用成像测井资料精细描述吴家1井井旁构造形态

USING IMAGING LOGGING DATA TO FINELY DELINEATE THE STRUCTURE SHAPES ADJACENT TO THE WELL WUJIA-1

在四川盆地,特别是盆地边缘,井下构造复杂。而在构造复杂带地震资料往往品质差,甚至无信号,钻井的风险增大。应用测井资料可对井下构造形态进行精细解释,从而为地震资料解释提供精细的构造细节。针对吴家1井下三叠统飞仙关组至上二叠统大隆组的地层增厚复杂情况,运用成像测井资料进行小层的精细对比和地层倾角的拾取,从而弄清了其复杂的构造特征,这对吴家坝构造的下步勘探具有重要意义,同时也证明了成像测井资料在解释复杂构造带井下构造细节方面具有不可替代的作用。

The downhole structure is very complicated in the Sichuan Basin,especially in the margin of the basin.Moreover,the seismic data quality in the complex structure zone is poor,and there isn't any useful signal in some area,which will increase the drilling risks.The downhole structure shapes can be finely interpreted with the logging data,and can provide subtle structure details for seismic data interpretation.Aimed at the complicated thickening situations of the strata between Feixianguan formation in Lower Triassic and Dalong formation in Upper Permian in well Wujia-1,the paper performed the fine small strata correlations and strata dip picking with imaging logging data,and ascertained the complex structure features there,which will have great significance for the future seismic explorations in Wujiaba structure.At the same time,it is verified that the imaging logging data have remarkable roles in interpreting downhole structure details in the complex structure zones.