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THE TERRESTRIAL TRIASSIC-JURASSIC BOUNDARY IN THE JUNGGAR BASIN,XINJIANG,NORTHWEST china——SUGGESTION ON GEOCHEMICAL,PALAEOBOTANICAL AND PALYNOLOGICAL EVIDENCES

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THE TERRESTRIAL TRIASSIC-JURASSIC BOUNDARY IN THE JUNGGAR BA...

developmental modes of the Neoproterozoic-Lower Paleozoic marine hydrocarbon source rocks in china

侏罗系界限及地质事件国际学术研讨会

作者： Shenghui DENG Yuanzheng LU Research institute of petroleum exploration & development(RIPED) petrochina beijing 100083 china

＜正＞The terrestrial Triassic and Jurassic strata are successionally developed in some basins of china, of which the Junggar basin, Xinjiang, Northwest china is the representative one.

关键词： terrestrial strata Triassic-Jurassic boundary Junggar basin organic carbon isotope macroplant spore-pollen

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Science Bulletin 2007年第S1期 77-91页

作者： ZHANG BaoMin1, ZHANG ShuiChang1, BIAN LiZeng2, JIN ZhiJun3 & WANG DaRui1 1 Research Center of petroleum Geology in Research institute of petroleum exploration and development, petrochina, beijing 100083, china 2 Department of Earth Sciences, Nanjing University, Nanjing 210093, china 3 Research institute of petroleum exploration and development, Sinopec, beijing 100083, china

Based on the researches on rock type, the mode of occurrence, diagnostic minerals and creatures, the sedimentary geochemistry and organic facies of Chinese marine source rocks from wells and outcrops, and on the research findings of developmental modes of foreign marine source rock, the authors consider that it is impossible to objectively make clear the formation mechanism of hydrocarbon source rock with high organic matter abundance by either single mode of preservation or high organic matter productivity. According to the Chinese geological features, the formation mechanism of the Neoproterozoic-Lower Paleozoic marine source rock is generalized into four modes, namely, thermal water activity-upwelling flow-anoxic; carbonate gentle slope-upwelling flow; xerothermic climate-brine euxinic milieu; and humid climate-retained euxinic milieu; as the Lower Cambrian undercompensation basin organic facies (the Tarim Basin, South china and southwestern margin of North china), carbonate gentle lime mud bound organic facies (the Upper Ordovician in Tazhong region of the Tarim Basin and the Lower Silurian in the Upper Yangtze Platform), the Middle Cambrian evaporation laggon organic facies (the Tarim Basin and the Upper Yangtze Platform), enclosed undercompensation terrigenous bay organic facies (the Middle-Upper Ordovician in the west of the Tarim Basin, the Lower Silurian Longmaxi Formation in the Upper Yangtze platform). Chinese marine sedimentations with lower organic matter abundance are generalized into two modes of consumption-dilution mode of open epicontinental sea and depletion-dilution mode of supercompensation basin.

关键词： marine source rock upwelling flow anoxic event thermal water activity xerothermic climate-brine euxinic humid climate-retained euxinic

Diagenesis and Restructuring Mechanism of Oil and Gas Reservoir in the Marine Carbonate Formation,Northeastern Sichuan:A Case Study of the Puguang Gas Reservoir

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Acta Geologica Sinica(English Edition) 2009年第6期83卷 1173-1181页

作者： DU Chunguo1, 2, WANG Jianjun1, ZOU Huayao2, ZHU Yangming3 and WANG Cunwu4 1 Research institute of petroleum exploration and development, beijing 100034, china 2 petroleum University of china, beijing 102249, china 3 Department of Earth Science, Zhejiang University, Hangzhou 310027, china 4 Faculty of Earth Resources, china University of Geosciences, Wuhan 430074, china Faculty of Earth Resources China University of Geosciences Wuhan 430074 China

Based on the technology of balanced cross-section and physical simulation experiments associated with natural gas geochemical characteristic analyses, core and thin section observations, it has been proven that the Puguang gas reservoir has experienced two periods of diagenesis and restructuring since the Late Indo-Chinese epoch. One is the fluid transfer controlled by the tectonic movement and the other is geochemical reconstruction controlled by thermochemical sulfate reduction (TSR). The middle Yanshan epoch was the main period that the Puguang gas reservoir experienced the geochemical reaction of TSR. TSR can recreate the fluid in the gas reservoir, which makes the gas drying index higher and carbon isotope heavier because C2+ (ethane and heavy hydrocarbon) and 12C (carbon 12 isotope) is first consumed relative to CH4 and 13C (carbon 13 isotope). However, the reciprocity between fluid regarding TSR (hydrocarbon, sulfureted hydrogen (H2S) , and water) and reservoir rock results in reservoir rock erosion and anhydrite alteration, which increases porosity in reservoir, thereby improving the petrophysical properties. Superimposed by later tectonic movement, the fluid in Puguang reservoir has twice experienced adjustment, one in the late Yanshan epoch to the early Himalayan epoch and the other time in late Himalayan epoch, after which Puguang gas reservoir is finally developed.

