桑塔木地区三叠系深部地震薄储集层预测

Seismic thin reservoir prediction in deep zones: a case study of Triassic Formation
in Tarim Basin

 汪佳蓓¹ 黄捍东 3 张文珠⁴

中国地质大学（北京）能源学院，北京 100083 中国石油大学（北京）油气资源与探测国家重点实验室，北京 102249 中国石油大学（北京）提高采收率研究院，北京 102249 中海石油深圳分公司研究院，广东 广州 510240）

School of Energy Resources, China University of Geosciences, Beijing 100083, China State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China EOR Research Institute, China University of Petroleum, Beijing 102249, China Research Institute, Shenzhen Branch of CNOOC Ltd., Guangzhou 510240, China)

 深部隐蔽油气藏逐步成为现阶段油气勘探的重难点，其具有埋深大、地震信号弱、构造复杂等特征。埋藏深度的增大使得地震反射信息量减少，识别储集层尤其是薄储集层的难度加大。文中采用地震相控非线性随机反演方法，融入测井和层序界面等地质类信息，对桑塔木油田三叠系近5 000 m埋深的薄储集层进行了钻前预测，成功刻画了深层薄储集层的纵横向连通性及平面展布特征。通过未参与反演井预测效果分析，少井反演与多井反演效果对比，预测吻合率统计分析和新钻井与预测结果对比等方面来评价本次地震资料储集层预测的可信度。预测结果与实钻情况吻合程度较好，说明该方法在深层薄储集层预测中有很好的应用前景。

 As the development of oil and gas exploration, people are gradually focusing on the prospecting of reservoir in deep zones. Seismic reflection information will decrease as the depth increases. The identification of reservoir especially thin-layer reservoir becomes much more difficult. In this paper, the seismic phase-controlled non-linear random inversion method is used to predict the Triassic Formation in Sangtamu Area, where depth is nearly 5000 m, before drilling by taking logging, geological information as constraints. The lateral connectivity and plane distribution characteristics in deep thin reservoir are successfully portrayed. Through the contrast of the inversion results in different constraints such as no drilled-well constraint and less well constraints, speed inversion profile characteristics are analyzed. With the new drilling information to authenticate the inversion results, which shows that the prediction coincides with the real drilling situation and the seismic prediction method has good creditability and applicability in the process of deep reservoir exploration and development.

10.6056/dkyqt201604009