异常高压气井产能评价技术研究  

Research on Productivity Estimation Technology to Abnormal High Pressure Gas Well

作　　者：周静[1] 张城玮[2] 周伟[2] 陈万钢[3] 吴翔[3] 

机构地区：[1]西南油气分公司石油工程监督中心,四川德阳618000 [2]成都理工大学能源学院,四川成都610059 [3]中联煤层气有限责任公司,北京100011

出　　处：《油气井测试》2016年第3期35-37,41,共4页Well Testing

基　　金：国家科技重大专项"低渗油气田完井关键技术"(2011ZX05022-006)内容

摘　　要：异常高压气藏由于存在变渗透率问题,在气井产能计算时必须考虑应力敏感性。对Y气田渗透率和孔隙度进行了应力敏感性实验,研究结果表明渗透率比孔隙度具有更强的应力敏感性。采用常规的压力平方法和拟压力法计算了气井的产能后,根据储层的应力敏感性,改进了气井的拟压力法产能方程,定量讨论了应力敏感性大小对气井产能的影响。研究表明:应力敏感性对产能影响较大,在建立产能方程时,必须考虑渗透率应力敏感性。此外,如果在开发早期缺乏应力敏感数据,可近似用压力平方法来确定该区气井产能。Due to problem of the variable permeability to abnormal high pressure gas reservoir,stress sensitivity must be considered when calculating gas well productivity. The stress sensitivity experiment of porosity and permeability of Y field has been conducted,and its research results show that the permeability has the stronger stress sensitivity than the porosity. After the gas well production capacity is calculated by using conventional pressure square method and the pseudopressure method,according to the stress sensitivity of reservoir,the pseudo pressure method of gas well productivity equation is improved,influence of stress sensitivity size on gas well productivity is discussed quantitatively. Research shows that stress sensitivity influence much on capacity,and when establishing productivity equation,permeability stress sensitivity must be considered. In addition,if the lack of stress sensitive data in the early development,the approximate stress method can be used to determine the gas well production capacity in the area.

关 键 词：异常高压气藏 应力敏感性 产能 渗透率伤害率 

分 类 号：TE353[石油与天然气工程—油气田开发工程]