岩性油气藏 ›› 2025, Vol. 37 ›› Issue (5): 186–192.doi: 10.12108/yxyqc.20250517

• 石油工程与油气田开发 • 上一篇    

鄂尔多斯盆地大牛地气田气水同产定容气藏动态储量计算新方法

赵润冬, 王锦昌, 罗懿, 周瑞立, 周舰   

  1. 中国石化华北油气分公司 石油工程技术研究院, 郑州 450006
  • 收稿日期:2024-08-14 修回日期:2024-10-01 发布日期:2025-09-06
  • 第一作者:赵润冬（1985—），男，硕士，副研究员，主要从事气藏工程、采气工艺方面的研究工作。地址:（450006）河南省郑州市陇海西路199号华北石油局。Email:zhaofjd@163.com。
  • 基金资助:
    中国石油化工股份有限公司项目“致密含水气藏采输关键技术及应用”（编号：P23162）资助。

A new calculation method for dynamic reserves of gas water coproduction volumetric gas reservoirs in Daniudi Gasfield of Ordos Basin

ZHAO Rundong, WANG Jinchang, LUO Yi, ZHOU Ruili, ZHOU Jian   

  1. Research Institute of Petroleum Engineering Technology, Sinopec North China Oil & Gas Company, Zhengzhou 450006, China
  • Received:2024-08-14 Revised:2024-10-01 Published:2025-09-06

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摘要： 针对气水同产定容气藏在应用流动物质平衡方程时，随着水气比增加而计算的动态储量逐渐偏大，影响气井生产潜力评价的问题，综合考虑储层含水饱和度、累计产水量、岩石骨架膨胀的影响，建立了一种定容气藏气水两相物质平衡方程。研究结果表明：①建立的方程为隐函数方程，相应的设计为以动态储量、拟压力采气指数双参数约束的迭代求解方法。②经3口气井压恢试井成果验证，在同样使用井口和井底生产数据条件下，气水两相物质平衡方程计算动态储量的平均绝对误差为5%，流动物质平衡方程计算动态储量的平均绝对误差为111%，由此可见，气水两相物质平衡方程准确性更高。③动态储量随着水气比增大而降低，且水气比越高，分别采用气水两相物质平衡方程、流动物质平衡方程计算的动态储量差异越大。

关键词: 气水同产定容气藏, 致密气藏, 动态储量, 拟压力采气指数, 气水两相物质平衡方程, 流动物质平衡方程, 大牛地气田, 鄂尔多斯盆地

Abstract: When flowing material balance equation is applied in gas water coproduction volumetric gas reservoirs，as the water-gas ratio increases，the calculated dynamic reserves error gradually tends to increase，and the result affects the evaluation of gas well production potential. To address this problem，a gas-water two-phase material balance equation for volumetric gas reservoir was established by integrating the effects of water saturation， cumulative water production and rock matrix expansion.The results show that：（1）As the equation is an implicit function equation，a corresponding iterative solution method is designed to be constrained by dual parameters of dynamic reserves and pseudo-pressure gas recovery index.（2）Verified by the pressure recovery test results of 3 gas wells，under the same conditions of using wellhead and wellbore production data，the average absolute error of calculating dynamic reserves using the gas-water two-phase material balance equation is 5.0%，and the average absolute error of calculating dynamic reserves using the flowing material balance equation is 111%. By comparison，the accuracy of gas-water two-phase material balance equation is higher.（3）Dynamic reserves decrease as the water-gas ratio increases. And as the water-gas ratio increases，the difference of dynamic reserves calculated by the gas-water two-phase material balance equation and the flowing material balance equation becomes greater.

Key words: gas water coproduction volumetric gas reservoirs, tight gas reservoirs, dynamic reserves, pseudopressure gas recovery index, gas-water two-phase material balance equation, flowing material balance equation, Daniudi Gasfield, Ordos Basin

中图分类号: 

  • TE342
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