基于遗传算法的钻井液流变参数计算及模式优选  

Calculation of drilling fluid rheological parameters and model selection based on genetic algorithm

作　　者：朱朋震 王越支 刘洋[2] 李明亮 ZHU Pengzhen;WANG Yuezhi;LIU Yang;LI Mingliang(College of Petroleum Engineering,Yangtze University,Wuhan 430000,China;PetroChina Southucest Oil and Gas Field Company Northeast Sichuan Gas District.Dazhou 635000,China;Tianjin Branch of CNOOC(China)Co,Ltd.,Tianjin 300452,China)

机构地区：[1]长江大学石油工程学院,湖北武汉430000 [2]中国石油西南油气田分公司川东北气矿,四川达州635000 [3]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《精细石油化工进展》2022年第4期23-26,共4页Advances in Fine Petrochemicals

摘　　要：合理选择钻井液流变模式和准确计算流变参数是优选钻井液排量、控制当量循环密度、保证井筒压力平衡的前提。为了更准确优选出适合的流变模型并计算流变参数,基于六速黏度计的读数,结合遗传算法对现场常用流变模式的流变参数进行计算分析,并通过比较相关系数形成了流变模式优选方法。实例分析表明:遗传算法相对于传统常规算法在计算精度上有不可比拟的优势;钻井液体系中,幂律模式相对于宾汉模式更适合描述钻井液流变性能。Reasonable selection of drilling fluid rheological mode and accurate calculation of rheological pa-rameters is the premise of optimizing drilling fluid displacement to control equivalent circulating density andensure wellbore pressure balance. In order to more accurately select a suitable rheological model and calculatethe rheological parameters,based on the readings of the six-speed viscometer,combined with the genetic algo-rithm,the rheological parameters of the commonly used rheological models in the field were calculated and an-alyzed,and the correlation coefficients were compared to form a rheological mode preferred method. The exam-ple analysis showed that the genetic algorithm had incomparable advantages in calculation accuracy comparedwith the traditional conventional algorithm. In the example drilling fluid system,the power-law fluid was moresuitable for describing the rheological properties of the drilling fluid than the Bingham fluid.

关 键 词：钻井液流变模式 流变参数 遗传算法 流变模式优选 钻井液流变性 

分 类 号：TE254[石油与天然气工程—油气井工程] TP18[自动化与计算机技术—控制理论与控制工程]