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Oil-source rock correlation and quantitative assessment of Ordovician mixed oils in the Tazhong Uplift, tarim Basin

Petroleum Science 2010年第2期7卷 179-191页

作者： Li Sumei Pang Xiongqi Zhang Baoshou Xiao Zhongyao Gu Qiaoyuan State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China tarim Oilfield {2. PetroChina Korla Xinjiang 841000 China

The origin of the marine oils in the tarim Basin has long been a disputed topic. A total of 58 DST （drill stem test） crude oil and 8 rock samples were investigated using a comprehensive geochemical method to characterize and identify the origin of the Ordovician oils in the Tazhong Uplift, tarim Basin, northwest{2.. Detailed oil–oil and oil–source rock correlations show that the majority of the oils have typical biomarker characteristics of the Middle-Upper Ordovician （O2.3） source rock and the related crude oil. These characteristics include a distinct ＂V-shaped＂ relative abundance of C2., C2. and C2. regular steranes, low abundance of dinosterane, 2.-norcholestanes, triaromatic dinosteroids and gammacerane. Only a few oils display typical biomarker characteristics indicating the Cambrian–Lower Ordovician （∈-O1） genetic affinity, such as linear or anti ＂L＂ shape distribution of C2., C2. and C2. regular sterane, with relatively high concentrations of dinosterane, 2.-norcholestanes, triaromatic dinosteroids and gammacerane. It appears that most of the Ordovician oils in the Tazhong Uplift were derived from the O2.3 intervals, as suggested by previous studies. However, the compound specific n-alkane stable carbon isotope data indicate that the Ordovician oils are mixtures from both the ∈-O1 and O2.3 source rocks rather than from the O2.3 strata alone. It was calculated that the proportion of the∈-O1 genetic affinity oils mixed is about 10.8%-74.1%, with an increasing trend with increasing burial depth. This new oil-mixing model is critical for understanding hydrocarbon generation and accumulation mechanisms in the region, and may have important implications for further hydrocarbon exploration in the tarim Basin.

关键词： Biomarker compound specific isotope oil–source rock correlation mixed oil

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Geochemical study on oil-cracked gases and kerogen-cracked gases (Ⅱ)——Discrimination methods between oil-cracked gases and kerogen-cracked gases

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Science china Earth Sciences 2009年第S1期52卷 10-18页

作者： HUANG GuangHui1,2.ZHANG Min1,2.HU GuoYi3 & XIAO ZhongYao4 1 Department of Geochemistry,Yangtze University,Jingzhou 43402.,china 2.Key Laboratory of exploration Technologies for Oil and Gas Resources,Ministry of Education,Jingzhou 43402.,china 3 research institute of Petroleum exploration and development,Petrochina,Beijing 100083,china 4 tarim Oil field Branch company,CNPC,Korle {12.,china

In the processes of discrimination between oil-cracked gases and kerogen-cracked gases,Behar and Pinzgofer et al.'s results were adopted in the former researches,in which the ratio of C2.C3 is basically a constant while the ratio of C1/C2.gradually increases in the course of primary cracking of kerogen. Otherwise in the course of secondary cracking of oil,the ratio of C2.C3 increases rapidly while C1/C2.keeps relatively stable. Our study on analogue experiment shows that,whether it is oil or kerogen,in its process of gas generating by cracking,the ratios of C2.C3,C1/C2.or C1/C3 will all be increased with the growth of thermal conditions. In comparison,the ratio of C2.C3,which is affected by genetic type to some comparatively less extent,mainly responds to the maturity of gases,while the value of C2.C3 is about 2.and that of C2.iC4 is about 10,and the corresponding value of Ro is about 1.5%―1.6%. The influence of gas source on C2.C3 is less than that of gas maturity,otherwise C1/C2.or C1/C3) is obviously affected by cracking matrices. The ratios of C1/C2.C1/C3 of oil-cracked gases are less than that of kerogen-cracked gases,under the condition that the ratios of C2.C3 are similar in value,so are the value of dryness indexes. There exists wide diffidence between this view and the former discrimination method in theory. The analysis of the spot sample indicates that we can apply the above basic view to dealing efficiently with the problem of the discrimination between oil-cracked gas and kerogen-cracked gas.

