岩性油气藏 ›› 2025, Vol. 37 ›› Issue (5): 178–185.doi: 10.12108/yxyqc.20250516

• 石油工程与油气田开发 • 上一篇    

异常高压有水气藏物质平衡方程式的推导及应用

蔡珺君, 刘微, 胡怡, 李秋, 徐睿, 毛正林, 田野, 马旸   

  1. 中国石油西南油气田公司 勘探开发研究院, 成都 610041
  • 收稿日期:2024-08-05 修回日期:2024-11-29 发布日期:2025-09-06
  • 第一作者:蔡珺君（1987—），男，博士，工程师，主要从事天然气开发与气藏描述方面的研究工作。地址:（610041）四川省成都市天府大道北段12号。Email:swadings@petrochina.com.cn。
  • 基金资助:
    中国石油西南油气田公司科研项目“川中古隆起碳酸盐岩气藏效益开发技术研究”（编号：2024D103-04）资助。

Derivation and application of material balance equation for abnormal high pressure gas reservoirs with aquifer

CAI Junjun, LIU Wei, HU Yi, LI Qiu, XU Rui, MAO Zhenglin, TIAN Ye, MA Yang   

  1. Exploration and Development Research Institute, PetroChina Southwest Oil & Gas Field Company, Chengdu 610041, China
  • Received:2024-08-05 Revised:2024-11-29 Published:2025-09-06

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摘要： 异常高压有水气藏受岩石、流体压缩和水侵的综合作用，压降曲线形态为上移的“直线型”。利用Fetkovich定义的累积有效压缩系数概念和动态储量采出程度Gp/G与Ce(p)Δp+ω的幂指函数关系，推导了幂指函数形式的异常高压有水气藏物质平衡方程。研究结果表明：①根据气藏生产资料，可采用新推导的异常高压有水气藏物质平衡方程式计算气藏动态储量和水侵量。②由国内11个异常高压有水气藏生产数据拟合得到的Gp/G与-overline>Ce(p)Δp+ω幂指函数拟合系数A值为0.3～0.9，B值为1.0～2.0。A值和B值的大小均反映了气藏水侵发生的早晚，若气藏为早期水侵，则A值越大；若气藏为中后期水侵，则B值越大。③国内6个异常高压有水气藏的生产数据计算和对比结果显示，该物质平衡方程是可靠的。

关键词: 异常高压有水气藏, 累积有效压缩系数, 幂指函数, 水侵量, 动态储量, 动态描述

Abstract: Abnormal high pressure gas reservoirs with aquifer are subjected to the combined action of rock，fluid compressibility and water invasion. As a result，the shape of pressure drop curve is an upward moving“ straight line”. Using the concept of the cumulative effective compaction coefficient defined by Fetkovich，and the powerlaw function of dynamic reserves recovery rate Gp/G and Ce(p)Δp+ω derived from field data，a material balance equation for abnormal high pressure gas reservoirs with aquifer was derived in the form of a power-law function.The results show that：（1）Based on the production data of gas reservoir，the newly derived material balance equation of the abnormal high pressure gas reservoir with aquifer can be used to calculate the dynamic reserves and water influx of the gas reservoirs.（2）The fitting coefficients A and B of the power function Gp/G and Ce(p)Δp+ω derived from production data of 11 abnormal high pressure gas reservoirs with aquifer in China， with A value of 0.3-0.9 and B value of 1.0-2.0.The values of A and B reflect the timing of water invasion in gas reservoirs：if the gas reservoir experiences early water invasion，the A value is larger；if the gas reservoir experiences middle and late water invasion，the B value is larger.（3）The production data calculation and comparison of 6 abnormal high pressure gas reservoirs with aquifer in China show that the newly established material balance equation is reliable.

Key words: abnormal high pressure gas reservoirs with aquifer, cucumulative effective compaction coefficient, power-law function, water influx, dynamic reserves, dynamic description

中图分类号: 

  • TE341
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