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鄂尔多斯盆地临兴-神府区块上古生界致密砂岩储层渗透率低,孔隙类型多样,非均质性强,导致岩石物理响应特征复杂,气层识别难度大,结合研究区致密砂岩储层特点以及气层的测井响应特征,形成了图版法、三孔隙度重叠法、测井-气测综合解释法等快速识别方法,并基于偶极横波测井,建立了弹性模量差比、纵波等效弹性模量差比法、泊松比与体积压缩系数交会法等气层识别指标,通过实际资料处理和试气资料成果验证,该方法在低渗透砂岩气层识别中具有较好的应用效果,为致密砂岩气层测井识别与评价提供了有效途径。
The tight sandstone reservoirs of the Upper Paleozoic in the Linxing-Shenfu block of the Ordos Basin have low permeability, diverse pore types and strong heterogeneity, resulting in complex petrophysical response characteristics and difficulty in identifying gas reservoirs. Combining with the tight sandstone reservoirs in the study area Characteristics and gas well logging response characteristics, the formation of the plate method, three porosity overlap method, well logging - gas comprehensive interpretation method and other rapid identification methods, and based on dipole transverse wave well logging, the establishment of the elastic modulus difference ratio, Compressional modulus of elasticity (PGE), Poisson’s ratio and volumetric compression coefficient (FCE), etc. Through the actual data processing and the test gas data validation, this method has good performance in the identification of low permeability sandstone gas reservoirs Application results provide an effective way for the logging identification and evaluation of tight sandstone gas reservoirs.