东海盆地西湖凹陷平湖构造带超压系统与油气成藏
发布时间：2019-03-14 16:57
【摘要】：应用流体包裹体分析、盆地模拟和有机地球化学等手段,研究东海西湖凹陷平湖构造带超压系统与油气成藏的相互关系。研究结果表明:平湖构造带油气主要来源于平湖组煤系源岩,而且油气主成藏期为晚期,与生烃增压的形成期大致相同,另外油气藏多分布在超压顶界面附近,这些均指示超压与油气成藏存在密切关系;镜质体反射率、地温梯度及包裹体均一温度反映的热异常,储层物性、非均一捕获的包裹体、"气烟囱"反映的流体压力异常、凝析油轻烃组分反映的组分异常证实研究区流体在超压主导下晚期高效率快速流体;高压流体的泄压排放诱发断裂开启,并为流体运移提供动力,从而控制油气在超压界面附近高效成藏。
[Abstract]:By means of fluid inclusion analysis, basin simulation and organic geochemistry, the relationship between overpressure system and hydrocarbon accumulation in Pinghu structural belt of Xihu depression in the East China Sea is studied. The results show that the oil and gas in the Pinghu tectonic belt are mainly derived from the coal measure source rocks of the Pinghu formation, and the main reservoir forming period is late, which is about the same as that of hydrocarbon generation pressurization. In addition, most of the oil and gas reservoirs are distributed near the overpressure top interface. All of these indicate that there is a close relationship between overpressure and hydrocarbon accumulation. Vitrinite reflectivity, geothermal gradient and thermal anomalies reflected by homogeneous temperature of inclusions, reservoir physical properties, heterogeneous captured inclusions, fluid pressure anomalies reflected by "gas chimneys", The component anomalies reflected by the light hydrocarbon components of condensate oil confirm that the late high efficiency fast fluids in the study area are dominated by overpressure. The discharge of high pressure fluid leads to the opening of fracture and provides the power for fluid migration so as to control the high efficiency accumulation of oil and gas near the overpressure interface.
【作者单位】： 中国地质大学构造与油气资源教育部重点实验室;河北地质大学资源学院;甘肃省油气资源研究重点实验室中国科学院油气资源研究重点实验室;中国石油华北油田公司地球物理勘探研究院;中海油研究总院;中国石油华北油田公司科技信息处;
【基金】：国家重大科技专项(2011ZX05023-004-010)~~
【分类号】：P618.13
本文编号：2440171
[Abstract]:By means of fluid inclusion analysis, basin simulation and organic geochemistry, the relationship between overpressure system and hydrocarbon accumulation in Pinghu structural belt of Xihu depression in the East China Sea is studied. The results show that the oil and gas in the Pinghu tectonic belt are mainly derived from the coal measure source rocks of the Pinghu formation, and the main reservoir forming period is late, which is about the same as that of hydrocarbon generation pressurization. In addition, most of the oil and gas reservoirs are distributed near the overpressure top interface. All of these indicate that there is a close relationship between overpressure and hydrocarbon accumulation. Vitrinite reflectivity, geothermal gradient and thermal anomalies reflected by homogeneous temperature of inclusions, reservoir physical properties, heterogeneous captured inclusions, fluid pressure anomalies reflected by "gas chimneys", The component anomalies reflected by the light hydrocarbon components of condensate oil confirm that the late high efficiency fast fluids in the study area are dominated by overpressure. The discharge of high pressure fluid leads to the opening of fracture and provides the power for fluid migration so as to control the high efficiency accumulation of oil and gas near the overpressure interface.
【作者单位】： 中国地质大学构造与油气资源教育部重点实验室;河北地质大学资源学院;甘肃省油气资源研究重点实验室中国科学院油气资源研究重点实验室;中国石油华北油田公司地球物理勘探研究院;中海油研究总院;中国石油华北油田公司科技信息处;
【基金】：国家重大科技专项(2011ZX05023-004-010)~~
【分类号】：P618.13
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