摘要
清水压裂技术在低渗透油气田勘探开发领域应用广泛,经济效益显著,但由于受到储层地应力、渗透率、岩石的粗糙度、强度等限制,并非所有低渗透地层都适合。目前,对于适合清水压裂储层的筛选,国内外都是通过对实际压裂施工数据进行统计而得到,这种方法缺乏理论支撑和实验室检验,不具有普遍的指导意义。因此,文中利用McGuire-Sikora增产倍数图版,分析了裂缝导流能力和缝长对增产效果的影响规律及清水压裂适应的储层条件;并利用岩石力学参数、地层渗透率、裂缝壁面抗压强度、闭合压力等参数,建立了预测清水压裂自支撑裂缝导流能力的计算方法;同时利用室内岩心实验,模拟裂缝剪切滑移,建立了清水压裂裂缝导流能力室内测试方法,为筛选适合清水压裂的储层提供了一种可行手段。
Riverfrac treatment is widely applied in exploration and development of low permeability oil-gas filed, and great economic benefit has been gained. But owing to the restriction of reservoir stress, permeability, roughness and intensity of rock, all the low permeability reservoirs are not suitable for riverffac treatment. Now, the reservoirs, being fit for riverfrac treatment, are selected by actual fracturing operation data, which is lack of support from the theory and lab tests and bas not universal guide. Through the use of McGuire-Sikora chart, this paper analyzes the effect rule of fracture conductivity and fracture length on stimulation effect and the reservoir condition for riverfrac treatment. Considering the rock mechanics parameters, formation permeability, compression strength and elosure stress, a mathematical model of forecasting the residual fracture width is established. According to lab core experiment, shear slip is simulated and a test model of fracture conductivity of riverfrac treatment in laboratory is also established. That provides a set of reliable methods for reservoir selection during riverfrac treatment.
出处
《断块油气田》
CAS
2012年第2期253-256,共4页
Fault-Block Oil & Gas Field
基金
黑龙江省自然科学基金项目"清水压裂增产机理及适应储层条件研究"(E201015)
