不同方向运移油气在断裂附近聚集特征的差异性

为了研究断裂在含油气盆地断裂发育区油气聚集与分布的作用,通过不同方向运移油气聚集与对油气运聚所起不同作用断裂之间关系分析,对不同方向运移油气在断裂附近聚集特征的差异性进行了研究,结果表明不同方向运移油气在断裂附近聚集特征的差异性主要表现在3个方面:不同方向运移油气在断裂附近聚集层位不同,垂向运移油气在输导断裂附近多层聚集分布,而侧向运移油气在遮挡断裂附近聚集层位相对较少;不同方向运移油气在断裂附近剖面聚集部位不同,垂向运移油气主要在输导断裂上盘聚集分布,而侧向运移油气主要在遮挡断裂下盘聚集分布;不同方向运移油气在断裂附近平面聚集部位不同,垂向运移油气在输导断裂凸面脊处聚集分布,而侧向运移油气在遮挡断裂转换带处聚集分布。开展不同方向油气在断裂附近聚集特征的差异性研究,为含油气盆地断裂发育区油气勘探提供了指导。

DIFFERENCES OF THE OIL-GAS ACCUMULATION CHARACTERISTICS NEAR THE FAULT FROM DIFFERENT DIRECTIONS

In order to study the effects of the faults on the hydrocarbon accumulation and distribution in the welldeveloped fault zone in the petroleum-bearing basin,through research the relationships among the effects for the different-direction oil-gas migration and accumulation,the differences of the hydrocarbon accumulation near the fault were figured out.The achievements show that the differences are shown as follows:for the differently migrated and accumulated petroleum near the fault,the vertically migrated oil and gas are prone to mainly accumulate in the form of the multiple horizons near the transporting fault,while the laterally migrated and accumulated hydrocarbon,the conditions are on the contrary;the different oil and gas are correspond to the different accumulated positions near the fault section,in detail,the vertical is principally accumulated on the upper wall of the transporting fauh,while the lateral is generally enriched on the lower wall of the barrier fault;the planar enriched properties are the same,the vertical is accumulated and distributed along the convex ridge of the transporting fault,while the lateral is done along the transfer zone of the barrier fault.The conducted difference researches on the accumulated characteristics for the different migrated petroleum near the fault have provided a certain guide for the hydrocarbon exploration in the well-developed fault block in the petroleum-bearing basin.