应用三维地震波形分类技术精细预测双家坝区块飞仙关组鲕滩储集体

APPLICATION OF 3D SEISMIC WAVEFORM CLASSIFICATION TECHNIQUE TO PREDICT OOLITIC RESERVOIR BODY IN FEIXIANGUAN FORMATION,SHUANGJIABA BLOCK

以往的研究认为川东地区双家坝七里8井以南区块处于台缘相带,是飞仙关组鲕滩发育的有利地区。将三维地震波形分类技术及新钻井资料相结合,分析认为双家坝区块七里8井以南是靠台内或台缘内的相带,而台缘相带分布在双家坝区块北部,即七里8—七里22井之间,是鲕滩储层发育的有利相带。在此基础上,通过三维地震资料识别出鲕滩储层的分布,进一步深化了该区块飞仙关组鲕滩储集体认识,对拓展该区块的勘探领域,具有技术支撑作用。

Previous study suggests that the block to the south of Qili 8 well in Shuangjiaba area,eastern Sichuan Basin,belongs to platform margin facies;moreover,it is favorable for the oolitic- shoal development of Feixianguan Formation.After adopting 3D seismic waveform classification technique and new drilling data,it is deemed that to the south of Qili 8 well belongs to the facies near inside platform or platform margin,while the platform margin facies are distributed in the north(just between Qili 8 and Qili 22 wells),where is favorable for the development of oolitic- shoal reservoir.In addition,the distribution of oolitic- shoal reservoir is identified through 3D seismic data in order to further understand the oolitic reservoir body of Feixianguan Formation.