| 库车拗陷依奇克里克构造带油气输导体系特征及输导模式 |
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| 作者姓名： | 尚晓庆 刘洛夫 高小跃 姜振学 刘国东 |
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| 作者单位： | 中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学(北京)盆地与油藏研究中心 |
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| 基金项目： | 国家科技重大专项(2008ZX05003-002);油气资源与探测国家重点实验室项目(prp2009-02) |
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| 摘 要： | 成藏期输导体系的演化模式及有效性验证是库车拗陷依奇克里克构造带油气成藏研究的重点和难点.根据断裂活动期和断层性质、砂体连通性和物性、不整合面上下地层接触及岩性配置关系,研究输导体系组合及演化特征;综合运用QGF、QGF-E及甾烷C29ββ/(αα+ββ)、三环萜烷/17(α)-藿烷等地球化学参数识别油气运移通道和运移方向,验证输导体系的有效性.在输导体系组合及演化特征和有效性验证研究的基础上,建立研究区的输导模式.结果表明:成藏早期位于研究区南部依南地区的主要输导体系类型为不整合面-输导层输导体系,成藏晚期输导体系以输导层输导为主、盐下油源断层及不整合面输导为辅;北部依深地区在成藏早期主要输导体系为盐下油源断裂-不整合面-输导层输导体系,成藏晚期输导体系为穿盐断层,油气先沿断层向上部层系调整,后沿通天断层断至地表散失.不同地区、不同成藏期的输导体的差异形成现今北部贫化而南部富集的油气分布格局.
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| 关 键 词： | 输导体系演化 输导模式 地化示踪 依奇克里克构造带 库车拗陷 塔里木盆地 |
Characteristics of hydrocarbon pathway system and transport model of the Yiqikelike structural belt in Kuqa Depression |
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| Authors: | SHANG Xiao-qing LIU Luo-fu GAO Xiao-yue JIANG Zhen-xue LIU Guo-dong |
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| Institution: | 1,2(1.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;2.Basin and Reservoir Research Center,China University of Petroleum(Beijing),Beijing 102249,China) |
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| Abstract: | The evolution model and effectiveness verifying of the pathway system are very important and difficult for petroleum accumulation research in the Yiqikelike structural belt of Kuqa Depression.The conduit model is established on features of combination,evolution and effectiveness of the pathway system.The research of combination and evolution features of the pathway system was based on the fault activity periods and fault properties,sand connectivity and physical properties,lithology combinations and stratigraphic contact relationships above and below the unconformity,while the effectiveness of the pathway system was verified by a synthesis application of geochemical parameters such as QGF,QGF-E,Steroid C29ββ/(ββ+αα),tricyclic terpane to 17α(H)-hopane and so on,which traced the petroleum migration channel and direction.The research shows that: In the Yinan Area of the southern Yiqikelike structural belt,the main pathway system consists of unconformity and carrier during the early period of hydrocarbon accumulation.The pathway system is mainly carrier with the assistant unconformity and fault under salt during the late period of hydrocarbon accumulation.In the Yishen Area of the northern Yiqikelike structural belt,the earlier pathway system consists of fault under salt,unconformity and carrier while the later pathway system is principally fault under salt with the unconformity and carrier in second.The hydrocarbon migrated to the upper formations through the faults,and then lost when faults pierced the surface.The conduit system are diverse in different hydrocarbon accumulation periods and areas,which contributes to the current oil and gas distribution pattern that impoverished in the north while enriched in the south. |
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| Keywords: | evolution of pathway system transport model geochemical tracing Yiqikelike structural belt Kuqa Depression Tarim Basin |
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