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Origin of the Silurian Crude Oils and Reservoir Formation Characteristics in the Tazhong Uplift

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Acta Geologica Sinica(English Edition) 2010年第5期84卷 1128-1140页

作者： YANG Haijun LI Sumei PANG Xiongqi xiao zhongyao gu qiaoyuan {3. Baoshou research institute of exploration and {3. Petrochina Tarim Oilfield Company Korla Xinjiang 841000 China The National Key Laboratory of petroleum Resources and Prospecting China University of Petroleum Changping Beijing 102249 China

The Silurian stratum in the Tazhong uplift is an important horizon for exploration because it preserves some features of the hydrocarbons produced from multi-stage tectonic evolution. For this reason, the study of the origin of the Silurian oils and their formation characteristics constitutes a major part in revealing the mechanisms for the composite hydrocarbon accumulation zone in the Tazhong area. Geochemical investigations indicate that the physical properties of the Silurian oils in Tazhong vary with belts and blocks, i.e., heavy oils are distributed in the TZ47-15 well-block in the North Slope while normal and light oils in the No. I fault belt and the TZ16 well-block, which means that the oil properties are controlled by structural patterns. Most biomarkers in the Silurian oils are similar to that of the Mid-Upper Ordovician source rocks, suggesting a good genetic relationship. However, the compound specific isotope of n-alkanes in the oils and the chemical components of the hydrocarbons in fluid inclusions indicate that these oils are mixed oils derived from both the Mid- Upper Ordovician and the Cambrian-Lower Ordovician source rocks. Most Silurian oils have a record of secondary alterations like earlier biodegradation, including the occurrence of ＂UCM＂ humps in the total ion current （TIC） chromatogram of saturated and aromatic hydrocarbons and 25-norhopane in saturated hydrocarbons of the crude oils, and regular changes in the abundances of light and heavy components from the structural low to the structural high. The fact that the Silurian oils are enriched in chain alkanes, e.g., n-alkanes and 25-norhopane, suggests that they were mixed oils of the earlier degraded oils with the later normal oils. It is suggested that the Silurian oils experienced at least three episodes of {13.leum charging according to the composition and distribution as well as the maturity of reservoir crude oils and the oils in fluid inclusions. The migration and accumulation model

关键词： Silurian isotope biomarker mixed-source oil

深度开发油田确定性与随机建模结合的相控建模

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石油学报 2004年第5期25卷 60-64页

作者：吕晓光张永庆陈兵陈舒薇潘懋大庆油田有限责任公司勘探开发研究院黑龙江大庆163712 北京大学地质系北京100871

总结了储层建模研究的几个基本观点 ,提出了采用确定性微相建模与随机参数模拟相结合以提高整体建模精度的思路。在微相确定性建模的基础上 ,采用相控蒙特卡洛模拟预测储层参数分布 ,生成了参数分布。对低弯度分流河道砂体建模实例的研... 详细信息

总结了储层建模研究的几个基本观点 ,提出了采用确定性微相建模与随机参数模拟相结合以提高整体建模精度的思路。在微相确定性建模的基础上 ,采用相控蒙特卡洛模拟预测储层参数分布 ,生成了参数分布。对低弯度分流河道砂体建模实例的研究结果表明 ,相控条件下的参数随机模拟精细刻画了储层的非均质性。对于资料信息点足够大的处于成熟开发的油田 ,采用研究区实际统计分布函数得到的随机模拟结果更接近于地下实际的非均质构型。

关键词：油田开发储层建模地喷约束相控模型随机参数蒙特卡洛模拟非均质性储层

湖相热液白云岩成因机理——以准噶尔盆地玛湖凹陷二叠系风城组为例

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沉积学报 2024年第1期42卷 130-141页

作者：王剑周路刘金马聪卞保力李啸张宝真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 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 西南石油大学地球科学与技术学院成都610500 中国石油新疆油田分公司勘探开发研究院新疆克拉玛依834000 中国石油新疆油田分公司风城作业区新疆克拉玛依834000

[目的]湖相白云岩是一种重要的油气储层岩石类型,但成因机制研究较晚且相对薄弱。[方法]为研究湖相热液白云岩成因机理,以准噶尔盆地玛湖凹陷二叠系风城组白云岩为例,采用岩心观察描述,岩石薄片鉴定、扫描电镜、稀土元素、稳定同位素、... 详细信息

