苏里格气田A区块储层基础物性特征分析
万慈昡¹，胡维首¹，沈雅斐¹，刘志凯¹，祝瑶²
（1. 长庆油田分公司第六采气厂，陕西 西安 710018；2. 西南石油大学石油与天然气工程学院，四川 成都 610500）
摘要：储层基础物性分析对了解气藏、制定气田开发方案及研究气井合理生产制度都至关重要。以苏里格气田
A 区块实物岩心为基础，依次开展基础孔渗、矿物成分、扫描电镜和高压压汞实验分析，分析储层的微观结构特
征。实验结果表明：1） 目标区域属于低孔低渗碳酸盐岩储层，非均质性强；2） 岩石以脆性矿物为主，黏土矿物
质量分数极小（大部分岩石中黏土矿物质量分数小于2.0%）；3） 孔隙以粒间孔为主，孔隙形态多样，纳米级微
裂缝少见，填充度不高，缝洞呈现几何式特征；4） 最大进汞饱和度差异大，孔喉结构不均匀，分选性差，孔喉
半径小且分布广。
关键词：基础物性；高压压汞；扫描电镜；矿物成分
中图分类号：P618.13      文献标志码：A      文章编号：2095-0802-(2024)02-0014-06
Basic Physical Properties of Reservoir in Block A of Sulige Gas Field
WAN Cixuan¹, HU Weishou¹, SHEN Yafei¹, LIU Zhikai¹, ZHU Yao²
(1. No.6 Gas Production Plant, Changqing Oilfield Company, Xi'an 710018, Shaanxi, China; 2. Petroleum Engineering
School, Southwest Petroleum University, Chengdu 610500, Sichuan, China)
Abstract: The analysis of the basic physical properties of reservoir is very important for the understanding of gas
reservoir, the formulation of gas field development plan and the study of reasonable production system of gas well. Based
on the physical core of block A of Sulige Gas Field, the microstructure characteristics of the reservoir were analyzed by
conducting experiments of basic porosity, mineral composition, scanning electron microscopy and high-pressure mercury
injection. The experimental results show that: 1) the target area is a low-porosity and low-permeability carbonate reservoir
with strong heterogeneity; 2) the rocks are dominated by brittle minerals, and the mass fraction of clay minerals is very
small (the mass fraction of clay minerals in most rocks is less than 2.0%); 3) the pores are mainly intergranular pores, the
pore morphology is diverse, the nanoscale micro-cracks are rare, the filling degree is not high, and the cracks and holes
show geometric characteristics; 4) the maximum mercury saturation difference is large, the pore throat structure is uneven,
the sorting is poor, the pore throat radius is small, and the distribution is wide.
Key words: basic physical properties; high-pressure mercury injection; scanning electron microscopy; mineral composition