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Main progress and problems in research on Ordovician hydrocarbon accumulation in the tarim basin

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Petroleum Science 2010年第2期7卷 147-163页

作者： Pang Xiongqi Tian Jun Pang Hong Xiang Caifu Jiang Zhenxue Li Sumei basin and Reservoir Research Center School of Natural Resources and Information Technology China University ofPetroleum Beijing 102249 China State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China PetroChina tarim Oilfield Company Korla Xinjiang 841000 China

The tarim basin is the largest petroliferous basin in the northwest of China, and is composed of a Paleozoic marine craton basin and a Meso-Cenozoic continental foreland basin. It is of great significance in exploration of Ordovician. In over 50 years of exploration, oil and gas totaling over 1.6 billion tonnes oil-equivalent has been discovered in the Ordovician carbonate formation. The accumulation mechanisms and distribution rules are quite complicated because of the burial depth more than 3.500 m, multi-source, and multi-stage accumulation, adjustment, reconstruction and re-enrichment in Ordovician. In this paper, we summarized four major advances in the hydrocarbon accumulation mechanisms of Ordovician carbonate reservoirs. First, oil came from Cambrian and Ordovician source rocks separately and as a mixture, while natural gas was mainly cracked gas generated from the Cambrian-Lower Ordovician crude oil. Second, most hydrocarbon migrated along unconformities and faults, with different directions in different regions. Third, hydrocarbon migration and accumulation had four periods： Caledonian, early Hercynian, late Hercynian and Himalayan, and the latter two were the most important for oil and gas exploration. Fourth, hydrocarbon accumulation and evolution can be generally divided into four stages： Caledonian （the period of hydrocarbon accumulation）, early Hercynian （the period of destruction）, late Hercynian （the period of hydrocarbon reconstruction and re-accumulation）, and Himalayan （the period of hydrocarbon adjustment and re-accumulation）. Source rocks （S）, combinations of reservoir-seal （C）, paleo-uplifts （M）, structure balance belt （B） matched in the same time （T） control the hydrocarbon accumulation and distribution in the Ordovician formations. Reservoir adjustment and reconstruction can be classified into two modes of physical adjustment and variation of chemical compositions and five mechanisms. These mechanisms are occurrence displacement, biodegradat

关键词： tarim basin carbonate reservoirs oil and gas exploration of the Ordovician hydrocarbon accumulation mechanism hydrocarbon enrichment rule

Dissimilatory Fe(Ⅲ) reduction characteristics of paddy soil extract cultures treated with glucose or fatty acids

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Journal of Environmental Sciences 2008年第9期20卷 1103-1108页

作者： HE Jiangzhou1,2, QU Dong1, 1. College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China.2. xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in tarim basin, tarim University, Alar, xinjiang Uygur Autonomous Region, xinjiang 843.00, China

Dissimilatory Fe(Ⅲ) reduction is a universal process with irreplaceable biological and environmental importance in anoxic environments. Our knowledge about Fe(Ⅲ) reduction predominantly comes from pure cultures of dissimilatory Fe(Ⅲ) reducing bacteria (DFRB). The objective of this study was to compare the effects of glucose and a selection of short organic acids (citrate, succinate, pyruvate, propionate, acetate, and formate) on Fe(Ⅲ) reduction via the anaerobic culture of three paddy soil solutions with Fe...

关键词： dissimilatory Fe(Ⅲ) reduction glucose organic acid anaerobic incubation

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

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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 Company 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 China. 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 C27, C28 and C29 regular steranes, low abundance of dinosterane, 24-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 C27, C28 and C29 regular sterane, with relatively high concentrations of dinosterane, 24-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

塔西南坳陷下奥陶统风化壳中地开石的发现及其意义

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新疆石油地质 1997年第4期18卷 307-312页

作者：赵杏媛塔里木石油勘探开发指挥部勘探研究中心新疆库尔勒841000

地开石发育状况直接反映了地开石形成时储集层溶蚀孔隙发育、连通程度和上覆地层的温度条件,因而研究地开石对油气勘探有着重要的意义.我国仅在陕甘宁盆地、塔里木盆地下奥陶统风化壳白云岩溶蚀孔中发现地开石,塔里木盆地地开石的发现表... 详细信息

地开石发育状况直接反映了地开石形成时储集层溶蚀孔隙发育、连通程度和上覆地层的温度条件,因而研究地开石对油气勘探有着重要的意义.我国仅在陕甘宁盆地、塔里木盆地下奥陶统风化壳白云岩溶蚀孔中发现地开石,塔里木盆地地开石的发现表明,塔里木盆地西部,尤其是巴楚—麦盖提地区的下奥陶统风化壳是寻找天然气聚集的最有利地区.

关键词：盆地早奥陶世风化壳天然气储集层地开石

Control of neotectonic movement on hydrocarbon accumulation in the Kuqa Foreland basin,west China

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Petroleum Science 2010年第1期7卷 49-58页

作者： Jiang Zhenxue Li Lianxia Song Yan Tian Fenghua Zhao Mengjun Wang Haijiang Zhao Zhenxing State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China basin and Reservoir Research Center China University of Petroleum Beijing 102249 China Exploration and Development Research Institute PetroChina Beijing 100083 China Department of Exploration ＆ Development PetroChina CBM Limited Company Beijing 100013 China Exploration Department Tarim Oilfield Company PetroChina Kuerle Xinjiang 841000 China No.8 Oil Production Plant Changqing Oilfield Company PetroChina Xi＇an Shaanxi 710018 China