关键词： tarim Basin oil-cracked gases kerogen-cracked gases discrimination methods gas composition

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超压凝析气藏的流体相态和物理性质

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石油学报 2004年第4期25卷 71-74页

作者：郜国喜袁士义宋文杰李海平罗凯塔里木油田勘探开发研究院新疆库尔勒841000 中国石油勘探开发研究院北京100083 西南石油学院

在国内发现的高温高压凝析气藏越来越多 ,所以须加强对这类气藏流体相态和物性的实验和理论研究。应用某气田地面油气样品 ,在实验室配制了高含蜡凝析气流体 ,研究了高含蜡凝析气在压力很高时的相态和物理参数。通过流体等质膨胀实验 ,... 详细信息

在国内发现的高温高压凝析气藏越来越多 ,所以须加强对这类气藏流体相态和物性的实验和理论研究。应用某气田地面油气样品 ,在实验室配制了高含蜡凝析气流体 ,研究了高含蜡凝析气在压力很高时的相态和物理参数。通过流体等质膨胀实验 ,确定了流体露点压力和相应的实验特性 ,给出了超高压下的压缩因子等数据。采用Dranchk等人的关系式计算了流体在超高压状态下的偏差因子。结果表明 ,计算值明显小于实验数值 ,误差大于 10 % ,且随压力的增大误差也增大。地层流体含有大量的蜡组分 ,在流体压力大于露点压力时。

关键词：高温高压凝析气藏高含蜡凝析气流体相态压缩因子物理性质

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Tectonic types and evolution of Ordovician proto-type basins in the tarim region

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Science Bulletin 2007年第S1期 164-177页

作者： HE DengFa1, ZHOU XinYuan2. ZHANG ChaoJun3 & YANG XiaoFa1 1 Energy Resources School, china University of Geosciences, Beijing 100083 2.Petrochina {2. Oilfield company, Korla 841000, china 3 research institute of Petroleum exploration and development, Petrochina, Beijing 100083, china

The Ordovician system is an important target for exploration in the tarim Basin. Restoration of the Ordovician tectono-depositional environment is a key basis for the study of the structural {2. history in tarim block and the prediction of the favorable Ordovician reservoir belts (zones). Based on the surrounding tectonic settings, the litho-facies and sedimentary fill, the palaeo-geography, palaeoclimate and palaeo-ecology, and the structural deformation and magmatic eruptions, in this paper we combine the sedimentary fill in the basin with the {2. of the surrounding orogenic belts and re-build the proto-type basins of the different Ordovician periods. During the Ordovician period, the tarim region was characterized by the composite of the interior cratonic depression with the peripheral cratonic depression. The interior cratonic depression in the central and western parts is mainly the depositional area of the platform facies while the peripheral cratonic depression in the eastern part is mainly the zone of deepwater basin facies, with the slope acting as the transition belt between them. During the Late Ordovician period, the closure of the Northern kunlun Ocean and destruction of the trencharc-basin system in the Altyn Tagh region put the southern part of the tarim block under compression and uplifting and turned the central and western parts of the carbonate platform into the mixed depositional continental shelf. The eastern region of the basin had the over-compensated flysch sedimentation with huge thickness, marking the drastic turn of the basin nature. The basin tectonic framework turned to the south-north differentiation of the Silurian period from the east-west differentiation of the Ordovician period.

