恩平凹陷含油气系统划分与评价

Division and evaluation of hydrocarbon-bearing system in Enping Sag

以含油气系统理论为指导,应用含油气系统模拟及综合分析技术分析了恩平凹陷含油气系统的基本地质要素和成藏作用过程,划分了不同层次的含油气系统,并在分析主要含油气系统特征的基础上,从规模与类型、油气充注能力及生成聚集效率等方面对次洼级别的含油气系统进行了评价。研究表明,恩平凹陷具备形成油气系统的良好条件,可划分出17洼、18洼和12洼3个相对独立的子含油气系统及更次一级的含油气系统,其中17洼子含油气系统具有规模大、充注能力强及较高的生成聚集效率等特征,是恩平凹陷油气勘探的主要对象。

The basic geologic elements and the hydrocarbon accumulation process of Enping Sag are analyzed and the hydrocarbonbearing systems of different levels are divided using hydrocarbon-bearing system simulation and comprehensive analysis technology under the guidance of hydrocarbon-bearing system theory. The hydrocarbon-bearing systems of sub-sag level are evaluated from scale and type,hydrocarbon filling capacity and hydrocarbon generation and accumulation efficiency of hydrocarbon-bearing systems. It is shown that there are good conditions forming hydrocarbon-bearing system in Enping Sag,the hydrocarbon-bearing system in Enping Sag can be divided into 3 relatively independent sub-hydrocarbon-bearing systems of EP17,EP18 and EP12 and their secondary hydrocarbon-bearing systems. Of three sub-hydrocarbon-bearing systems,EP17 is of larger scale,stronger hydrocarbon filling capacity and higher hydrocarbon generation and accumulation efficiency,and it is main oil and gas exploration target in Enping Sag.