沉积体系域控制下的岩性油气藏预测方法研究及应用——以鄂尔多斯盆地北部中生界延长组岩性油气藏为例

The research and application of lithologic hydrocarbon reservoirs prediction in sedimentary system tract——An example from Mesozoic Yanchang Formation in northern Ordos Basin

针对陕北中生界延长组岩性油气藏的主控因素,依据黄土塬地区地震弯曲测线,充分利用有效的地震信息对目的层开展地震储层横向预测,在剖面上对渗透性砂岩展布的识别总结出5种方法,并且在平面上编制渗透性砂岩展布范围图,为探井井位部署提供了一定的依据;通过后期完钻井检查,其渗透性砂层厚度预测符合率达80%以上。

Referring to the master factors of lithologic hydrocarbon reservoirs of Yanchang Formation, the authors make full use of the effective seismic information on the basis of the curve lines in Huangtuyuan area to carry out seismic reservoir lateral prediction in target stratum. Five methods summarized according to the identification of the permeable sandstone distribution section and plane figures of permeable sandstone distribution provide some evidences for drilling location. The late drilled well assessment proves that the coincidence rate of the permeable sand thickness prediction is over 80%.