关键词： Ordovician period proto-type basin composite basin basin evolution tarim block

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Poly-phase salt tectonics and hydrocarbon accumulation in tarim superimposed basin,northwest china

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Science china Earth Sciences 2004年第Z2期47卷 104-113页

作者： TANG Liangjie1,2. JIN Zhijun1’3, JIAChengzao1’4, Pl Xuejun5 & CHEN Suping1,2.1. Key Laboratory for Hydrocarbon Accumulation of Education Ministry, Beijing 102.49, china 2. Basin & Reservoir research Center, University of Petroleum, Beijing 102.49, china 3. institute of Petroleum exploration and development, SINOPEC, Beijing 100083, china 4. Petrochina company Limited, Beijing 100011, china 5. tarim Oilfield company, Petrochina company Ltd., Korla 841000, china Key Laboratory for Hydrocarbon Accumulation of Education Ministry Beijing 102249 China Basin & Reservoir research Center University of Petroleum Beijing 102249 China Key Laboratory for Hydrocarbon Accumulation of Education Ministry Beijing 102249 China institute of Petroleum exploration and {2. SINOPEC Beijing 100083 China Key Laboratory for Hydrocarbon Accumulation of Education Ministry Beijing 102249 China Petrochina company Limited Beijing 100011 China tarim Oilfield {2. PetroChina Company Ltd. Korla 841000 China

The purpose of this paper is to discuss the poly-phase salt tectonics and its relation to the hydrocarbon accumulation of the tarim superimposed basin. Several salt sequences are developed in the tarim basin, they are: (1) the Mid-Early Cambrian salt sequence, mainly distributed in the west part of the north tarim uplift and Keping uplift; (2. the Early Carboniferous salt sequence, mainly distributed in the south slope of the north tarim uplift; (3) the Paleogene salt sequence, mainly distributed in the mid-west part of the kuqa foreland fold belt and north tarim uplift; and (4) the Miocene salt sequence, mainly distributed in the east part of the kuqa foreland fold belt. The salt sequences deposited in the tectonically calm scenario, while the salt layers deformed during the period of intense tectonism. Although the salt sequences are characteristic of plastic flow, the differences of salt deformation styles exist in the different salt sequences be-cause of the different deformation mechanism. It is attractive that the distribution of the large oil-gas fields or pools has a bearing upon the salt sequences and salt structures, such as the Tahe oilfield related to the Lower Carboniferous salt sequence and laterally facies changed mudstone, the Kela No.2.gas field to the Paleogene salt structures, and the Dina gas field to the Miocene salt structures. It is indicated that the large-scale hydrocarbon accumulation is con-trolled by the poly-phase salt sequences and structures. The deep analysis of the poly-phase salt tectonics is helpful to understanding the characteristics of the structural deformation and oil-gas accumulation of the tarim basin.

关键词： superimposed basin, salt tectonics, hydrocarbon accumulation, tarim basin.

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中国东北地区CO_2.藏成因及聚集规律分析

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石油学报 2003年第6期24卷 13-17,23页

作者：张晓东大庆油田有限责任公司勘探开发研究院黑龙江大庆163712

对东北地区区域构造进行了研究,分析了对该区有控制作用的各个深而大的断裂的特征,进而研究了各构造地质单元的演化规律、岩浆作用及其对盆地形成、演化的控制作用.在此基础上,阐述了CO2.的形成环境.CO2.碳同位素资料、3He 4He比值及... 详细信息

对东北地区区域构造进行了研究,分析了对该区有控制作用的各个深而大的断裂的特征,进而研究了各构造地质单元的演化规律、岩浆作用及其对盆地形成、演化的控制作用.在此基础上,阐述了CO2.的形成环境.CO2.碳同位素资料、3He 4He比值及甲烷、乙烷、丙烷同位素的倒序证明了该区的气藏属于无机幔源气.基于CO2.深大断裂和岩浆岩、火山岩的关系,论述了盆地中CO2.成因机制和分布范围以及CO2.藏的类型、聚集规律、流体性质等.

