Pore structure and fractal characteristics of tight sandstone in meandering stream facies: a case study of the J2s2 member in the central Sichuan Basin, China

Frontiers in Earth Science

Earth Science

Xun Zhu¹  Guian Guo¹  Changcheng Yang¹  Zhanlei Wang²  Linjie Feng²  Guangyin Cai²  Yuqiang Jiang²  Qinggao Zeng³ 

[1] PetroChina Southwest Oil and Gas Field Company, Chengdu, China;School of Geoscience and Technology, Southwest Petroleum University, Chengdu, China;Unconventional Reservoir Evaluation Laboratory, PetroChina Key Laboratory of Unconventional Oil and Gas, Chengdu, China;Tight Oil and Gas Exploration and Development Project Department of PetroChina Southwest Oil and Gas Field Company, Chengdu, China;

关键词: fractal dimension;    tight sandstone;    pore structure;    meandering stream facies;    shaximiao formation;    sichuan basin;   

DOI  :  10.3389/feart.2023.1183734

 received in 2023-03-10, accepted in 2023-04-20,  发布年份 2023

来源: Frontiers

【 摘 要 】

Based on porosity and permeability tests, high-pressure mercury injection (HPMI), nuclear magnetic resonance (NMR) and centrifugal experiments, this study comprehensively analyzed the quality, pore structure and fractal characteristics of tight sandstone reservoir in meandering stream facies. The purpose is to reveal the relationship between physical properties, geometry and topological parameters of pores, fluid mobility and heterogeneity of pore system of tight sandstone reservoirs in meandering stream facies. The results show that the second member of the Middle Jurassic Shaximiao Formation (J2S2) in the central Sichuan Basin has developed tight sandstone reservoir of meandering fluvial facies, the pore radius of type I reservoir (K>0.3 mD) is mainly distributed at 0.01 μm∼2 μm, the tortuosity ranges between 2.571 and 2.869, and the average movable fluid saturation is 70.12%. The pore radius of type II reservoir (0.08mD

【 授权许可】

Unknown   
Copyright © 2023 Feng, Jiang, Guo, Yang, Zhu, Zeng, Cai and Wang.