基于孔隙结构分形维数的水驱气藏见水井产能预测模型  

Productivity Prediction Model for Water-Breakthrough Gas Wells in Water-flooding Gas Reservoirs Based on Fractal Dimension of Pore Structure

作　　者：孙双双 何勇明[1] 邓美洲[2] 牛娜 蒋燕聪 冯英[2] SUN Shuangshuang;HE Yongming;DENG Meizhou;NIU Na;JIANG Yancong;FENG Ying(School of Energy,Chengdu University of Technology,Chengdu,Sichuan 610059,China;Sinopec Southwest Oil and Gas Company,Chengdu,Sichuan 610041,China)

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]中国石油化工股份有限公司西南油气分公司,四川成都610041

出　　处：《西安石油大学学报（自然科学版）》2024年第4期62-67,107,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金资助项目“川南龙马溪组页岩干酪根中气水赋存特征与孔隙变形机理”(52204031)。

摘　　要：基于渗流理论和分形介质理论,利用分形维数与相渗曲线之间的幂函数关系,建立了气水两相流动条件下考虑孔隙结构分形维数与有效非达西系数的产能预测模型。研究表明:水驱气藏产水气井产能随着渗透率和有效厚度的增大而增大,但增大幅度随着参数值的增大逐渐变缓;随着分形维数、生产水气比、表皮系数、供给半径的增大,产水气井产能明显降低。在本文参数取值范围下,渗透率和有效厚度对产水气井产能影响最显著,是产能主控因素。模型可以准确预测水驱气藏产水气井产能,从而为调整气井生产制度、延缓气藏水侵、提高气藏开发效果提供理论指导与技术支持。Based on the percolation theory and fractal medium theory,a productivity prediction model for water-breakthrough gas wells in water-flooding gas reservoirs was established by utilizing the power function relationship between fractal dimension and phase permeability curve,taking into account the fractal dimension of pore structure and effective non-Darcy coefficient.Research shows that the productivity of the water-breakthrough gas wells increases with the increase of reservoir permeability and effective thickness,but the increase amplitude gradually slows down with the increase of permeability and effective thickness;With the increase of fractal dimension of reservoir pores,water-to-gas ratio,skin coefficient,and production fluid supply radius,the productivity significantly decreases.In the range of parameter values in this article,the reservoir permeability and effective thickness have the most significant impact on the productivity of the water-breakthrough gas wells,and are the main controlling factors for the production capacity.This model can accurately predict the productivity of the water-breakthrough gas wells in water-flooding gas reservoirs,thereby providing theoretical guidance and technical support for adjusting the production system of the gas wells,delaying water invasion of gas reservoirs,and improving the development effect of the gas reservoirs.

关 键 词：产能模型 水驱气藏 分形维数 影响因素 产能试井 

分 类 号：TE341[石油与天然气工程—油气田开发工程]