关键词：区域构造断裂带二氧化碳气藏成因聚集规律碳同位素中国东北地区油气勘探

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A discussion on the upper limit of maturity for gas generation by marine kerogens and the utmost of gas generative potential:Taking the study on the tarim Basin as an example

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Science Bulletin 2007年第S1期 125-132页

作者： CHEN JianPing1,2. ZHAO WenZhi1, XIAO ZhongYao3, ZHANG ShuiChang1,2. DENG ChunPing1,2. SUN YongGe4 & WANG ZhaoMing3 1 research institute of Petroleum {2. & development, Petrochina, Beijing 100083, china 2.Key Lab of Petroleum Geochemistry, CNPC, Beijing 100083, china 3 research institute of Petroleum {2. & development, tarim Oil{12. company, Petrochina, Korla 841000, china 4 State Key Lab of Organic Geochemistry, Guangzhou institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, china

The experimental data yielded by Rock-Eval pyrolysis, kerogen atomic H/C, Py-GC and gold-tube sealing thermal simulation on the marine Cambrian-Ordovician source rock from the tarim Basin revealed that the upper limit of maturity for natural gas generation or the "deadline of gas generation" for marine types I and II kerogens is equal to 3.0% of vitrinite reflectance (Ro); while the "deadline of gas generation" for type III kerogens typically like coals is as high as 10% Ro. Thus, different organic matter has obviously different utmost maturities for gas generation. The mass-balance calculation by kerogen elements showed that when Ro>1.5%, the utmost amount of gas generation for the marine type II kerogen is less than 185 m3/t TOC, accounting for less than 30% of its total hydrocarbon generative potential; when Ro>2.0%, it becomes 110 m3/t TOC, less than 2.% of the total hydrocarbon generative potential. The amount of the gas generative potential obtained by Rock-Eval is only around one tenth of the calculated value by the mass balance of kerogen elements at the same thermal evolutionary stage, while those by Py-GC and gold-tube sealing simulation are intervenient between the above two. The utmost of gas generative potential at the over 1.3% Ro stage is around 60―90 m3/t TOC, therefore, the amount of gas generation obtained by Rock-Eval is the minimum of gas generative potential, while that by the mass-balance calculation of kerogen elements is the maximum that the actual amount of gas generation should not exceed.

关键词： marine source rock kerogen maturity natural gas deadline of gas generation utmost of gas generative potential

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可动凝胶调驱技术在断块油田中的应用

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石油学报 2004年第4期25卷 50-53,57页

作者：袁士义韩冬苗坤张满库韦莉中国石油勘探开发研究院北京100083 华北二连油田分公司内蒙锡林浩特026000

利用室内岩心实验和数值模拟方法 ,研究了可动凝胶体系的成胶行为、渗流机理和影响因素 ,给出了矿场试验设计方案。在此基础上 ,采用聚合物浓度为 80 0mg/L ,交联剂浓度为 18mg/L的可动凝胶配方和撬装注入设备 ,在华北二连油田吉 45断... 详细信息

利用室内岩心实验和数值模拟方法 ,研究了可动凝胶体系的成胶行为、渗流机理和影响因素 ,给出了矿场试验设计方案。在此基础上 ,采用聚合物浓度为 80 0mg/L ,交联剂浓度为 18mg/L的可动凝胶配方和撬装注入设备 ,在华北二连油田吉 45断块开展了整体区块调驱先导试验。试验区包括注入井 5口 ,生产井 19口。试验共注入凝胶溶液 985 40m3 。实施可动凝胶调驱技术后 ,油田的整体开发效果得到了明显改善 ,区块内 19口生产井平均综合含水率下降 6 5 % ,产油量增加 15t/d ,提高采收率 6 2.2.% 。

关键词：可动凝胶调驱技术复杂断块油田整体区块调剖现场试验

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塔里木油田水碳酸盐平衡系数与有机酸的意义

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石油学报 2003年第5期24卷 32-35页

作者：李伟刘宝珺闵磊成都理工大学中国石油勘探开发研究院地质所北京100083 中国石油塔里木油田分公司

根据统计学规律 ,对塔里木盆地油田水进行了研究 ,阐明了该盆地油田水的碳酸盐平衡系数 (简称为RC)与有机酸的基本特征。从油田水的无机组分与有机组分的统计分析中发现了油田水的碳酸盐平衡系数与有机酸存在明显的负相关性 ,进一步论... 详细信息

