase oil recovery of petroleum reservoirs after water *** the scale of representative elementary volume(REV), phenomenological modeling and numerical simulations of chemical flooding have been reported in literatures,but the studies alike are rarely conducted at the pore-scale,at which the effects of physicochemical hydrodynamics are hardly resolved either by experimental observations or by traditional continuum-based *** this paper,dissipative particle dynamics(DPD),one of mesoscopic fluid particle methods,is introduced to simulate the pore-scale flow in chemical flooding *** theoretical background,mathematical formulation and numerical approach of DPD are *** plane Poiseuille flow is used to illustrate the accuracy of the DPD simulation,and then the processes of polymer flooding through an oil-wet throat and a water-wet throat are studies, *** selected parameters of those simulations are given in *** preliminary results show the potential of this novel method for modeling the physicochemical hydrodynamics at the pore scale in the area of chemical enhanced oil recovery.

关键词： chemical flooding pore-scale flow dissipative particle dynamics mesoscopic simulation enhanced oil recovery

Effect of stress sensitivity on displacement efficiency in CO_2.flooding for fractured low permeability reservoirs

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petroleum Science 2009年第3期6卷 277-283页

作者： Wang Rui Yue Xiang＇an Zhao Renbao Yan Pingxiang Dave Freeman Key Laboratory of petroleum Engineering Ministry of Education China University of Petroleum Beijing 102249 China sinopec exploration ＆ {2. research institute Beijing 100083 China china Power Complete Equipment Co. Ltd. Beijing 100011 China Edwy R. Brown Department of petroleum Engineering Marietta College U.S.A.

Carbon dioxide flooding is an effective means of enhanced oil recovery for low permeability reservoirs. If fractures are present in the reservoir, CO2.may flow along the fractures, resulting in low gas displacement efficiency. Reservoir pore pressure will fluctuate to some extent during a CO2.flood, causing a change in effective confining pressure. The result is rock deformation and a reduction in permeability with the reduction in fracture permeability, causing increased flow resistance in the fracture space. Simultaneously, gas cross flowing along the fractures is partially restrained. In this work, the effect of stress changes on permeability was studied through a series of flow experiments. The change in the flowrate distribution in a matrix block and contained fracture with an increase in effective pressure were analyzed. The results lead to an implicit comparison which shows that permeability of fractured core decreases sharply with an increase in effective confining pressure. The fracture flowrate ratio declines and the matrix flowrate ratio increases. Fracture flow will partially divert to the matrix block with the increase in effective confining pressure, improving gas displacement efficiency.

关键词： Stress sensitivity flowrate distribution matrix fracture CO2.flooding displacement efficiency

Numerical simulation of predicting and reducing solid particle erosion of solid-liquid two-phase flow in a choke

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petroleum Science 2009年第1期6卷 91-97页

作者： Li Guomei Wang Yueshe He Renyang Cao Xuewen Lin Changzhi Meng Tao State Key Laboratory of Multiphase Flow in Power Engineering Xi＇an Jiaotong University Xi＇an Shaanxi 710049 China china Special Equipment Inspection and research {2. Beijing 100013 China School of Transport ＆ Storage and Civil Engineering China University of Petroleum Qingdao Shandong 266555 China petroleum exploration and {2. research institute Sinopec Beijing 100083 China

Chokes are one of the most important components of downhole flow-control equipment. The particle erosion mathematical model, which considers particle-particle interaction, was established and used to simulate solid particle movement as well as particle erosion characteristics of the solid-liquid two-phase flow in a choke. The corresponding erosion reduction approach by setting ribs on the inner wall of the choke was advanced. This mathematical model includes three parts： the flow field simulation of the continuous carrier fluid by an Eulerian approach, the particle interaction simulation using the discrete particle hard sphere model by a Lagrangian approach and calculation of erosion rate using semiempirical correlations. The results show that particles accumulated in a narrow region from inlet to outlet of the choke and the dominating factor affecting particle motion is the fluid drag force. As a result, the optimization of rib geometrical parameters indicates that good anti-erosion performance can be achieved by four ribs, each of them with a height （H） of 3 mm and a width （B） of 5 mm equaling the interval between ribs （L）.

关键词： Solid-liquid two-phase flow discrete particle hard sphere model choke erosion rate antierosion numerical simulation

The productivity evaluation model and its application for finite conductivity horizontal wells in fault block reservoirs

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petroleum Science 2010年第4期7卷 530-535页

作者： Jiang Hanqiao Ye Shuangjiang Lei Zhanxiang Wang Xing Zhu Guojin Chen Minfeng Key Laboratory of petroleum Engineering Ministry of Education China University of Petroleum Beijing 102249 China research institute of {2. exploration and Development PetroChina Beijing 100083 China research institute of{2. National Offshore Oil Corporation Beijing 100027 China

It is very difficult to evaluate the productivity of horizontal wells in fault block reservoirs due to the influence of fault *** the basis of the method of images and source-sink theory,a semianalytical model coupling reservoir and finite conductivity horizontal wellbore flow dynamics was built,in which the influence of fault sealing was taken into *** distribution of wellbore flow and radial inflow profiles along the horizontal interval were also *** impact of the distance between the horizontal well and the fault on the well productivity was quantitatively *** on this analysis,the optimal distance between the horizontal well and the fault in banded fault block reservoirs could be *** to the field application,the relative error calculated by the model proposed in this paper is within ±15%.It is an effective evaluation method for the productivity of horizontal wells in fault block *** productivity of the horizontal well increases logarithmically as the distance between the horizontal well and the fault *** optimal distance between the horizontal well and the fault is 0.2.-0.3 times the horizontal well length.

