摘要
我国致密低渗透储层的油气资源量巨大,但储层基质物性差,非均质性强,天然裂缝发育,勘探与开发难度大。天然裂缝是致密低渗透储层的有效储集空间和主要渗流通道,控制了这类油气藏的成藏、单井产能及开发效果,天然裂缝分布规律研究对致密低渗透油气藏的勘探和开发至关重要。在阅读国内外大量文献的基础上,系统地综述了致密低渗透储层裂缝研究中涉及的储层裂缝成因类型、控制因素、储层裂缝参数表征方法、裂缝有效性影响因素与评价方法、天然裂缝与人工裂缝的耦合关系等研究现状,探讨了现阶段储层裂缝研究中存在的问题及进一步需要开展的工作。非常规储层裂缝的形成机理与主控因素、多学科相结合的高精度裂缝井间预测及裂缝三维地质建模、裂缝的分级评价及有效性评价将是近期裂缝研究的重点。
Low permeability tight reservoirs contain huge oil gas resources in China, however, they are dif- ficult to explore and develop because of their poor matrix property, strong heterogeneity and natural frac- tures. Fractures are the effective storage space and major flow channels, thus controlling hydrocarbon ac- cumulation, single well productivity and development effect of these reservoirs. Hence, research on frac- ture distribution rules plays a significant role in exploration and exploitation of low permeability tight res- ervoirs. Based on a large number of domestic and international literatures, this paper systematically re- views fracture researches from the following aspects： 1） fracture genetic types; 2） fracture controlling fac- tors; 3） characterization methods of fracture parameters; 4） influencing factors of fracture effectiveness and its evaluation methods; 5） the coupling relationship between natural and hydraulic fractures. Then, the paper discusses the. existing problems of present fracture research and some further work. The discus- sion of the recent fracture researches is focused on the formation mechanism and main controlling factors of fractures in unconventional reservoirs, high precise interwell fracture prediction in combination with multi- ple disciplines, 3D fracture modeling, fracture classification evaluation and effectiveness evaluation.
出处
《地质科技情报》
CAS
CSCD
北大核心
2016年第4期74-83,共10页
Geological Science and Technology Information
基金
国家自然科学基金项目(41272164)
关键词
天然裂缝
控制因素
裂缝参数
裂缝预测
有效性
人工裂缝
natural fracture
controlling factor
fracture parameter
fracture prediction
fracture effective- ness
hydraulic fracture
