电成像测井储层非均质性评价方法在川东北G地区FC段地层的应用  

The application of the reservoir heterogeneity evaluate method with microresistivity image log in FC formation of G region in northeastern Sichuan

作　　者：李昌[1,2] 司马立强[1] 沈安江 寿建峰 周进高 

机构地区：[1]西南石油大学地球与科学技术学院,成都610500 [2]中国石油杭州地质研究院,杭州310023

出　　处：《地球物理学进展》2015年第2期725-732,共8页Progress in Geophysics

基　　金：中国石油重大科技攻关项目"海相碳酸盐岩气藏开发精细地质定量描述技术研究与应用"专题(2008E-0707)资助

摘　　要：岩心、成像测井资料表明川东北G地区FC段碳酸盐岩储层溶孔、裂缝发育,非均质性较强.根据溶孔、裂缝的发育程度与分布特征,可划分为6种典型储层类型.因此,有效评价储层非均质、划分储层类型是该区油气勘探与开发工作的关键.电成像测井资料能通过定性识别孔洞与裂缝对储层非均质性进行定性评价,但是由于缺乏能综合表征溶孔、裂缝等特征的定量参数,使得电成像测井资料对储层非均质性的定量表征存在问题.为此,基于分形理论,提出一种电成像测井定量评价方法,即计算电成像测井图像的分形维数来定量描述储层非均质性.储层类型与分形维数相关分析表明,分析维数可综合表征储层溶孔、裂缝,评价储层非均质性.应用实例表明,基于电成像测井分形维数的非均质性表征与储层类型划分应用效果较好,推动了该区的油气勘探与开发工作.Core data and borehole image data show the strong heterogeneity because of the development of fractures, pores and vugs in FC formation of G region in northeastern Sichuan. Base on the development degree and the distribution of the fractures, pores and vugs, six typical reservoirs are divided. So the evaluation of reservoir heterogeneity and the identification of reservoir type are the key job for the oil and gas exploration and development. It always has problems for the reservoir heterogeneity evaluation with formation micro-resistivity image log, due to lack of the comprehensive parameters to characterize the fractures, rugs and pores in the reservoir. Therefore, with the help of the fractal theory, a method is proposed to evaluate the carbonate reservoir heterogeneity using the fractal dimension calculated from the formation micro- resistivity image log. The relation of the reservoir type and fractal dimension show the fractal dimension can effectively characterize the comprehensive heterogeneity of the fractures, vugs and pores in reservoir. The application shows the good effects, that promotes the oil and gas exploration and development job of the field.

关 键 词：碳酸盐岩储层 非均质性 分形维数 电成像测井 

分 类 号：P631[天文地球—地质矿产勘探]