王家岗油田断层启闭性的地球化学判识方法

A geochemical method of fault sealing discrimination in Wangjiagang Oilfield

断层的启闭性是控制油气运移和聚集的关键因素,但对此一直缺少有效的判识方法。文中以东营凹陷南斜坡王家岗油田为研究区,根据断层带流体活动的方式和地化生标参数的运移示踪作用,在原油地化特征分析及其来源确定的基础上,通过断层两盘油藏中原油成因类型的对比分析,对典型剖面控油断层在油气运移时期表现出来的启闭性特征进行了判识,分析了断层对油气运聚成藏的控制作用。研究表明,该方法作为一种新的断层启闭性研究手段,能够更为科学、有效地提供断层启闭性的信息,对断层启闭性的判识具有一定的应用价值。

Fault sealing is the key factor of controlling the hydrocarbon migration and accumulation, but effective method to discriminate the fault sealing has been absent. In this paper, according to active patterns of the fluid in fault belt and the tracing application of biomarker, Wangjiagang Oilfield in the suuthem slope of Dongying Dpression is regarded as study area, and sealing characteristics shown in hydrocarbon migration period of oil-controlling fault with typical profile is discriminated through the analysis of crude oil genesis type in the reservoir of two walls of fault, based on the geochemical characteristics analysis and source determination of crude oil. Controlling action of fault on hydrncarbon migration and accumulation is analyzed. The research indicates that this method can effectively provide the information of fault sealing as a new study measure of fauh sealing, which has the definite application value for the discrimination of fault sealing.