裂缝性储层阵列侧向测井响应反演研究  

On Inversion of Array Laterolog Responses in Fractured Reservoir

作　　者：李智强[1] 邓少贵[1,2] 范宜仁[1,2] 李虎[1] 

机构地区：[1]中国石油大学地球资源与信息学院,山东青岛266555 [2]中国石油大学CNPC测井重点实验室,山东青岛266555

出　　处：《测井技术》2010年第2期138-142,共5页Well Logging Technology

基　　金：国家科技重大专项资助(2008ZX05035-02);山东省自然科学基金(Y2007F25)

摘　　要：建立了裂缝性储层阵列侧向测井响应的三维有限元正演模型。利用三维有限元方法计算不同角度、不同裂缝孔隙度裂缝的阵列侧向测井响应,得出裂缝性储层的阵列侧向测井响应与裂缝孔隙度、裂缝倾角的关系。随裂缝孔隙度增加,阵列侧向视电阻率降低。低角度裂缝的阵列侧向深浅视电阻率呈现负差异,高角度缝呈现正差异。将阵列侧向测井反演问题转化为无约束的非线性全局优化问题,利用差分进化算法对阵列侧向测井进行反演,为阵列侧向测井资料反演裂缝性地层参数提供了理论基础。Three-dimensional finite element forward model for array laterolog responses of frac- tures in fractured reservoir is built and used to simulate the responses of the high-definition array laterolog in fractured formation for different fracture parameters （fracture dip and porosity）. And the relationship between the array laterolog responses in the fractured formation and fracture po- rosity or fracture dip is obtained. The apparent resistivity of array laterolog reduces when the fracture porosity increases. The deep and shallow apparent resistivity measured by array laterolog for low-angle fracture presents negative variance, while for high-angle fracture, it presents posi- tive variance. The inversion of array laterolog responses is transformed into an unconstrained nonlinear global optimization problem and calculated by difference evolution algorithm. The re- search above provides theoretical basis for the inversion of formation parameters of array laterolog data.

关 键 词：阵列侧向测井 差分进化 裂缝性储层 反演 裂缝孔隙度 

分 类 号：P631.811[天文地球—地质矿产勘探]