王府凹陷青山口组地层超压及油气运移深度研究

为了弄清松辽盆地王府凹陷青山口组地层超压对扶余油层油水包络面深度的控制作用,进一步指导油气勘探,通过研究青山口组泥岩超压的形成时期以及超压大小,并分析研究区内139口井点的超压值与扶余油层油底深度的关系。对王府凹陷扶余油层油水包络面深度进行研究。结果表明:王府凹陷青山口组源岩异常高压主要形成于明水组末期,超压在凹陷中心约为7 MPa;研究区扶余油层油水包络面深度与上覆青山口组地层超压的拟合关系为y=-5.171 7x2+68.764x-24.71,油气向下运移的距离约为120—200 m。

Research On Overpressure In Qingshankou Formation Of Wangfu Depression And The Depth Of Hydrocarbon Migration

In order to clarify the control action of overpressure on oil-water envelop surface in Fuyu reservoir of Wangfu Depression in Songliao Basin, through researching the overpressure of Qingshankou mudstone formation period, size and analyzing the relationship between super pressure size and Fuyu bottom oil layer depth of 139 data points in Wangfu Depression to research bottom oil layer depth of Fuyu reservoir. The results showed that: the abnormal high pressure in source rock of Qingshankou Fm in Wangfu Depression was formed in late age of Mingshui Fm, overpressure is about 7 MPa in the depression center, the fitting formula of oil-water envelop surface depth in Fuyu Fm and the overpressure size in Qingshankou Fm is y=-5.1717x2 68.764x-24.71, according to the fitting formula, calculating the hydrocarbon migration depth in Fuyu Formation is about 120-200m.