关键词： diagenesis and restructuring mechanism marine carbonate formation thermochemical sulfate reduction Puguang gas reservoir

Relations between spatial distribution and sequence types of the Cambrian-Ordovician marine source rocks in Tarim Basin

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Science Bulletin 2007年第S1期 92-102页

作者： GAO ZhiYong, ZHANG ShuiChang, ZHANG XingYang & ZHU RuKai Experiment & Research Center of petroleum Geology, Research institute of petroleum exploration and development, petrochina, beijing100083, china

Marine source rocks are considered to be mainly composed of the Cambrian-Ordovician deposit in Tarim Basin. Based on the previous studies made by other researchers, the authors calculated the thickness and distribution scale of these Cambrian-Ordovician source rocks by integrating sequence stratigraphy with investigations on sedimentary environments, well-shooting demarcating and calibrating the thickness of unknown source rocks with the thickness of the known ones according to characteristics of the source rocks that have "double track" seismic lineup reflectance. The results showed that the distribution area of the Lower-Cambrian Yuertusi Fm. source rock in platform inner depressions, slopes and deep basins is much bigger than that of the Middle Cambrian evaporite-lagoon source rock. Moreover, the former is superior to the latter in terms of the source rock quality. Likewise, the Middle-Ordovician Heituao Fm. source rock in the slopes and deep basins has a much wider distribution and better quality than the Upper Ordovician, and its quality is also better than those of the Shaergan and Yinggan Fms. source rock within platforms as well as the lime-mud-mound source rock along the fringe of the Upper-Ordovician platform. Most good Lower-Cambrian source rocks of the Kalpin outcrop lie on the initial ingression surface or in the condensed member of the Type I sequence. In this section, the source rock in Type II is inferior to that in Type I, even being far from an effective one (TOC: <0.5%). Likewise, the good Middle-Ordovician Heituao source rock also lies on the initial ingression surface or in the condensed member of the Type I sequence, while the poor Yinggan source rock and the lime-mud-mound along the fringe of the platform develop all in the Type II sequence. Under the condition of the same sea-level rising altitude and time, the ingression displacement (S1) at the base border in Type I is larger than S2 in Type II. Thus, the distribution of the source rock dev

关键词： Tarim Basin Cambrian-Ordovician system source rock sequence type ingression rate.

Limitation of fault-sealing and its control on hydrocarbon accumulation——An example from the Laoyemiao Oilfi eld of the Nanpu Sag

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petroleum Science 2008年第4期5卷 295-301页

作者： Jiang Zhenxue Dong Yuexia Li Hongyi Liu Luofu Liu Guangdi Li Xiaoying Basin and Reservoir Research Center China University of Petroleum Beijing 102249 China State Key Laboratory of petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China Research institute of exploration and development Jidong Oilfield PetroChina Tangshan Hebei 063004 China School of Resources and Information Technology China University of Petroleum Beijing 102249 China

Based on previous studies on the internal structures of fault belts, the fault belts in the Laoyemiao Oilfield of the Nanpu Sag can be divided into three units, a crushed zone, an upper induced fracture zone and a lower induced fracture zone according to the log response characteristics. The upper induced fracture zone is characterized by the development of pervasive fractures and has a poor sealing or non-sealing capability. It therefore can act as pathways for hydrocarbon migration. The lower induced fracture zone consists of fewer fractures and has limited sealing capability. The crushed zone has a good sealing capability comparable to mudstone and can thus prevent lateral migration of fluid. Through physical modeling and comparing laboratory data with calculated data of oil column heights of traps sealed by faults, it is concluded that the fault-sealing capability for oil and gas is limited. When the oil column height reaches a threshold, oil will spill over from the top of reservoir along the lower induced fracture zone under the action of buoyancy, and the size of reservoir will remain unchanged. Analysis of the formation mechanisms of the fault-sealed reservoirs in the Nanpu Sag indicated that the charging sequence of oil and gas in the reservoir was from lower formation to upper formation, with the fault playing an important role in oil and gas accumulation. The hydrocarbon potential in reverse fault-sealed traps is much better than that in the consequent fault-sealed traps. The reverse fault-sealed traps are favorable and preferred exploration targets.

