东辛油田东营组泥岩沾污因子与断层封闭性关系探讨

An application to the relationship of shale smear factor and fault sealing properly of Dongying Formation, Dongxin oil field.

断层泥在断层封堵油气中起重要作用 ,研究断层泥分布的指标有多种。前人多认为断层泥岩沾污因子(SSF)值越接近 1.0 ,断层封闭性越强 ,断层封闭性随着该值增大而逐渐减弱。泥岩沾污因子小是断层封闭的必要条件 ,但不是充分条件。对东辛油田东营组的研究结果表明 ,SSF值约 2 .0时断层封闭程度最高 ,其油层的SSF界限值约为 4.3,低于此值断层的封闭性较好。由于泥岩沾污因子无法反映断层的断距、力学机制、生长性等因素对断层泥形成的影响 ,在具体研究中 ,应综合考虑其它因素对断层泥形成的影响 ,使计算结果更符合客观实际。图 2表 1参 4(王孝陵摘 )

It is importance of fault gouge sealing oil and gas. There are many indexes to study the distributing condition of fault gouge. In this article, the author studied the Dongying Formation's fault sealing properties of Dongxin oil field by using the shale smear factor (SSF), the study results show that the fault sealing degree is most high when the SSF is about 2.0; and there exists a limit value which is about 4.3 ; and small SSF is the essential condition of fault sealing, but is not the all conditions of that. Because SSF can not describe the all geologic courses of fault gouge forming in the process of studying, we should consider other factors affecting the distribution of fault gouge so that the effects accord with the facts.