德州凹陷古近系地层压力特征及油气运移方向

德州凹陷是目前临清坳陷东部唯一获得工业油流的凹陷.综合利用泥岩声波时差、实钻速度及实测地层压力,分析了德州凹陷的地下流体压力场特征,该区存在泥岩欠压实和异常高压.由于压力是引起流体运动最明显的动力,可以判识油气运移的方向,尤其是异常压力差,为了确定该区的油气运移方向,利用地震层速度计算出德州凹陷古近系地层压力层速度,T2与T6反射层之间层速度最高值位于德1--德4井之间,为3800 m/s,结合该区流体势的最高值为10 kJ/kg,计算出该区流体压力最高为35 MPa,位于德1--德4井之间及德古1井东,因此,该区油气运移的主要方向是向德6--德1井区运移.

Paleogene formation pressure and hydrocarbon migration direction,Dezhou sag

Dezhou sag is the only one which has gained commercial oil flow in the east part of Linqing depression.Characteristics of fluid pressure field are analyzed by acoustic time of mudstone,field velocity,and measured formation pressure,which indicates under-compaction in mudstone and abnormal pressure in this area.As pressure,particularly the abnormal pressure differential,is the most important force driving fluid to migrate,so,it can identify the direction of the petroleum migration.In order to recognize the d...