水泥浆失重的影响因素实验研究  

Study on the Factors Affecting the Weight Loss of Cement Slurry.

作　　者：柳亚芳[1] 李玉勇[1] 王言峰 

机构地区：[1]胜利石油管理局钻井工艺研究院 [2]中国石油天然气勘探开发公司

出　　处：《钻井液与完井液》2009年第5期47-49,共3页Drilling Fluid & Completion Fluid

基　　金：863计划项目"超深井钻井技术研究"(2006AA06A19-2)资助

摘　　要：水泥浆失重是导致环空窜流的主要原因之一。利用自行研制的水泥浆失重模拟装置研究了井斜角、套管偏心度、环空间隙和水泥浆失水量等因素对水泥浆失重的影响。结果表明,水泥浆失重速度随井斜角的增大、偏心度的增大和环空间隙的减小而加快,随着失水量的减小而减慢。因此,在井身结构设计时要保证足够的环空间隙,减小水泥浆与环空壁面的接触面积,降低水泥浆的失重速度;在钻井过程中,特别是在钻小井眼及斜井时,一定要做好套管居中工作,尽量减小套管偏心度,以防止环空窜流现象的发生;在固井中,应尽量提高水泥浆的稳定性,降低其失水,以提高水泥浆自身的压稳防窜能力。The weight loss of cement slurry is one of the major causes resulting in annular channeling.Factors affecting cement slurry weight loss,such as hole angle,casing eccentricity,annular clearance,and water loss of cement slurry,are studied using a weight loss simulation device.The study shows that the speed of cement slurry weight loss is directly proportional to hole angle,and casing eccentricity,and is inversely proportional to annular clearance and water loss of cement slurry.This means a reasonably wide annular clearance,a low water loss of cement slurry should be considered in casing program design.Casing eccentricity should be minimized during drilling.The property of cement slurry should be kept stable during cementing,in an effort to avoid channeling.

关 键 词：固井 水泥浆失重 水泥浆胶凝 防窜 

分 类 号：TE256.9[石油与天然气工程—油气井工程]