清水不加砂压裂增产机理及导流能力测试  

Study on yield increase mechanism and flow conductivity test method for water-fracturing without proppant

作　　者：李士斌[1] 张立刚[1] 高铭泽[2] 陈波涛[2] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]大庆油田有限责任公司井下作业分公司,黑龙江大庆163453

出　　处：《石油钻采工艺》2011年第6期66-69,共4页Oil Drilling & Production Technology

基　　金：黑龙江省自然科学基金"清水压裂增产机理及适应储层条件研究"(编号:E201015)资助

摘　　要：清水压裂技术在低渗透油气田增产增注中应用广泛,但并非所有低渗透地层都适合清水压裂,因而需要深入研究清水压裂增产机理及导流能力测试。利用有限元模拟方法,从岩石材料的非均质性、岩石力学性质、地应力偏差、裂缝起裂方向与最大水平地应力夹角等方面揭示了清水压裂裂缝转向和滑移机理、滑移量的影响因素和影响规律、裂缝闭合残余孔隙空间形成机理,并建立了清水压裂自支撑裂缝壁面组合制备方法和导流能力的室内评价方法,为深入认识清水压裂增产机理及适用储层条件提供了手段。At present,water-fracturing is a key stimulated technique in widespread use for low permeability oil-gas filed to gain extremely economic benefit,on the other hand,the process is not suitable for all low permeability reservoirs.Studies on yield increase mechanism and flow conductivity test method for water-fracturing should be deeply conducted.The mechanisms of fracture diverting and slip for water fracturing,influencing factors and influence law of slippage and the forming mechanism of residual space after crack closed are addressed with the finite element method from different aspects： heterogeneity of rock materials,rock mechanics property,deviation of in-situ stress,the angle between the direction of fracture starting and the maximal horizontal principle stress.The preparation method of self-supporting fracture wall surface combination and test method of flow conductivity for water-fracturing are established,which provide the reference means for deep understanding the production increasing mechanism and suitable reservoir conditions of water-fracturing.

关 键 词：清水压裂 数值模拟 剪切滑移 裂缝转向 残余空隙空间 导流能力 

分 类 号：TE357[石油与天然气工程—油气田开发工程]