论文部分内容阅读
A油田油藏类型以断层-岩性油藏为主,为了更好地了解断层在油气成藏过程中的作用,评价断块含油性,针对油藏地质特点和断裂特征,利用断层泥比率SGR及其计算公式,研究了A油田的断层封闭性及其影响因素,得出4个结论:受西北向挤压应力的影响,东北向延伸的断层垂向封闭性好于其它方向的断层;断距越大,下盘与青山口组泥岩对接层段越长,断层的封闭性越好;同一条断层在不同位置、不同深度封闭性均有差异,在研究层段内断层上部封闭性要好于下部;在未与青山口组地层对接的层段,断层封闭性主要受地层泥岩含量影响,泥岩含量越大封闭性越好。
In order to better understand the function of faults in the process of hydrocarbon accumulation, oilfields of A oilfields are characterized by fault-lithologic reservoirs. In view of the reservoir geological characteristics and fracture characteristics, fault mud ratio SGR And its calculation formula, the fault sealing property of A field and its influencing factors are studied. Four conclusions are drawn: the vertical sealing of the fault extending in northeast direction is better than that in other directions due to the influence of the compressional stress in the northwest; The bigger the distance is, the longer the butt-jointing interval of mudstone and the lower one is, and the better the sealing of the fault is. The same fault has different sealing ability at different positions and depths, and the upper fault seal in the research interval is better than In the interval that is not connected with the Qingshankou formation, the fault sealing is mainly affected by the mudstone content in the formation. The larger the mudstone content, the better the sealing.