地址:四川省成都市高新区天府大道北段12号中国石油科技大厦

电话:028-86015441;028-86015319

邮箱:gaskk@petrochina.com.cn

QQ群:489323588

您所在位置:首页->预发布刊期->2020年第1期


试论在地层条件下开展缝洞性碳酸盐岩储层应力实验研究的必要性--以川中DF气藏储层为例(40周年纪念)
Discussion on the necessity of carrying out experimental research on stress of fractured-vugg carbonate reservoir under stratum conditions --A case study of the reservoir of the DF gas reservoir in the central Sichuan
鄢友军,刘义成,徐伟,邓惠,罗文军
点击:208次 下载:3次
DOI:
作者单位:1.中国石油天然气股份有限公司西南油气田分公司勘探开发研究院; 2.国家能源高含硫气藏开采研发中心
中文关键字:缝洞,碳酸盐岩,地层条件,应力敏感实验,必要性
英文关键字:Fracture-vugg carbonate; Rock formation condition; Stress sensitivity experiment; Production capacity; Necessity.
中文摘要:四川盆地碳酸盐岩储层大多埋藏较深,溶洞和裂缝发育。裂缝开度低且溶蚀孔洞之间多为细小喉道沟通。在衰竭式开采过程中,伴随着储层流体压力减小,净应力增大,岩石孔洞缝连通空间受上覆压力影响逐渐被压缩,流体流动能力降低。裂缝作为主要的渗流通道,其闭合将更大地影响流体的渗流能力。该类气藏储层地层压力和温度较高,进行储层流体渗流机理室内实验较为困难,为此国内有些学者尝试用非地层温度和压力条件下的渗流实验实验结果进行相拟性推导得到地层条件下的实验结果,并以此来提出指导实际生产的建议。然而除了受净应力影响以外,地层中流体所处的压力、温度、密度、粘度等都会对渗流产生不同程度的影响,因此必须开展地层条件下的实验才能真实反映气相的渗流情况。通过开展川中DF碳酸盐岩缝洞型气藏地层条件下应力敏感实验,并对比分析不同应力敏感系数下产能变化的情况发现,采用真实地层条件下得到的应力敏感系数与常规实验的结果差异明显,如果按常规应力敏感实验的结果指导生产,可能会误导生产措施的制定带来不可挽回的后果,因此有必要开展缝洞性碳酸盐岩储层应力敏感实验研究才能为渗流特征和生产动态研究提供更为准确的参考依据。
英文摘要:Most of the carbonate reservoirs in Sichuan Basin are deep buried, with well-developed karst caves and fractures. Low fracture openings and fine throat communication between dissolution caves. In the process of depletion mining, with the decrease of reservoir fluid pressure and the increase of net stress, the connecting space of rock voids and fractures is gradually compressed under the influence of overburden pressure, and the fluid flow ability is reduced. As the main seepage channel, the closure of fracture will greatly affect the seepage ability of fluid. Because of the high formation pressure and temperature of this kind of gas reservoir, it is difficult to carry out the laboratory experiment of reservoir fluid percolation mechanism. For this reason, some scholars try to deduce the experimental results under formation conditions by using the experimental results of percolation under non-formation temperature ,and pressure conditionsand put forward suggestions to guide actual production. However, in addition to the net stress, the pressure, temperature, density and viscosity of the fluid in the formation will affect the seepage to varying degrees. Therefore, it is necessary to carry out experiments under the formation conditions to truly reflect the gas seepage situation. Based on the stress sensitivity experiments in DF carbonate fractured-cavern gas reservoirs in central Sichuan, and by comparing and analyzing the productivity changes under different stress sensitivity coefficients, it is found that the stress sensitivity coefficients obtained under real formation conditions are significantly different from the results of conventional experiments, if the results of conventional stress sensitivity experiments are used as guidance. Production may mislead the formulation of production measures and bring irreversible consequences. Therefore, it is necessary to carry out stress sensitive experimental study of fractured-cavernous carbonate reservoirs in order to provide more accurate reference for the study of seepage characteristics and production performance.
读者评论

      读者ID: 密码:   
我要评论:
国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
主管单位:中国石油西南油气田公司  主办单位:中国石油西南油气田公司勘探开发研究院
版权所有©2020天然气勘探与开发》编辑部 蜀ICP备10004100号
本系统由北京菲斯特诺科技有限公司设计开发
您是本站第2720895名访问者