Neotectonic movement refers to the tectonic movement that has happened since the Cenozoic, which is the latest movement. It has the most important influence on the basins in west China, especially on the hydrocarbon accumulation in the western foreland basins. We determined the time of neotectonic movement in the Kuqa Foreland basin, which began from the Neogene, and analyzed the patterns of movement, which were continuous and fast subsidence in the vertical direction and intense lateral compression. The structure styles are that the faulting is weakened and the folding is strengthened gradually from north to south. We studied the control of neotectonic movement on the hydrocarbon accumulation process and model in the Kuqa Foreland basin with basin simulation technique. The largest subsidence rate of the Kuqa Foreland basin reached 1,200 m/Ma during the neotectonic movement, leading to rapid maturing of source rock within 5 Ma and a large quantity of hydrocarbon being generated and expelled. The thick neotectonic strata can form high quality reservoirs with the proved gas and oil reserves accounting for 5% and 27% of the total reserves, respectively. 86% of the structural traps were formed in the neotectonic movement period. The faults formed during the neotectonic movement serve as important migration pathways and they exist in the region where the hydrocarbon reservoirs are distributed. Abnormally high pressure caused by the intense lateral compression, thick neotectonic strata deposition and rapid hydrocarbon generation provide driving force for hydrocarbon migration. The accumulation elements match each other well over a short period, leading to many large gas fields formed later in the Kuqa Foreland basin.

关键词： Kuqa Foreland basin neotectonic movement accumulation element accumulation process accumulation model

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概化三角形河床水沙交界面的水流特性研究

广东水利水电 2020年第7期 63-66页

作者：王亚军塔里木河流域干流管理局

为了明确波状河床水沙交界面的水流特性,将河床概化为三角形河床,利用COMSOL Multiphysicis软件进行数值模拟研究,首先根据沉积物深度与潜流正交换区深度的关系曲线确定了河床的沉积物深度。设置了5种三角形河床,对两种工况下的水流特... 详细信息

为了明确波状河床水沙交界面的水流特性,将河床概化为三角形河床,利用COMSOL Multiphysicis软件进行数值模拟研究,首先根据沉积物深度与潜流正交换区深度的关系曲线确定了河床的沉积物深度。设置了5种三角形河床,对两种工况下的水流特性进行研究,研究的参数有水沙交界面的流速和潜流交换量。结果表明:三角形河床的形状对上升流和下降流区域、水沙交界面质点流速具有显著的影响,上升流潜流交换量和下降流潜流交换量近似相等,潜流交换量会随着三角形河床形状发生变化。

关键词：概化三角形河床水沙交界面流速潜流交换量 COMSOL Multiphysicis

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自组织神经网络地震岩相分析

新疆石油地质 2004年第5期25卷 532-534页

作者：杨世明孙龙德杨新华中国石油塔里木油田分公司博士后站新疆库尔勒841000 中国石油塔里木油田分公司新疆库尔勒841000

自组织神经网络据研究对象属性特征的相似性,将对象按要求类别数对分类进行正确归类,避免了BP神经网络必须提供学习样本的缺点。通过地震数据自动识别地震岩相,在塔里木盆地LGX油田应用取得了明显效果。在岩相图上解释了6条近东西向展... 详细信息

自组织神经网络据研究对象属性特征的相似性,将对象按要求类别数对分类进行正确归类,避免了BP神经网络必须提供学习样本的缺点。通过地震数据自动识别地震岩相,在塔里木盆地LGX油田应用取得了明显效果。在岩相图上解释了6条近东西向展布的断裂,这些断裂控制了LGX油田的油气分布,与实钻结果相符,说明自组织神经网络碳酸盐岩储集层的有效性。

关键词：自组织神经网地震岩相塔里木盆地碳酸盐岩储集层地震数据处理

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优化三维层位控制法速度建场及其应用

新疆石油地质 2003年第5期24卷 458-460页

作者：吴超宁斌王晓云中国石油塔里木油田分公司塔西南勘探项目部新疆泽普844804 中国石油塔里木油田分公司物探研究院新疆库尔勒841000

随着地质勘探的不断深入,对构造图的精度要求也越来越高,因此,对速度场建立和变速构造成图方法也提出了更高的要求。针对二维地震资料,在常规层位控制法速度建场基础上,利用优化的层控法,重点对叠加速度库和t0层位库有机结合,分块、分... 详细信息

随着地质勘探的不断深入,对构造图的精度要求也越来越高,因此,对速度场建立和变速构造成图方法也提出了更高的要求。针对二维地震资料,在常规层位控制法速度建场基础上,利用优化的层控法,重点对叠加速度库和t0层位库有机结合,分块、分段拾取各控制层t0时间变化率;在三维空间建层模型,计算层速度;基准面选取及校正;利用折射线追踪法进行时深转换;利用测井曲线入库,快速对层速度校正及钻井分层数据对深度图进行校正几个方面进行了研究,提高了成图精度,取得了理想的成图效果。

关键词：基准面校正控制三维精度层速度

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满加尔凹陷古生代等深积岩及其含油气性

新疆石油地质 1995年第2期16卷 123-126页

作者：王仁德石油物探局库尔勒研究中心

根据地震反射特征，结合区域构造、钻井取心资料分析，确认塔里木盆地满加尔凹陷古生代地层中发育的侵蚀凹槽，是等深流作用的结果，其中的充填物主要是由等深积岩组成并有少量浊积岩。这种等深积岩，由于距油源近，砂层发育且具有良好... 详细信息

根据地震反射特征，结合区域构造、钻井取心资料分析，确认塔里木盆地满加尔凹陷古生代地层中发育的侵蚀凹槽，是等深流作用的结果，其中的充填物主要是由等深积岩组成并有少量浊积岩。这种等深积岩，由于距油源近，砂层发育且具有良好的泥宕封盖条件，因而具有良好的含油气远景，应作为该区的油气勘探对象。

关键词：塔里木盆地满加尔凹陷古生代等深积岩含油气