[目的]湖相白云岩是一种重要的油气储层岩石类型,但成因机制研究较晚且相对薄弱。[方法]为研究湖相热液白云岩成因机理,以准噶尔盆地玛湖凹陷二叠系风城组白云岩为例,采用岩心观察描述,岩石薄片鉴定、扫描电镜、稀土元素、稳定同位素、流体包裹体等实验分析,系统研究了风城组白云岩的岩矿特征、地球化学特征。[结果]风城组白云岩主要发育在风城组二段和三段,以分散型、纹层型、条带—团块集合体型产出。白云岩形成于高盐度、强还原和受热液控制的典型碱湖环境。深部热液侵入为湖盆提供了丰富的Mg^(2+)、Fe^(2+)、HCO_(3.^(-)、CO_(3.^(2-)离子,为白云岩的形成提供了物质基础。湖相热液白云岩存在两种成因:一是热液—蒸发沉积成因,在热液侵入及干旱强蒸发作用下,高Mg/Ca、高pH值、高盐度湖盆水体提供了云化作用的介质,形成纹层状白云岩。二是埋藏—热液交代成因,深部热流沿断裂上升侵入地层,促进埋藏白云岩化,形成条带—团块状白云岩。[结论]研究结果对我国其他盆地湖相热液白云岩的研究具有重要借鉴意义。

关键词：白云岩热液成因机理风城组玛湖凹陷准噶尔盆地

柴达木盆地北缘东段中侏罗统物源分析——来自重矿物、元素地球化学及碎屑锆石年代学的证据

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沉积学报 2024年第2期42卷 466-485页

作者：呼其图关平王大华李世恩肖永军张驰白璐张济华北京大学造山带与地壳演化教育部重点实验室北京100871 北京大学石油与天然气研究中心北京100871 中国石油化工股份有限公司胜利油田分公司勘探开发研究院山东东营257000

【目的】柴达木盆地北缘东段地区广泛出露侏罗纪残留地层。由于后期强烈改造,该地区侏罗纪原型盆地被严重破坏,其残留凹陷原始沉积关系、原型盆地发育及展布规律一直是学术界的研究热点。【方法】通过对该地区中侏罗统碎屑岩样品的重矿... 详细信息

【目的】柴达木盆地北缘东段地区广泛出露侏罗纪残留地层。由于后期强烈改造,该地区侏罗纪原型盆地被严重破坏,其残留凹陷原始沉积关系、原型盆地发育及展布规律一直是学术界的研究热点。【方法】通过对该地区中侏罗统碎屑岩样品的重矿物Q型聚类分析、全岩地球化学以及碎屑锆石U-Pb年代学分析,进行了系统物源分析,并结合古构造背景、地层与沉积相特征,对该地区侏罗纪原型盆地进行了初步探讨。【结果与结论】(1)中侏罗世,可将研究区划分为5个沉积体系,各沉积区重矿物组合、全岩地球化学以及碎屑锆石年龄特征相异;(2)研究区物源母岩主要为中—酸性岩浆岩,混有不同程度的再旋回沉积岩;(3.物源区岩石的成因以大陆岛弧和活动大陆边缘为主,且普遍受到两期岩浆事件(200~3.0 Ma和400~500 Ma)的影响;(4)研究区与潜在物源区特征对比显示,A区物源主要来自柴北缘构造带,少量物源来自欧龙布鲁克古地块;B区物源主要来自北偏东方向的南祁连地体;C区和D区物源主要来自近物源供给,推测为北方向的古隆起;E区物源主要来自东部东昆仑鄂拉山附近;(5)研究区在大煤沟组第五段时期,发育多个小型分隔型湖盆,而到了大煤沟第七段时期,小柴旦—红山地区和霍布逊地区湖盆连通,成为统一湖盆。研究结果对于了解柴达木盆地侏罗纪演化,指示青藏高原北缘盆山体系的相互作用以及指导柴北缘东段油气勘探具有科学意义。

关键词：柴北缘东段中侏罗统物源分析重矿物组合元素地球化学碎屑锆石U-Pb年代学

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油田开发后期的相控建模

新疆石油地质 2005年第1期26卷 77-79页

作者：吕晓光张永庆陈兵中国石油国际公司中国石油大庆油田有限责任公司勘探开发研究院黑龙江大庆163.12 中国石油大庆油田有限责任公司勘探开发研究院

采用相控建模的思路是提高储集层建模精度的关键。根据成熟开发油田的技术、信息特点,提出了沉积学微相建模与参数定量预测的思路、方法和主要步骤。对低弯度分流河道砂体开展了建模实例研究。预测结果表明,与常规的非相控参数预测相比... 详细信息

