南海琼东南高压盆地压力结构与油气成藏关系

发布时间：2018-04-19 15:57

本文选题：琼东南盆地 + 超压　；参考：《地球物理学进展》2017年04期

【摘要】：南海琼东南盆地为典型的高温超压盆地,在中深层高温超压地层中发育多个大型勘探目标,是中国南海勘探主战场.琼东南盆地存在多种超压成因,使得不同构造位置的压力结构不同,不同的压力结构其压力成因存在差异,并且压力结构与油气的成藏也具有非常密切的关系,而且地层压力结构与钻井安全息息相关.为了提高压力预测精度和钻井安全,研究琼东南高压盆地压力结构与油气成藏关系是十分有意义的.快速沉积的欠压实泥岩排水不畅是超压的主要成因,同时还存在断裂系统泄压、大型沉积体疏导泄压和侧向砂体传递增压等多种成因.本文首先总结不同位置的压力结构,其次分析不同压力结构的成因,最后在超压与油气聚集分析的基础上,总结超压与油气聚集成藏的关系,分析认为崖城凸起砂体泄压型低压带和大崖城区异常高压带是琼东南盆地最有利的勘探区带.
[Abstract]:Qiongdongnan basin in the South China Sea is a typical high-temperature and overpressure basin. It has developed many large exploration targets in the high temperature and overpressure strata in the middle and deep layers and is the main battlefield of the exploration in the South China Sea.There are many kinds of overpressure origin in Qiongdongnan basin, which make the pressure structure of different tectonic position different, and the pressure structure of different pressure structure have different pressure origin, and the pressure structure also has very close relation with oil and gas accumulation.Moreover, formation pressure structure is closely related to drilling safety.In order to improve the accuracy of pressure prediction and drilling safety, it is very significant to study the relationship between pressure structure and hydrocarbon accumulation in Qiongdongnan high-pressure basin.Poor drainage of rapidly deposited undercompacted mudstone is the main cause of overpressure. At the same time, there are many causes such as pressure relief of fault system, drainage pressure of large sedimentary body and transfer pressure of lateral sand body, etc.This paper first summarizes the pressure structure at different locations, then analyzes the causes of the different pressure structures, and finally, on the basis of the analysis of overpressure and oil and gas accumulation, summarizes the relationship between overpressure and hydrocarbon accumulation.It is considered that the Yacheng uplift sandbody relief type low pressure zone and the abnormal high pressure zone in Daya urban area are the most favorable exploration zones in Qiongdongnan Basin.
【作者单位】：中海石油(中国)有限公司湛江分公司;
【基金】：国家十三五重大专项2016ZX05024-005”莺琼盆地高温高压天然气富集规律与勘探开发关键技术(三期)”项目支持
【分类号】：P618.13

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