Optimization of Gas-Flooding Fracturing Development in Ultra-Low Permeability Reservoirs
作者机构：Tight Oil Research InstitutePetroChina Research Institute of Petroleum Exploration&DevelopmentBeijing100083China Key Laboratory of Unconventional Oil&Gas DevelopmentChina University of Petroleum(East China)Qingdao266580China Oil&Gas Technology Research InstituteChangqing Oilfield CompanyXi’an710018China
出 版 物：《Fluid Dynamics & Materials Processing》 (流体力学与材料加工（英文）)
年 卷 期：2024年第20卷第3期
页 面：595-607页
核心收录：
学科分类：02[经济学] 0202[经济学-应用经济学]
主 题：Ultra-low permeability reservoir gas injection flooding component simulation fracture parameters intelligent optimization differential evolution
摘 要：Ultra-low permeability reservoirs are characterized by small pore throats and poor physical properties, which areat the root of well-known problems related to injection and production. In this study, a gas injection floodingapproach is analyzed in the framework of numerical simulations. In particular, the sequence and timing of fracturechanneling and the related impact on production are considered for horizontal wells with different fracturemorphologies. Useful data and information are provided about the regulation of gas channeling and possible strategiesto delay gas channeling and optimize the gas injection volume and fracture parameters. It is shown that inorder to mitigate gas channeling and ensure high production, fracture length on the sides can be controlled andlonger fractures can be created in the middle by which full gas flooding is obtained at the fracture location in themiddle of the horizontal well. A Differential Evolution (DE) algorithm is provided by which the gas injectionvolume and the fracture parameters of gas injection flooding can be optimized. It is shown that an improvedoil recovery factor as high as 6% can be obtained.
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