波阻抗反演技术在准格尔煤田勘探中的应用

摘要

波阻抗反演技术的核心是将垂向分辨率较高测井资料与横向分辨率较高的地震剖面相结合,把界面性的地震资料转换成可与测井资料对比,具有岩性特征及明确地质意义的波阻抗成果.以准格尔煤田三维地震勘探为例,通过波阻抗反演,介绍了断层,陷落柱,煤层变薄、缺失、分叉、合并,基底塌陷与凹陷等地质因素在波阻抗剖面上的响应特征,与常规地震时间剖面相比,其对构造解释更加精细,对地层形态描述更加准确.有效的提高了综合解释的精度.%The core of wave impedance conversion technology is combined vertical higher resolution well logging data with transversal higher resolution seismic section, conversed interfacial seismic data can compare with well logging data that is provided with lithologic characteristics and specific geological significance wave impedance result. Taking 3D seismic prospecting in the Jungar coalfield as ex?ample, through wave impedance conversion, introduced response features of geological factors including fault, subsided column, coal seam thinning, hiatus, splitting, merging, basement subsidence and depression etc. on wave impedance section. Compared with conven?tional seismic time section, its structural interpretation is more precise, stratigraphic pattern description more exact. In this way has ef?fectively improved comprehensive interpretation accuracy.