大庆石油地质与开发2017，Vol.36Issue(2)：171-174,4.DOI:10.3969/J.ISSN.1000-3754.2017.02.029
致密油气藏裂缝介质压力敏感分析与计算方法
PRESSURE SENSITIVITY ANALYSIS AND CALCULATING METHOD FOR THE FRACTURE MEDIUM OF THE TIGHT OIL RESERVOIR
摘要
Abstract
The pressure sensitivity of the fracture medium in the tight oil and gas reservoir possesses a significant impact on the development effects of the petroleum reservoir.Based on the theory of material conservation,the pressure sensitivity equations of the matrix and fracture were established with the help of the theoretical deduction;as the same time,by means of the physical simulation experiment of the pressure sensitivity percolation for the individual fracture,the fracture deformation and medium permeability change characteristics were studied,and moreover the rationality of the flow model of the pressure-sensitive fracture medium was verified by the experimental results stated above.The researches show that the established pressure sensitivity equation for the matrix and fracture is the function of the liquid pressures,this understanding can solve the problem that the deformed coefficient in the conventional pressure sensitivity equation is difficult to determine,and thus the adaptability of the equation is enhanced in the actual development of the tight oil reservoir.The experiment found that the liquid pressures were dropped,the fractures among the swollen matrix blocks were closed,the fracture aperture was decreased and the medium permeability was increased;when the liquid pressure rising,the contracted blocks made the fractures among the blocks open,both the aperture and medium permeability were enlarged.The contrast between the results of the experimental simulation and permeability model based on the experimental data has verified the rationality of the permeability model.All the achievements have exposed the pressure-sensitive deforming mechanism of the fracture medium in the tight oil reservoir,thus the basement of the permeability characterization has been laid for the fracture medium.关键词
致密油气藏/裂缝变形/压力敏感方程/实验模拟Key words
tight oil and gas reservoir/fracture deformation/pressure sensitivity equation/experiment simulation分类
能源科技引用本文复制引用
孙璐,刘月田,冯月丽,于鹏,陈健,丁耀..致密油气藏裂缝介质压力敏感分析与计算方法[J].大庆石油地质与开发,2017,36(2):171-174,4.基金项目
国家自然科学基金项目“各向异性裂缝页岩气藏渗流机理与理论研究”(51374222) （51374222）
国家重点基础研究发展计划“陆相致密油高效开发基础研究”课题五之专题一“致密油藏产能预测方法”(2015CB250905). （2015CB250905）
