异常高压与油气充注的耦合性——以东海陆架盆地西湖凹陷花港组和平湖组为例

发布时间：2018-03-13 10:15

本文选题：异常高压　切入点：油气充注　出处：《石油实验地质》2017年02期 　论文类型：期刊论文

【摘要】：基于声波时差测井、有机地球化学测试及包裹体测试等资料,对东海陆架盆地西湖凹陷花港组和平湖组异常高压进行了研究。西湖凹陷花港、平湖组异常压力主要起始于花港组下段,并且异常高压段具有"阶梯式"增大的特征,横向上从平湖构造带至西次凹向中央反转构造带及从凹陷的边缘向凹陷的中部,高压顶界面在地质层位上有变老的趋势。由高压流体注入引起的传导型超压在区内目的层发育,并对应着良好的油气储层,说明了异常高压发育与油气充注空间上的一致性。利用盆模软件模拟出剩余地层压力的演化过程,认为中新世(15~7 Ma)以及上新世至第四纪(3~0 Ma)是剩余地层压力异常的2个关键时期。结合油气充注史研究认为,中—晚中新世和早上新世该区发生了2次油气充注,说明异常高压发育与油气充注时间上的一致性。因此,证明了西湖凹陷花港、平湖组异常高压与油气充注具有良好的时空耦合性。
[Abstract]:Based on the data of acoustic time difference logging, organic geochemistry and inclusion testing, the abnormal high pressure of Huagang formation and Pinghu formation in Xihu sag of the East China Sea are studied. The abnormal pressure of Pinghu formation is mainly originated from the lower part of Huagang formation, and the abnormal high pressure section has the characteristics of "step by step" enlargement, horizontally from the Pinghu tectonic belt to the west subconcave to the central inverted structural zone and from the edge of the sag to the middle part of the sag. The high pressure top interface has a tendency to grow old in the geological horizon. The conductive overpressure caused by high pressure fluid injection develops in the target layer of the area and corresponds to a good oil and gas reservoir. It is shown that the development of abnormal high pressure is consistent with that of oil and gas filling space. The evolution process of residual formation pressure is simulated by using basin model software. It is considered that Miocene and Pliocene to Quaternary are two key periods of residual formation pressure anomaly. Combined with the study of oil and gas filling history, it is concluded that there were two oil and gas charges in Miocene and early Pleistocene in Miocene and early Pleistocene. The development of abnormal high pressure is consistent with the time of oil and gas charging. Therefore, it is proved that the abnormal high pressure of Xihu sag and the abnormal high pressure of Pinghu formation have good spatiotemporal coupling with oil and gas charging.
【作者单位】：油气藏地质及开发工程国家重点实验室(成都理工大学);中海石油(中国)有限公司上海分公司;
【基金】：中海油上海分公司重点项目(CCL2014SHPS0014RSI)资助
【分类号】：P618.13

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