川中地区茅口组碳酸盐岩储层类型测井识别  

Log-based identification of the types of the Maokou Formation carbonate reservoirs in the central Sichuan Basin

作　　者：刘宇 王亮 罗洋[1] 苏树特 姚蔺芳 刘瑜超 周纯润 胡梦蝶 LIU Yu;WANG Liang;LUO Yang;SU Shu-Te;YAO Lin-Fang;LIU Yu-Chao;ZHOU Chun-Run;HU Meng-Die(College of Energy,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学能源学院,四川成都610059

出　　处：《物探与化探》2024年第3期629-639,共11页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目“热液作用下的深部含铀油蚀变砂岩地球物理响应及铀油监探方法”(U2003102);国家科技重大专项“四川盆地大型碳酸盐岩气田开发示范工程”(2016ZX05052)。

摘　　要：川中地区茅口组碳酸盐岩储层溶蚀孔、洞、缝发育,非均质性强,储层类型多样。为明确川中茅口组碳酸盐岩储层类型,建立不同储层类型测井识别标准,首先通过铸体薄片、岩心照片、微电阻率成像测井资料分析,划分储层类型,并明确不同储层类型的常规测井响应特征;采用裂缝孔隙度(φ_f)和次生孔隙发育指数(RP)交会法,进行储层类型测井识别。结果表明:川中地区茅口组储层类型可划分为4类:缝洞型储层、裂缝—孔隙型储层、孔洞型储层和基质孔隙型储层;裂缝越发育,不同模型计算的裂缝孔隙度越接近,溶蚀孔、洞会在一定程度上影响裂缝孔隙度计算结果;φ_f—RP交会法对储层类型识别效果较好。研究成果为碳酸盐岩储层类型测井识别提供了技术支撑。The Maokou Formationcarbonate reservoirs in the central Sichuan Basinexhibit well-developed dissolutionpores,vugs,and fractures,pronounced heterogeneity,and diverse types.This study aims to identify their types and establish the log-based identification criteria for various reservoir types.First,this study classified the reservoir types based on the analysis of casting thin sections,core photos,and micro-resistivity imaging logs.Moreover,it determined the conventional log response characteristics of different reservoir types.Finally,it conducted log-based identification of reservoir types using the fracture porosity(φf)-secondary porosity index(R P)cross-plotting method.The results are as follows:(1)The Maokou Formation carbonate reservoirs in the central Sichuan Basin can beclassified into four types,i.e.,fractured-vuggy,fractured-porous,porous-vuggy,and matrix porous reservoirs;(2)Fracture porosities calculated from different models are more similar in the case of more developed fractures,and dissolution pores and vugscan affect the fracture porositycalculation results to some extent;(3)Theφf-R P cross-plotting method can effectively identify reservoir types.These research results provide technical support for the log-based identification of carbonate reservoir types.

关 键 词：茅口组 酸盐岩储层 储层类型划分 测井识别 

分 类 号：TE122[石油与天然气工程—油气勘探]