采用相控建模的思路是提高储集层建模精度的关键。根据成熟开发油田的技术、信息特点,提出了沉积学微相建模与参数定量预测的思路、方法和主要步骤。对低弯度分流河道砂体开展了建模实例研究。预测结果表明,与常规的非相控参数预测相比,前者的预测结果,促进了地质概念向模型转化,建模结果更符合地下地质实际。这一思路有利于发挥地质家的经验、知识和技能,其结果将更好地发挥地质的约束作用,同时也更适合我国油藏描述的基础和实际。文中同时指出,进一步的实践中可考虑沉积学微相建模与随机参数预测结合的思路。

关键词：相控油田开发后期微相油藏描述地质砂体储集层沉积学分流河道实例研究

research progress on isotopic fractionation in the process of shale gas/coalbed methane migration

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petroleum exploration and development 2022年第5期49卷 1069-1084页

作者： LI Wenbiao lu Shuangfang LI Junqian WEI Yongbo ZHAO Shengxian zhang Pengfei WANG Ziyi LI xiao WANG Jun Sanya Offshore Oil&Gas research institute Northeast Petroleum UniversitySanya 572025China Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient development Ministry of EducationNortheast Petroleum UniversityDaqing 163318China School of Geosciences China University of Petroleum(East China)Qingdao 266580China exploration and development research {3. of Daqing oilfield Co.Ltd. Daqing 163712China Shale Gas research institute of petroChina Southwest Oil&Gasfield {3. Chengdu 610051China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

The research progress of isotopic fractionation in the process of shale gas/coalbed methane migration has been reviewed from three aspects: characteristics and influencing factors, mechanism and quantitative characterization model, and geological application. It is found that the isotopic fractionation during the complete production of shale gas/coalbed methane shows a four-stage characteristic of “stable-lighter-heavier-lighter again”, which is related to the complex gas migration modes in the pores of shale/coal. The gas migration mechanisms in shale/coal include seepage, diffusion, and adsorption/desorption. Among them, seepage driven by pressure difference does not induce isotopic fractionation, while diffusion and adsorption/desorption lead to significant isotope fractionation. The existing characterization models of isotopic fractionation include diffusion fractionation model, diffusion-adsorption/desorption coupled model, and multi-scale and multi-mechanism coupled model. Results of model calculations show that the isotopic fractionation during natural gas migration is mainly controlled by pore structure, adsorption capacity, and initial/boundary conditions of the reservoir rock. So far, the isotope fractionation model has been successfully used to evaluate critical parameters, such as gas-in-place content and ratio of adsorbed/free gas in shale/coal etc. Furthermore, it has shown promising application potential in production status identification and decline trend prediction of gas well. Future research should focus on:(1) the co-evolution of carbon and hydrogen isotopes of different components during natural gas migration,(2) the characterization of isotopic fractionation during the whole process of gas generation-expulsion-migration-accumulation-dispersion, and(3. quantitative characterization of isotopic fractionation during natural gas migration in complex pore-fracture systems and its application.

关键词： shale gas coalbed methane diffusive fractionation adsorption/desorption fractionation isotope fractionation model natural gas migration

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陆梁油田呼图壁河组油藏数值模拟研究

新疆石油地质 2004年第2期25卷 180-181页

作者：张吉张烈辉张红梅江晓辉张居增西南石油学院四川成都610500 中国石油新疆油田分公司勘探开发研究院新疆克拉玛依834000

准噶尔盆地陆梁油田陆9井区呼图壁河组(K1h62-K1h72)油藏为构造幅度低、油水关系复杂、非均质强的边水油藏。应用数值模拟方法,紧密结合油藏精细描述和油藏工程研究结果,研究了该油藏合理的技术开发政策界限,最终确定了该油藏应立足于... 详细信息

准噶尔盆地陆梁油田陆9井区呼图壁河组(K1h62-K1h72)油藏为构造幅度低、油水关系复杂、非均质强的边水油藏。应用数值模拟方法,紧密结合油藏精细描述和油藏工程研究结果,研究了该油藏合理的技术开发政策界限,最终确定了该油藏应立足于注水开发,合理采油速度为2.9%,合理注采比是0.8,合理压力水平应保持在9.0MPa左右;油藏仍应采用反九点井网方式进行配注等开采技术政策界限。数值模拟研究结果对油田实际开发有很好的指导作用。

关键词：油藏数值模拟准噶尔盆地地质构造

Control of paleogeographic pattern on sedimentary differentiation of evaporite-carbonate symbiotic system:A case study of the sixth sub-member of Ordovician Majiagou Formation M5 Member in central-eastern Ordos Basin,NW China

