The prospecting stress of the“antecedent type”dense sandstone gas is to find relatively high percolation sandstone. Based on this point of view, taking the Upper Paleozoic strata in eastern Ordos Basin as the subject investigated, considering“facies con-trolled reservoir”, combined with structural and sedimentary research findings, carried out well logging constrained inversion to find rel-atively high percolation quality reservoir. Successful prediction of favorable reservoirs in the study area has shown that based on geolog-ical and well logging data, using quasi-acoustic wave reconstruction technology can improve logging trace lithologic identification abili-ty effectively and provide wave impedance threshold for sandstone identification. Using automatic iterative wavelet scanning to get the best wavelet in every well and practiced multiple wavelets participation in inversion simultaneously, thus can obtain optimum matching of the initial model and well-side seismic data. Besides, during geological modeling, in allusion to sedimentary features of different res-ervoirs, selecting different interpolation pattern and carrying out sector inversion in order to identify favorable zones and optimum tar-gets in various sectors effectively.%“先成型”致密砂岩气的勘探重点是寻找相对高孔渗砂岩，基于该观点，以鄂尔多斯盆地东缘上古生界为研究对象，以“相控储层”为思路，结合构造、沉积等研究成果，开展测井约束反演工作，以此寻找相对高孔渗优质储层。研究区有利储层较为成功的预测表明，依据地质、测井资料，采用拟声波重构技术可有效提高测井曲线岩性识别能力，并为砂岩识别提供波阻抗门槛；利用自动迭代子波扫描求取每口井的最佳子波，实行多个子波同时参与反演，可获得初始模型与井旁地震数据的最佳匹配。另外在构建地质模型时，针对不同储层的沉积特点，选取了不同的插值方式进行分段反演，有效划分出不同层段中有利区带及最佳目的层段。
展开▼
