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地质力学学报:2007,13(4):355-367
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塔中地区油气成藏主控因素及成藏规律研究
(1.中国科学院海洋研究所, 山东 青岛 266071;2.中国科学院研究生院, 北京 100049;3.中原油田物探研究院, 河南 濮阳 457001)
DOMINANT CONTROLLING FACTORS AND REGULARITIES OF FORMATION OF PETROLEUM ACCUMULATIONS IN THE TAZHONG AREA
(1.Qingdao Institute of Oceanography, Chinese Academy of Sciences, Qingdao 266071, Shandong, China;2.Graduate School, Chinese Academy of Sciences, Beijing 100049, China;3.Geophysical Research Institute of the Zhongyuan Oilfield Co. Ltd., SINOPEC, Puyang 457001, Henan, China)
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投稿时间:2007-05-19    
中文摘要: 塔中地区油气成藏复杂,影响因素较多。通过对已钻井油气藏的分析,认为该区影响油气成藏的控制因素有①烃源岩;②运移通道(断层控制油气纵横向分布、运载层对油气的横向运移作用、不整合面对油气的横向运移控制);③构造类型(圈闭类型、构造样式、成油期古隆起);④构造演化;⑤储层物性及展布;⑥储盖组合;⑦火成岩对油气藏的影响。成藏规律为①圈闭和油源断层是东河组成藏的必要条件;②构造与储层控油、多期成藏、后期充注是志留系成藏的基本特征;③储层发育程度是奥陶系成藏的关键;④油气多期充注造成多层系含油、南北分异的成藏特点。该区油气成藏条件好,勘探程度较高。尤其奥陶系碳酸盐岩油气藏以类型多、含油气井段长,其形态受不规则孔、缝、洞储层的控制,非均质性极强,储层发育程度是奥陶系油气富集的主控因素。
Abstract:Because of many influence factors, the formation of petroleum accumulations is complex in the Tazhong area.Analysis of drilled petroleum accumulations shows that the main controlling factors affecting the formation of petroleum accumulations in the area include:① source rock;② migration channels (faults controlled the vertical and lateral distribution of petroleum, carrier layers affected the lateral movement of petroleum and unconformity controlled the lateral movement of petroleum);③ types of structure (types of trap, structure styles and paleo-uplift during petroleum generation);④ tectonic evolution;⑤ physical properties and distribution of accumulations;⑥ reservoir and seal association; and ⑦ influence of igneous rocks on petroleum accumulations.The regularities of formation of accumulations are as follows:① traps and source-related faults are necessary conditions for the formation of accumulations in the Donghe sandstone;② controls of structure and reservoir on petroleum, multistage formation of accumulations and later-stage injection are basic features of Silurian formation of accumulations;③ the degree of development of accumulations is the key to the formation of Ordovician accumulations;and ④multi-stage injection of petroleum produced the features of occurrence of petroleum in several layers and north-south differentiation.The study area is characterized by good conditions for formation of petroleum accumulations and a higher level of exploration, and it is particularly the case with the Ordovician carbonate petroleum accumulations which are marked by more types and longer petroleumbearing well intervals.Their shapes were controlled by irregular pores, cracks, and cavities because of their very strong heterogeneity.The reservoir quality is the dominant controlling factor for the concentration of Ordovician petroleum.
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刘春晓,钱利,邓国振,2007.塔中地区油气成藏主控因素及成藏规律研究[J].地质力学学报,13(4):355-367.DOI:
LIU Chun-xiao,QIAN Li,DENG Guo-zhen,2007.DOMINANT CONTROLLING FACTORS AND REGULARITIES OF FORMATION OF PETROLEUM ACCUMULATIONS IN THE TAZHONG AREA[J].Journal of Geomechanics,13(4):355-367.DOI:

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