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petroleum exploration and development 2022年第4期49卷 837-850页

作者： ZHONG Shoukang TAN Xiucheng HU guang NIE Wancai YANG Mengying zhang Daofeng ZHENG Jianfeng XU Jie DONG guodong {3. Di lu Zixing State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu 610500China Southwest petroleum University Division of Key Laboratory of Carbonate Reservoirs CNPCChengdu 610500China Natural Gas Project Department Changqing Oilfield Company of PetroChinaXi'an 710016China research institute of exploration and {3. Changqing Oilfield Company of PetroChinaXi'an 710016China petroChina Hangzhou research Insitute of Geology Hangzhou 310023China

The relationship between paleogeographic pattern and sedimentary differentiation of evaporite-carbonate symbiotic system is examined based on logging,core and thin section data,by taking the sixth sub-member of fifth member of Ordovician Majiagou Formation(M56)in the central-eastern Ordos Basin as an example.(1)Seven sub-geomorphic units(Taolimiao west low,Taolimiao underwater high,Taolimiao east low,Hengshan high,East salt low,North slope and Southwest slope)developed in the study area.(2)The“three lows”from west to east developed dolomitic restricted lagoon,evaporite evaporative lagoon and salt evaporative lagoon sedimentary facies respectively,the"two highs"developed high-energy grain beach and microbial mound,and the north and south slopes developed dolomitic flats around land.(3.The paleogeographic pattern caused natural differentiation of replenishment seawater from the northwest Qilian sea,leading to the eccentric sedimentary differentiation of dolomite,evaporite and salt rock symbiotic system from west to east,which is different from the classic“bull's eye”and“tear drop”distribution patterns.(4)As the Middle Qilian block subducted and collided into the North China Plate,the far-end compression stress transferred,giving rise to the alternate highland and lowland in near north to south direction during the sedimentary period of M56 sub-member.(5)Taolimiao underwater high and Hengshan high developed favorable zones of microbial mounds and grain shoals in south to north strike in M56 sub-member,making them favorable exploration areas with great exploration potential in the future.

关键词： paleogeographic pattern sedimentary differentiation evaporite and carbonate rock favorable reservoir facies zone Ordovician Majiagou Formation Ordos Basin

Tight gas charging and accumulation mechanisms and mathematical model

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petroleum exploration and development 2023年第6期50卷 1411-1425页

作者： ZHOU Nengwu lu Shuangfang zhang Pengfei LIN Zizhi xiao Dianshi lu Jiamin ZHU Yingkang LIU Yancheng LIN Liming WANG Min JIANG Xinyu LIU Yang WANG Ziyi LI Wenbiao Sanya Offshore Oil&Gas research institute Northeast Petroleum UniversitySanya 572025China Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient development Ministry of EducationNortheast Petroleum UniversityDaqing 163318China School of Geosciences China University of Petroleum(East China)Qingdao 266580China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China exploration and development research {3. PetroChina Daqing Oilfield Company LimitedDaqing 163712China China United Coalbed Methane Co. Ltd.Beijing 100083China

The gas-water distribution and production heterogeneity of tight gas reservoirs have been summarized from experimental and geological observations, but the charging and accumulation mechanisms have not been examined quantitatively by mathematical model. The tight gas charging and accumulation mechanisms were revealed from a combination of physical simulation of nuclear magnetic resonance coupling displacement, numerical simulation considering material and mechanical equilibria, as well as actual geological observation. The results show that gas migrates into tight rocks to preferentially form a gas saturation stabilization zone near the source-reservoir interface. When the gas source is insufficient, gas saturation reduction zone and uncharged zone are formed in sequence from the source-reservoir interface. The better the source rock conditions with more gas expulsion volume and higher overpressure, the thicker the gas saturation stabilization and reduction zones, and the higher the overall gas saturation. When the source rock conditions are limited, the better the tight reservoir conditions with higher porosity and permeability as well as larger pore throat, the thinner the gas saturation stabilization and reduction zones, but the gas saturation is high. The sweet spot of tight gas is developed in the high-quality reservoir near the source rock, which often corresponds to the gas saturation stabilization zone. The numerical simulation results by mathematical model agree well with the physical simulation results by nuclear magnetic resonance coupling displacement, and reasonably explain the gas-water distribution and production pattern of deep reservoirs in the Xujiaweizi fault depression of the Songliao Basin and tight gas reservoirs in the Linxing-Huangfu area of the Ordos Basin.

关键词： tight gas charging and accumulation mechanism mathematical model Xujiaweizi fault depression Songliao Basin Linxing-Huangfu area Ordos Basin