钻井液与完井液2018，Vol.35Issue(1)：38-41,46,5.DOI:10.3969/j.issn.1001-5620.2018.01.007
压差卡钻新模型的建立与分析
The Establishment of a New Model for Differential Sticking Analysis
摘要
Abstract
Accurate prediction of differential sticking plays an important role in minimizing and even preventing pipe sticking.Models presently in use for the prediction of differential sticking are not perfect,lacking studies on the relationship between mud cakes and pressures on the borehole wall.A new differential sticking prediction model has been established based on the studies made by other researchers,taking into account those factors such as the properties of mud cakes,differential pressure and the closed contact interface between drill string and borehole wall.Analyses of differential sticking mechanisms and calculation with drilling data indicated that the closer the permeability of an external mud cake to the permeability of a mud cake formed inside the formation,the higher the pressure exerted on the borehole wall,and this is beneficial to the prevention of differential sticking.A thin high quality external mud cake with good compressibility generates a low adhesion force at the time of differential sticking which is also easy to be unloaded,thereby fundamentally realizing the prevention of differential sticking.This study will provide theoretical guidance to the prevention of differential sticking in field operations and to drilling fluid program design.关键词
卡钻/泥饼厚度/封闭接触面/黏附压差Key words
Pipe sticking/Thickness of mud cake/Closed contact interface/Adhesion differential pressure分类
能源科技引用本文复制引用
杨雪山,宋碧涛,任茂,何竹梅,欧彪,齐从丽..压差卡钻新模型的建立与分析[J].钻井液与完井液,2018,35(1):38-41,46,5.基金项目
中石化科技部项目群“龙门山前构造带雷口坡组气藏钻完井及投产关键技术研究”(P16095)和江苏油田局级项目“侧钻井提速配套技术的研究与应用”(JS17018)的部分研究内容. （P16095）
