碳酸盐岩气藏的渗流模型和产量递减分析方法-《油气井测试》

文章信息/Info

Title:: Percolation model and production decline analysis method for carbonate gas reservoirs

作者:: 康莉霞¹; 叶礼友²; 刘华勋²; 张振东³; 张蓉⁴; 1.中国石油勘探开发研究院非常规研究所北京 100089
2.中国石油勘探开发研究院渗流流体力学研究所河北廊坊 065007
3.辽宁红阳燃气开发有限公司辽宁沈阳 110000
4.中国石油新疆油田分公司勘探开发研究院技术服务中心新疆克拉玛依 834000

Author(s):: KANG Lixia1; YE Liyou2; LIU Huaxun2; ZHANG Zhendong3; ZHANG Rong4; 1.Unconventional Research Institute, RIPED, Beijing 100089, China
2.Research Institute of Percolation Fluids Mechanics, RIPED, Langfang, Heibei 065007, China
3.Liaoning Hongyang Gas Development Limited Company, Shenyang, Liaoning 110000, China
4.Technical Service Center of Exploration and Development Research Institute of PetroChina Xinjiang Oilfield Branch, Kelamay, Xinjiang 834000,

China

Keywords:: stress sensitivity; nonDarcy effect; dual media; seepage model; production decline

analysis; productivity evaluation; carbonates; seepage characteristics

摘要:: 为明确应力敏感性和高速非达西效应对双重介质气藏不稳定渗流的影响，建立了同时考虑二者影响的碳

酸盐岩气藏渗流模型；引入摄动原理，在拉氏空间下对模型进行求解，获得拉普拉斯空间解析解，利用Stehfest数值反演算法将拉普拉斯空间解转换为实空间的解，根

据求解结果绘制产量递减分析图版，结合产量递减分析图版进行了参数敏感性分析。结果表明，应力敏感性和非达西效应都会显著降低气藏产量。应力敏感系数越大，

应力敏感性越强，气藏产量递减越快；非达西系数越小，非达西效应越强，气藏初期产量递减越快。建立的渗流模型和产量递减分析方法提高了对碳酸盐岩气藏渗流规

律的认识，为分析该类气藏的产量规律提供了理论支持。

Abstract:: In order to clarify the effect of stress sensitivity and nonDarcy effect on

unstable seepage in dualmedia gas reservoirs, a seepage model of carbonate gas reservoirs considering both effects was established. The

perturbation principle was introduced to solve the model in Laplace space, and the analytical solution in Laplace space was obtained. The solution

in Laplace is transformed into real space solution by using Stehfest numerical inversion algorithm. Based on the solution result, the production

decline analysis chart was drawn, and the sensitivity of parameters was analyzed using the production decline analysis chart. The results show

that both stress sensitivity and nonDarcy effect can significantly reduce gas reservoir production. The larger the stress sensitivity

coefficient is, the stronger the stress sensitivity is, and the faster the decline of gas reservoir production is. The smaller the nonDarcy

coefficient is, the stronger the nonDarcy effect is, and the faster the decline of gas reservoir initial production is. The established seepage

model and production decline analysis method can improve the understanding of the percolation law of carbonate gas reservoirs, which provides a

theoretical support for the analysis of the production law of such gas reservoirs.