摘要
鄂尔多斯盆地东缘发育典型致密砂岩气储层,复杂孔隙结构导致"非阿尔奇响应",使得致密储层油气水层电阻率基本相当,流体性质识别难度大。通过分析该区域致密砂岩储层声学响应特征,发现纵横波速度比、泊松比等参数对含气变化响应敏感。基于地震岩石物理Gassmann理论,结合阵列声波等测井数据,建立了包含岩石孔隙、骨架、混合流体的模量模型,最终获得混合流体模量。研究区测试井实例表明,基于流体置换方法的致密砂岩气层识别具有重要作用。
Typical tight sandstone gas reservoirs are developed in the eastern margin of the Ordos Basin.The complex pore structure leads to"non-Architic response",which makes the resistivities of oil,gas,and water layers in tight reservoirs are basically the same,and it is difficult to identify fluid properties.By analyzing the acoustic response characteristics of tight sandstone reservoirs in this area,it is found that parameters such as the P-wave velocity ratio and Poisson's ratio are sensitive to changes in gas-bearing changes.Based on the seismic rock physics Gassmann theory,combined with array acoustic wave and other logging data,a modulus model including rock porosity,skeleton,and mixed fluid was established,and finally the mixed fluid modulus was obtained.Examples of test wells in the study area show that the identification of tight sandstone gas layers based on fluid replacement methods plays an important role.
作者
王文文
WANG Wenwen(Oilfield Technology Department,China Oilfield Services Limited,Beijing 101149,China)
出处
《海洋石油》
CAS
2020年第2期57-60,95,共5页
Offshore Oil
关键词
阵列声波
流体模量
气层识别
array acoustic
fluid modulus
gas zone identification
