一种基于统计原理的环空水泥浆流动摩阻计算方法  

A Calculation Method of Annular Cement Slurry Flow Friction Resistance Based on Statistics

作　　者：来鹏飞 李晓阳[1] 钟凯 LAI Peng-fei;LI Xiao-yang;ZHONG Kai(Changqing Cementing Company,Chuanqing Drilling Engineering Co.,Ltd.,Xi’an 710016,Shannxi,China)

机构地区：[1]川庆钻探工程有限公司长庆固井公司,陕西西安710016

出　　处：《承德石油高等专科学校学报》2022年第4期27-33,共7页Journal of Chengde Petroleum College

基　　金：国家自然科学基金项目(煤层气井内隔层界面抗剪切强度弱化效应与预测模型研究):40972103;国家自然科学基金项目(钻井液/水泥浆不变条件下固井二界面泥饼固化机理与交联机制):51174180。

摘　　要：为了精确计算固井施工过程中低密度水泥浆和常规密度水泥浆的环空流动摩阻,通过收集苏里格气田苏14、苏47、苏48和桃2四个区块的固井施工数据,结合测井声幅图,基于统计原理结合最小二乘法,精确计算优选的45口井的低密度和常规密度水泥浆的环空流动摩阻。在环空返速为0.2759 m/s时,低密度水泥浆、常规密度水泥浆的环空流动摩阻分别为1.268×10^(5)、5.5131×10^(5)Pa/100 m。该理论计算结果与固井施工实际数据偏差较小。精确计算环空水泥浆流动摩阻对固井施工的压力设计、水泥浆浆柱结构设计、固井质量等具有重要的指导意义。In order to accurately calculate the annular friction resistance of low-density cement slurry and conventional-density cement slurry during cementing operation,cementing operation data from four blocks of Sulige Gas Field are collected,namely Su 14,Su 47,Su 48 and Tao 2.Combining the acoustic amplitude logging,the annular cement slurry friction resistance of the low-density and conventional-density of optimal 45 wells are accurately calculated,which is based on statistical principle and least square method.When the annular return velocity is 0.2759 m/s,the flow friction resistance of low-density and conventional-density cement slurry is 1.268×10^(5)Pa/100 m,5.5131×10^(5)Pa/100 m respectively.The theoretical calculation result has a small deviation from actual data of cementing operation.The accurate calculation of annular flow friction resistance has important guiding significance for pressure design of cementing operation,the column structure design of the cement slurry and cementing quality.

关 键 词：固井 水泥浆流动摩阻 漏失 苏里格气田 

分 类 号：TE256[石油与天然气工程—油气井工程]