川东北飞仙关组储层孔隙度计算方法探讨

川东北飞仙关组储层岩性、储集空间复杂，非均质性强，具有典型的缝洞性储层特征。常规测井响应受其影响较大，直接用三孔隙度测井曲线计算孔隙度难以满足要求。因此，本文结合川东北飞仙关组储层的具体地质特征，在详细讨论缝洞对三孔隙度曲线影响的基础上，提出了在用 Pe (U)法或三孔隙度曲线交会法准确识别岩性基础上建立计算模型求取孔隙度的思路。经实际资料验证，孔隙度计算精度有较大的提高。

The Probe in Porosity Calculation Method of Fractured and Caved Reservoirs in Feixianguan Formation,Northeastern Sichuan Basin

The reservoirs of Feixianguan formation in Northeastern Sichuan Basin are typical fractured and caved ones which are characterized by complicated lithology, complicated reservoir space and strong heterogeneity. Porosity calculation directly with three porosity log curves is pretty difficult to meet the need because the characteristics have great impact on conventional log response. Hence, the concept of porosity calculation method is put forward by establishing computation model under the exactly identifying lithology with the method of Pe （U） and three porosity curve intersection with combining specific geologic characeristic of Feixianguan formation in Northeastern Sichuan Basin and discussion of the influence of three porosity curves by fracture and cave is done. The calculation accuracy of porosity has been improved greatly by verifying with field data.