地震反演技术在冀东油田A构造储层预测中的应用

Application of Seismic Inversion Technique in Reservoir Prediction of Structure A in Jidong Oilfield

分析了冀东油田A构造储层预测的难点,同时应用稀疏脉冲反演方法对A构造进行了反演,得到了各层段的砂岩厚度和砂岩百分含量,并以馆陶组一段为例进行了说明。反演中,密度受井径影响很大,应该对其进行校正,在分析储层岩石物理特征的基础上,给出了校正方法,使得砂、泥岩地层得到了很好的划分,缓解了砂泥岩波阻抗叠置的程度。依据地震反演提供的砂体分布,通过层位解释在A构造上成功部署了多口预探井和评价井。

The difficulty of reservoir predication in Structure A of Jidong Oilfield was analyzed,at the same time,the data of the structure A were processed with the method of sparse pulse inversion and the sand thickness and percentage content of each layer were obtained.The sand thickness and percentage content were described by taking Section Ng I for example.In the inversion,the density was affected seriously by caliper in well logging data and it should be corrected on the basis of the characters of reservoir physical properties,by which the sand-shale reservoirs were well divided and the overlaps of the sand-shale acoustic impendence were alleviated with the method of the correction technique.The sand distributions are predicted in the seismic inversion and some predicted and evaluated wells are deployed in Structure A.