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

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.