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
刘宇 1王亮 1罗洋 1苏树特 1姚蔺芳 1刘瑜超 1周纯润 1胡梦蝶1
作者信息
- 1. 成都理工大学 能源学院,四川 成都 610059
- 折叠
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(φf)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;φf—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.
Abstract
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(RP)cross-plotting method.The results are as follows:(1)The Maokou Formation carbonate reservoirs in the central Sichuan Basin can be-classified 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)The φf-RP 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Key words
Maokou Formation/carbonate reservoir/reservoir type classification/log-based identification引用本文复制引用
基金项目
国家自然科学基金(U2003102)
国家科技重大专项(2016ZX05052)
出版年
2024
国家科技期刊平台
NSTL
万方数据