坳陷层断裂输导能力研究——以长岭地区为例

Study on Fault Transporting Capability in Depression Layer:A Case Study of Changling Sag

长岭凹陷坳陷层的油藏类型以断层一岩性复合藏为主,断裂的有效输导是成藏的关键因素之一。根据勘探程度的不同,可采用不同方法定性或定量研究断裂的输导能力。在勘探程度低的地区,可采用静态断层几何要素分析与动态断层活动性分析相结合的方法定性研究断层是否具有输导能力;在勘探程度高的地区,可开展启闭系数计算,定量分析断裂输导能力。综合上述方法,长岭凹陷断裂输导能力的研究取得了良好的效果,为断裂输导体系评价以及圈闭风险分析提供了依据。

The reservoir types in the depression layer of Changling Sag are mainly fault-lithology complex reservoir, in which the effectiveness of fault transporting is the key factor for hydrocarbon accumulation. According to the exploration degree, qualitative or quantitative method can be used in the study of fault transporting capability. In the area with lower exploration degree, the static analysis of the fault geometric elements, combined with the dynamic analysis of the fault activity, is commonly used to study the fault transporting capability qualitatively. In some areas with high exploration degree, it is generally quantitatively analyzed by calculating the sealing coefficient. The application of the methods mentioned above acquired quite good effects in Changling Sag, and provided a basis for evaluation of the fault transporting system and the analysis of trap risk.