根据统计学规律 ,对塔里木盆地油田水进行了研究 ,阐明了该盆地油田水的碳酸盐平衡系数 (简称为RC)与有机酸的基本特征。从油田水的无机组分与有机组分的统计分析中发现了油田水的碳酸盐平衡系数与有机酸存在明显的负相关性 ,进一步论证了碳酸盐平衡系数和有机酸与油气聚集及油气性质的关系。碳酸盐平衡系数越低及低碳有机酸的含量越高 ,它们与油藏 ,尤其是与轻质油或气藏的关系越密切。从两者的关系中初步了解到有机酸的溶蚀作用对油气藏中储层次生孔隙的形成应有较重要的影响。

关键词：塔里木盆地油田水碳酸盐平衡系数有机酸油气聚集

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Geochemical Characteristics and Origin of Natural Gases in the Qaidam Basin,china

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Acta Geologica Sinica(English Edition) 2003年第1期77卷 103-115页

作者： ZHANG Xiaobao, HU Yong, DUAN Yi, MA Liyuan, MENG Zifang, HE Peng,ZHOU Shixin and PENG DehuaState Key Laboratory of Gas Geochemistry, Lanzhou institute of Geology, Chinese Academy ofSciences, Lanzhou, Gansu 730000 research institute of Petroleum exploration and development, Qinghai Petroleum company,CNPC, Dunhuang, Gansu 7362.0 Chinese Acad Sci Lanzhou Inst Geol State Key Lab Gas Geochem Lanzhou 730000 Gansu Peoples R China Qinghai Petr Co Res Inst Petr Explorat & Dev CNPC Dunhuang 736200 Gansu Peoples R China

Sixty-five natural gas samples were collected from 19 oil-gasfields in theQaidam basin, china. The chemical composition and carbon isotope values of the samples weremeasured, and the geochemical characteristics and origin of the natural gases were studied. Thegases can be divided into biogenic gases, sapropelic oil-type gases, mixed type oil-type gases,coal-type gases and mixed gas. The delta^(13)C_1 values of the biogenic gases are very small and theC_2.+ contents of them are very low, ranging from -68.2.per thousand to -61 .8 per thousand and0.06 percent to 0.2. percent respectively. They have heavy delta D and delta^(13)C_(CO_2., showing aCO_2.reduction pathway. They ,are distributed in the East depression region and derived from theQuaternary source rocks. The sapropelic oil-type gases have small delta^(13)C_2.values and highC_2.+ ranging from -36.6 per thousand to -2..6 per thousand and from 33.01 percent to 47.15 percentrespectively. The mixed type oil-type gases have delta^(13)C_2.values and C_2.+ contents varyingfrom -2..6 per thousand to -2..8 per thousand and from 4.81 percent to 2..06 percent *** sapropelic oil-type gases and mixed type oil-type gases are associated with oil-type oils,distributed in the West depression region and derived from the Tertiary saltwater lacustrinesapropelic source rocks and humic source rocks respectively. The delta^(13)C_2.values of thecoal-type gases are extremely high and the C_2.+ contents are very low, changing from -2..3 perthousand to -12.5 per thousand and from 0.06 percent to 18.07 percent respectively. The coal-typegases in the Nanbaxian gasfield and the Lenghu oil-gasfields in the North fault block belt arederived from the Middle Jurassic coal-measures source rocks, whereas those in the West depressionregion are derived from the Tertiary saltwater lacustrine humic source rocks. Compared with someother basins in china, the natural gases there have obviously heavier delta^(13)C due to the heavierdelta^(1

关键词： natural gas geochemical characteristics origin Qaidam basin

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