特低渗气藏水的赋存状态及其对A气田开发的影响

doi:10.7657/XJPG20250111

摘要/Abstract

摘要：

特低渗气藏气水关系复杂，地层水赋存状态与常规气藏差异大。通过压汞实验和相渗实验确定特低渗气藏水的赋存状态及地层水饱和度，采用圈闭闭合高度法分析气水分异情况。在测井曲线预测单井不同状态地层水饱和度分布的基础上，分析地层水对产能的影响。结果表明：研究区地层水以强束缚水和弱束缚水为主，含有少量可动水，不存在明显的气水分异特征。黏土水膜是强束缚水的重要组成部分，在细砂岩和碳酸盐胶结物含量高的砂岩中，弱束缚水饱和度更高。研究区可动水饱和度普遍低于6%，初期产水较少，对产能影响较小。

关键词: 特低渗气藏, 地层水, 赋存状态, 气田开发, 产能, 含水饱和度

Abstract:

Ultra-low permeability gas reservoirs are complex in gas-water contact, and differ significantly in formation water occurrence state from conventional gas reservoirs. The occurrence state of formation water and the water saturation in such reservoirs were determined through mercury intrusion experiments and relative permeability tests, and the gas-water segregation was analyzed using the trap closure height method. Logging curves were used to predict the distribution of formation water saturation in different states for a single well, and the impact of formation water on productivity was assessed. The results show that the formation water in the study area mainly consists of strongly bound water and weakly bound water, with a small amount of movable water. No distinct gas-water segregation was observed. The clay water film is a key component of strongly bound water. In fine sandstone and the sandstone with high content of carbonate cements, the saturation of weakly bound water is higher. The movable water saturation in the study area is generally less than 6%, and the initial water production is low, exerting slight impact on productivity.

Key words: ultra-low permeability gas reservoir, formation water, occurrence state, gas field development, productivity, water saturation

中图分类号:

TE112.22

廖恒杰, 娄敏, 何贤科, 段冬平, 汪文基, 李元生, 刘彬彬. 特低渗气藏水的赋存状态及其对A气田开发的影响[J]. 新疆石油地质, 2025, 46(1): 88-96.

LIAO Hengjie, LOU Min, HE Xianke, DUAN Dongping, WANG Wenji, LI Yuansheng, LIU Binbin. Occurrence State of Water in Ultra-Low Permeability Gas Reservoirs and Its Impact on Development of A Gas Field[J]. Xinjiang Petroleum Geology, 2025, 46(1): 88-96.

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