正演和反演法综合厘定珠一坳陷油气成藏期

发布时间：2018-03-03 12:25

本文选题：成藏期　切入点：圈闭发育史　出处：《断块油气田》2017年03期 　论文类型：期刊论文

【摘要】：目前基于地化分析的反演方法厘定的珠一坳陷成藏期,存在不少疑惑,难以解决。文中在前人地球化学方法研究成果的基础上,从正演角度出发,通过恢复埋藏史和排烃史,综合厘定油气的成藏期次。研究结果表明:珠一坳陷不同地区洼陷排烃序列不同,显示了油气成藏期存在差异,其中,对古近系油藏而言,位于恩平中半地堑表现出2期成藏;惠西半地堑油藏表现出3期成藏;西江南半地堑、惠北半地堑、陆丰南半地堑和陆丰北半地堑古近系油藏存在1期成藏;新近系油藏,成藏期主要分布在10.0~0 Ma。另外,烃源岩的主排烃期与圈闭的形成期和晚期构造活动相匹配,具有持续充注的特点。以上研究表明,含油气盆地不存在统一不变的成藏期,它们随着烃源岩生排油气条件和构造演化条件不同而改变。
[Abstract]:At present, there are many doubts in the reservoir forming period of Zhuyi depression determined by inversion method based on geochemistry analysis, which is difficult to solve. Based on the research results of previous geochemical methods and from the perspective of forward modeling, the burial history and hydrocarbon expulsion history are restored in this paper. The results show that the sequence of hydrocarbon expulsion in different areas of Zhuyi depression is different, which indicates that there are differences in hydrocarbon accumulation period, among which, for Paleogene reservoirs, there are two reservoirs in the middle half graben of Enping. The reservoir of Huixi half graben shows 3 stages of reservoir formation, the reservoirs of the West Jiangnan half graben, the Huibei half graben, the Lufengnan graben and the Lufeng North graben Paleogene exist in one stage, while the Neogene reservoir is mainly distributed in 10.0 0 Ma. in the Neogene reservoir, there are two types of reservoirs in the West Jiangnan graben, the Huibei graben and the Lufeng North graben. The main hydrocarbon expulsion stage of the source rock is matched with the trap forming stage and late tectonic activity, and has the characteristics of continuous filling. The above studies show that there is no uniform and invariant reservoir forming period in the hydrocarbon bearing basin. They change with the source rocks generating and expelling oil and gas conditions and tectonic evolution conditions.
【作者单位】：中海油南海东部石油管理局研究院;
【基金】：国家科技重大专项课题“近海大中型油气田形成条件与分布”(2011ZX05023-006)
【分类号】：P618.13

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