钻完井过程中储层动态裂缝宽度研究进展

DYNAMICS FRACTURE WIDTH EVALUATION AND APPLICATION STUDY IN DRILLING AND COMPLETION PROCESS

碳酸岩盐储层裂缝广泛发育且分布复杂,在这类储层的钻完井过程中,井筒液柱压力作用于裂缝壁面,易造成裂缝的突然开启和闭合,极易引起漏失。因此,防漏堵漏的关键在于准确的预测地层中的裂缝宽度及变化规律。目前储层动态裂缝宽度预测国内外研究均较多,为了更好地了解国内外动态裂缝宽度预测方法的发展情况,为此,从静态到动态,裂缝模型建立到计算机模拟技术以及漏失控制技术等方面对前人研究成果进行回顾和展望,从而对动态裂缝宽度研究理论有一个新的认识,有利于钻完井过程中储层动态裂缝宽度预测的进一步研究。

Fractured reservoir is developed widely and distributed complicatedly.Fluid column pressure of borehole acts on the sides of fracture,is very easy to make the fracture open and close suddenly,and lead to loss in drilling and completion process of the kind of reservoir.So key of sealing is accurate to forecast the fracture width and change rule.At present,reservoir dynamic crack width prediction research both at home and abroad is more,previous research results were reviewed and discussed from static state to dynamic state,model to computer simulation and loss control technology,and a new understanding to the dynamic crack width research theory was obtained,it is helpful for further study on prediction dynamic crack width in drilling and completion process.