关键词： Fault block reservoir horizontal well finite conductivity productivity evaluation well location design

Prediction of petroleum exploration risk and subterranean spatial distribution of hydrocarbon accumulations

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petroleum Science 2011年第1期8卷 17-23页

作者： Xie Hongbing Guo Qiulin Li Feng Li Jianzhong Wu Na Hu Suyun Liang Kun School of Energy Resources China University of GeosciencesBeijing 100083China research institute of {2. exploration ＆ Development PetroChinaBeijing 100083China Science ＆ Technology Management Department China National Petroleum CorporationBeijing 100007China

Investigation of spatial distribution of oil and gas resource and accurate prediction of the geographic location of its undiscovered resource is significant for reducing exploration risk and improving exploration benefit.A new method for predicting spatial distribution of oil resource is discussed in this *** consists of prediction of risk probability in {2. exploration and simulation of hydrocarbon abundance. exploration risk probability is predicted by multivariate statistics,fuzzy mathematics and information processing techniques.A spatial attribute database for sample wells was set up and the Mahalanobis distance and Fuzzy value of given samples were ***,the Bayesian formula was used to calculate the hydrocarbon-bearing probability at the area of exploration ***,a hydrocarbon probability template is formed and used to forecast the probability of the unknown area. The hydrocarbon abundance is simulated based on Fourier integrals,frequency spectrum synthesis and fractal ***,the fast Fourier transformation（FFT） is used to transform the known hydrocarbon abundance from the spatial domain to the frequency domain,then,frequency spectrum synthesis is used to produce the fractal frequency spectrum,and FFT is applied to get the phase information of hydrocarbon-bearing ***,the frequency spectrum simulation is used to calculate the renewed hydrocarbon abundance in the play. This method is used to predict the abundance and possible locations of the undiscovered {2. accumulations in the Nanpu Sag of the Bohai Bay Basin,*** prediction results for the well-explored onshore area of the northern Nanpu Sag agree well with the actual *** the less-explored offshore areas in the southern Nanpu Sag,the prediction results suggest high hydrocarbon abundance in Nanpu-1 and Nanpu-2.providing a useful guiding for future exploration.

关键词： Hydrocarbon resources abundance risk forecast Nanpu sag frequency spectrum simulation fractal theory

MESOZOIC petroleum SUPERSYSTEM IN NORTH china

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石油勘探与开发 1996年第6期23卷 85-92页

作者： Niu Jiayu Li Jinchao Xue Liangqing(research institute of {2. exploration and Development, CNPC, beijing, 100083, china)

ＭＥＳＯＺＯＩＣ　ＰＥＴＲＯＬＥＵＭ　ＳＵＰＥＲＳＹＳＴＥＭ　ＩＮ　ＮＯＲＴＨ　ＣＨＩＮＡＭＥＳＯＺＯＩＣＰＥＴＲＯＬＥＵＭＳＵＰＥＲＳＹＳＴＥＭＩＮＮＯＲＴＨＣＨＩＮＡ￥ＮｉｕＪｉａｙｕ；ＬｉＪｉｎｃｈａｏ；Ｘｕｅ... 详细信息

ＭＥＳＯＺＯＩＣ　ＰＥＴＲＯＬＥＵＭ　ＳＵＰＥＲＳＹＳＴＥＭ　ＩＮ　ＮＯＲＴＨ　ＣＨＩＮＡＭＥＳＯＺＯＩＣＰＥＴＲＯＬＥＵＭＳＵＰＥＲＳＹＳＴＥＭＩＮＮＯＲＴＨＣＨＩＮＡ￥ＮｉｕＪｉａｙｕ；ＬｉＪｉｎｃｈａｏ；ＸｕｅＬｉａｎｇｑｉｎｇ（Ｒｅｓｅａｒｃ...

关键词： Mesozoic era Oil resource Oil and gas exploration Regional tectonic Palaeoclimate North china petroleum supersystem

A Study of Sedimentary Environment and Reservoir Quality of the Carboniferous Donghe Sandstonein the Tarim Basin

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Acta Geologica Sinica(English Edition) 1996年第4期70卷 395-406,454页

作者： Gu Jiayuresearch institute of {2. exploration and Development, beijing research institute of {2. exploration and Development Beijing

Very thick, fine-grained quartzose sandstone of the Lower Carboniferous (called the Donghe sandstone) was discovered in Donghe-1 well in the Tarim basin. Highly-productive commercial oil and gas flows were obtained when a well completion test was conducted. This important discovery proved that the quartzose sandstone is a prospecting target with good prospects. After that, other two paying oil and gas flows were found in the Lower Carboniferous in the Tazhong-4 and Tazhong-10 structures (Tazhong means central Tarim), equivalent to the Donghe sandstone. The Tazhong-4 structural oil field is the biggest oil field ever discovered. Therefore it is of guiding importance in oil and gas exploration to deepen the study of sedimentary and reservoir features and the sedimentary environment of the Donghe sandstone and to build a sedimentary model in order to understand the reservoir distribution pattern.

关键词： Donghe sandstone sedimentary facies sedimentary model tempestite pore type dissolved pore