关键词： Limitation of fault-sealing fault belt oil column height hydrocarbon accumulation Nanpu Sag

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直井防斜打快理论研究进展

石油学报 2004年第3期25卷 86-90页

作者：汪海阁苏义脑中国石油勘探开发研究院钻井所北京100083

钻井过程中影响井斜的因素很多 ,且井斜给钻井、完井等作业带来一系列的危害 ,并造成巨大损失。近年来国内在复杂深井钻井中多次出现井斜问题 ,突出表现在玉门青西、青海柴达木盆地、四川川东、塔里木山前等地区。在现场使用较多的除钟... 详细信息

钻井过程中影响井斜的因素很多 ,且井斜给钻井、完井等作业带来一系列的危害 ,并造成巨大损失。近年来国内在复杂深井钻井中多次出现井斜问题 ,突出表现在玉门青西、青海柴达木盆地、四川川东、塔里木山前等地区。在现场使用较多的除钟摆钻具和满眼钻具防斜技术外 ,主要发展了偏轴钻具防斜技术、螺杆钻具配合PDC钻头防斜技术等 ,但总体来看在直井防斜打快方面进展不大。国外近年来则研制了VDS、SDD、VertiTrak、PowerV等具有主动防斜能力的自动化井斜闭环控制系统 ,成功地解决了高陡构造、断层、盐层等情况下钻进时的井眼质量问题。国内陡倾构造地区井斜问题非常普遍 ,因此应尽快开展新型防斜打快理论研究。

关键词：钻井井斜控制钟摆钻具满眼钻具动力钻具陡倾构造

INVESTIGATION ON THE FLOW STABILITY OF NEWTONIAN FLUID IN ECCENTRIC ANNULUS VIA THE AXIAL RECIPROCATION OF THE INNER TUBE

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Journal of Hydrodynamics 2007年第6期19卷 671-676页

作者： YUAN Ai-wu CUI Hai-qing GAO Tao Management institute Tianjin University Tianjin 300072 China Department of petroleum Engineering Daqing Petroleum Institute Daqing 163318 China Daqing exploration and development institute Daqing 163712 China

The governing equation, together with the formulas of the averaged flux and the stability parameter for Newtonian fluid flowing in eccentric annulus via the axial reciprocation of the inner tube was established in the bipolar coordinate system. Numerical calculation was conducted for the measurement of water flow using the formulas above, of which the results agree well with the experimental data. It is shown that the flow instability can be induced by the increase of the stroke, the frequency, and the eccentricity of annulus, making the sucker rod more susceptible to partial abrasion. Some protecting methods, including adding centralizers, adjusting the stroke and frequency, are proposed to protect the sucker rod from the partial abrasion, and satisfactory results have been achieved in the oilfields.

关键词： eccentric annulus axial reciprocation flow stability partial abrasion

Controlling the uncertainty in reservoir stochastic simulation

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petroleum Science 2010年第4期7卷 472-476页

作者： Cui Yong Chi Bo Chen Guo Ouyang Cheng Xia Bairu china University of Geosciences Beijing 100083 China Research institute of Daqing Oilfield Company Ltd. Heilongjiang 163712 China Geological exploration ＆ development Research institute PetroChina Chuanqing Drilling Engineering CompanyChengdu Sichuan 610051 China

Unexpected noise in reservoir stochastic simulation realization may be too high to make the realization useful, especially when there is a lack of hard data. Through discussing the uncertainties, we present two ways to control the uncertainty ratio that is brought by the algorithm of stochastic simulation. By reasonably reducing the random value of the stochastic simulation result, the unexpected values introduced by the residual that associates with random series can be controlled. Another way when the data disperse unevenly is to control the stochastic simulation order by grouping the points that need to be simulated to make those points which can be simulated by more neighborhood hard data calculated first. Both methods do not go against the core stochastic simulation algorithm.

关键词： Reservoir stochastic simulation hard data Kriging algorithm residual realization

A　COMPARISON　OF　WATER－OIL　RELATIVE　PERMEABILITY　BY　STEADY－STATE　FLOW　AND　UNSTEADY－STATE　FLOW　TECHNIQUES

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石油勘探与开发 1995年第1期 77-82页

作者： Li Ke-vin Dai Zhi-jian Jiang Yi-rong (Research institute of petroleum exploration and Devepment, CNPC. beijing 100083, P. R. china)

ＡＣＯＭＰＡＲＩＳＯＮＯＦＷＡＴＥＲ－ＯＩＬＲＥＬＡＴＩＶＥＰＥＲＭＥＡＢＩＬＩＴＹＢＹＳＴＥＡＤＹ－ＳＴＡＴＥＦＬＯＷＡＮＤＵＮＳＴＥＡＤＹ－ＳＴＡＴＥＦＬＯＷＴＥＣＨＮＩＱＵＥＳＡＣＯＭＰＡＲＩＳＯＮＯＦＷＡＴＥ... 详细信息

ＡＣＯＭＰＡＲＩＳＯＮＯＦＷＡＴＥＲ－ＯＩＬＲＥＬＡＴＩＶＥＰＥＲＭＥＡＢＩＬＩＴＹＢＹＳＴＥＡＤＹ－ＳＴＡＴＥＦＬＯＷＡＮＤＵＮＳＴＥＡＤＹ－ＳＴＡＴＥＦＬＯＷＴＥＣＨＮＩＱＵＥＳＡＣＯＭＰＡＲＩＳＯＮＯＦＷＡＴＥＲ－ＯＩＬＲＥＬＡＴＩＶＥＰＥＲＭ...

关键词： Water drive Relative permeability Unsteady flow Steady flow Core test