Title

Analysis of gas - water production re lat ionship for
Well X8

作者

刘斐1 陆正元1 黄河2 董大鹏1

Authors

Liu Fei ,Lu Zhengyuan,HuangHe, et al

单位

1 成都理工大学油气藏地质及开发工程国家重点实验室, 四川成都610059; 2 西南油气田分公司川中油气矿, 四川南部637300

Organization

( State Key Laboratory of O il and Gas
Reservoir Geo logy and Exploitation, Chengdu University
of Technology, Chengdu 610059, China),

摘要

四川盆地XN 气田香溪群气井开采过程中见水普遍, 气井见水后产能迅速降低或水淹停喷; 气藏水体活跃, 气井产气量低、产水量高, 气藏开发效率低、采出程度不高。在分析气藏开发地质特征基础上, 重点解剖了X8井开发过程中气水产出量的变化。与一般的有

水气井不同, X8井见水后, 初期每次开井先产水再气水同产, 后期每次开井则先产气再气水同产。通过对水体特征和驱动能量的研究认为气藏水体体积有限, 水体主要靠分隔气弹性驱动能量作用产出。分析了隔气式气藏的气驱机理, 很好地解释了X8井气水产出的复杂现象。

Abstract

W a ter- production is a norm a l phenom enon dur ing gas
production o f X iangx iqun gas w ell in XN gas fie ld of S ichuan
basin. Once a we ll encoun ters w ater, it stops to wo rk or its
production competence falls rap idly. And gas reservo ir is
characterized by low gas outpu t, h igh wa ter output, low
explo itation effic iency and low recovery. On the basis o f
analyzing gas reservo ir geolog ic property, w e ana lyze the
change of gas - wa ter output in who le process espec ia lly.
Be ing different from the norm a l gas w el,l X8 we ll products gas
in advance a fterw ater production at in itia l stage and produces
gas and w ater in eve ry reproduction tim e at last, in contrast, it
s’ early gas and later g as and w ater at late r stage. Through
study ing aquife r property and driv e ene rgy, it s’ proposed that
gas reservo ir aqu ifer is fin ite and the w ate r production is
m a inly by the function o f elastic expansion energy o f
compartm ent gas. At last, w e ana ly ze gas- drive princ ip les o f
compartm ent gas reservo ir. By using it, w e exp la in the
comp lex phenomenon of gas- w ater production aboutW ellX8
perfectly.

关键词：

气井裂缝系统生产特征有限水体隔气式气驱;

Keywords:

gas w el,l frac ture system, production
perform ance, fin ite aqu ifer, com pa rtm en t- gas drive;

基金项目

DOI

X8井气水产出关系分析