Abstract:With the development of E#38;D circumstances in Shengli oilfield,looking for oil has been transformed from formerly mainly looking purely for structural reservoir into mainly looking for more sophisticated subtle reservoir now. As a kind of special subtle reservoir type,shale-fractured reservoir is widely distributed over Zhanhua,Chezhen,Dongying source depression in Jiyang Depression,in which commercial oil with high production has been obtained in multiple well,and has a great prospecting potential. Through systematic study of shale-fractured reservoir in Sasan section (S3) of Luojia area of Shengli oilfield,the paper divided the area into favorable sedi-mentary facies zone and considered that shale-fractured reservoir is easy to form in lime-shale development zone. According to the form of stress action,these stress fields have been dvided into fault stress,structural stress and stratigraphic stress. The study considered that using maximum structural curvity and stratigraphic anomalous high pressure to predict shale-fractured development zone is effective method. The paper summarized seismic reflecting feature that shale-fractured reservoir corresponds to negative reflection coefficient on positive polarity section and low-velocity feature. The amplitude and frequency characters for shale-fracture in a different geologic condition also are summarized by using forward modeling technique in the paper. The paper proposed a reconstituting technique for geophysical feature of shale-fractured reservoir,reconstituted geophysical characteristic curve for shale-fractured reservoir by using low lateral resistivity and 2. 5m resistivety log being representative of the region and achieved the desired and satisfied results in process of using real data.
苏朝光, 刘传虎, 高秋菊. 胜利油田罗家地区泥岩裂缝油气藏地震识别与描述技术[J]. 石油地球物理勘探, 2001, 36(3): 371-377.
Su Chaoguang, Liu Chuanhu, Gao Qiuju. Seismic identification and description technique for shale-fractured reservoir in Luojia area of Shengli oilfield. OGP, 2001, 36(3): 371-377.