不同套管偏心条件下的固井顶替界面稳定机理研究  

Research on mechanism of cementing displacement interface stability under different casing eccentric conditions

作　　者：许强 梁院科[2] 李明忠 王瑞和[4] XU Qiang;LIANG Yuan-ke;LI Ming-zhong;WANG Rui-he(Drilling Technology Research Institute, Shengli Petroleum Engineering Corporation Limited, SINOPEC, Dongying 257000, China;No.5 Oil Production Plant, PetroChina Changqing Oilfield Company, Xi＇an 710021 China;Sinopec Huabei Oilfield Service Corporation, Technology Service Company, Zhengzhou 450042, China;School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China)

机构地区：[1]中石化胜利石油工程有限公司钻井工艺研究院,山东东营257000 [2]中国石油长庆油田公司第五采油厂,西安710021 [3]中石化华北石油工程有限公司技术服务公司,郑州450006 [4]中国石油大学(华东)石油工程学院,青岛266580

出　　处：《水动力学研究与进展（A辑）》2018年第3期314-321,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(NO.51174226)~~

摘　　要：在水平井、大斜度井等特殊井型井眼内,套管偏心情况复杂,影响固井时顶替界面的稳态,不利于提高固井质量。该文借助以Hele-Shaw环空二维流动模型为基础所建立的顶替界面理论模型,以摄动法结合有限差分法进行数值求解,模拟顶替界面在不同井斜(直井、大斜度井)、不同偏心(套管向上偏心、套管向下偏心)条件下的顶替界面形态,探究套管偏心状况对顶替界面稳定性的影响机理,为从两相流体密度与流变性、顶替排量等方面综合优化固井顶替设计、提高顶替效果提供理论依据。Casing eccentric condition is complex in special types of wellbore,such as horizontal or highly-deviated well,affecting the stability of cementing displacement interface and unfavorable to improve cementing quality.By use of displacement interface theoretical model founded on the basis of Hele-Shaw two-dimensional flow pattern in the annulus,the displacement interface state can be imitated in different deviated-angle wells and in different casing eccentric conditions（eccentric upward and downward）,solving the model by finite difference method and perturbation method.Stability mechanism can be studied,which offers theoretical foundation for optimizing cementing displacement design about the displacement parameters and fluid performance parameters.

关 键 词：固井 顶替界面形态 稳定性 套管偏心 

分 类 号：TE256[石油与天然气工程—油气井工程]