致密砂岩气藏的压裂增产和压裂后储层保护技术  

Tight Gas Reservoir Fracturing Stimulation and Reservoir Protection Technology After Fracturing

作　　者：李晓琴[1] 

机构地区：[1]延长油田股份有限公司吴起采油厂,陕西延安717600

出　　处：《辽宁化工》2014年第10期1300-1304,1330,共6页Liaoning Chemical Industry

摘　　要：致密砂岩气是一种非常重要的非常规资源,它具有低孔（4%~12%）、低渗（﹤0.1×10-3 um2）、含气饱和度低、含水饱和度高、孔喉半径小等特征。由于致密砂岩气藏具有复杂的储层结构,多种孔隙、喉道、微裂缝发育,因此通过压裂技术实现低渗致密气藏增产是很重要的。致密砂岩气藏的压裂增产技术主要有分层压裂技术、大型压裂技术、水平井分段压裂技术、CO2泡沫压裂技术等,这些技术现在在国内外致密砂岩气藏增产中都取得了一定的成果。本文对这几种主要的压裂方法做了介绍。同时,由于压裂增产改造后,外来颗粒和滤液侵入会对储层造成一定的损害,因此压裂改造后的储层保护也非常重要,现在主要使用屏蔽暂堵技术来降低损害程度,保护储层,为今后的开发提供保障。Tight sandstone gas is a very important non-conventional resource, it has low porosity（4%~12%）,low permeability（﹤0.1×10-3um2）,low gas saturation, high water saturation, small pore throat radius, and other features. As the tight sandstone gas reservoirs have complex reservoir structure, and a variety of pore, throat, micro-fracture development, and the fracturing technology to achieve low permeability tight gas production is very significant. The fracturing stimulation techniques of tight sandstone gas include hierarchical fracturing technology, large-scale fracturing, horizontal well section fracturing, CO2 foam fracturing technology, and so on. These technologies have achieved certain results in increasing tight sandstone gas production at home or abroad. In this paper, major types of fracturing techniques were described. After the fracturing stimulation and transformation, the invasion of foreign particles and filtrate will cause some damages to the reservoir. So after the fracturing, the reservoir protection is also essential, and main technique to reduce the scale of damage is temporary blocking technology for protecting the reservoir.

关 键 词：致密砂岩气藏 低孔低渗 压裂增产 储层保护 

分 类 号：TE357[石油与天然气工程—油气田开发工程]