小型断块圈闭综合评价——以钱官屯地区为例

Comprehensive evaluation of small fault trap——A case study of Qianguantun area

小型断块圈闭是陆相断陷盆地最重要的圈闭类型之一。本文以钱官屯地区为例,从圈闭规模、几何形态、断层活动、构造背景等几个方面对断块圈闭进行了定性评价。根据地层对接和泥岩涂抹两种封闭机理,应用计算机手段开展了断层封闭性的定量预测,并结合地质条件,分析了涂抹作用对断层封闭性的影响程度。

Small fault trap is one of the important trap types in continental fault basin. This paper takes Qianguantun area as an example to qualitatively evaluate this fault trap in terms of size, geometry, fault movement, and structural setting. According to sealing mechanism of strata joining and mudstone smearing, fault sealing ability has been quantitatively projected through computer method. The effect of smearing on fault sealing ability is also analyzed with consideration of geologic conditions.