Efficient development strategies for large ultra-deep structural gas fields in China

• 作者: GUO Zhenhua HU Yong LI Lei LI Xizhe LIU Xiaohua LUO Ruilan SU Yunhe SUN Hedong WAN Yujin ZHANG Yongzhong
• 来源期刊: 石油勘探与开发:英文版
• 学科: 工学
• 关键词: ultra-deep formation LARGE STRUCTURAL gas field gas RESERVOIR characteristics RESERVOIR efficient development water invasion risk development strategies
• 年，卷（期）: 2018,（1）
• 页码范围: 118-126
• 页数: 9页
• 分类号: TE37

摘要

Through analyzing the development of large ultra-deep structural gas fields in China,strategies for the efficient development of such gas fields are proposed based on their geological characteristics and production performance.According to matrix properties,fracture development degree and configuration between matrix and fractures,the reservoirs are classified into three types:single porosity single permeability system,dual porosity dual permeability system,and dual porosity single permeability system.These three types of gas reservoirs show remarkable differences in different scales of permeability,the ratio of dynamic reserves to volumetric reserves and water invasion risk.It is pointed out that the key factors affecting development efficiency of these gas fields are determination of production scale and rapid identification of water invasion.Figuring out the characteristics of the gas fields and working out pertinent technical policies are the keys to achieve efficient development.The specific strategies include reinforcing early production appraisal before full scale production by deploying high precision development seismic survey,deploying development appraisal wells in batches and scale production test to get a clear understanding on the structure,reservoir type,distribution pattern of gas and water,and recoverable reserves,controlling production construction pace to ensure enough evaluation time and accurate evaluation results in the early stage,in line with the development program made according to the recoverable reserves,working out proper development strategies,optimizing pattern and proration of wells based on water invasion risk and gas supply capacity of matrix,and reinforcing research and development of key technologies.