基于遗传算法的套管柱优化设计方法  

Genetic Algorithm-based Optimized Design Method for Casing String

作　　者：何英明[1,2] 王瑞和[2] 雷杨[3] 臧艳彬[4] 何英君[2] 

机构地区：[1]中海油研究总院 [2]中国石油大学(华东)石油工程学院 [3]中国石油天然气管道局国内事业部 [4]中国石化石油工程技术研究院

出　　处：《石油机械》2012年第6期26-29,共4页China Petroleum Machinery

基　　金：国家973计划项目"深井复杂地层破岩机理与高效破岩方法"(2010CB226703);中央高校基本科研业务费专项资金资助项目"含硫气井钻完井事故诊断与评价方法研究"(09CX04006A)

摘　　要：针对复杂地质条件下套管外载荷多变的特点,建立了基于遗传算法的套管柱优化设计方法。应用遗传算法理论,确定染色体编码方式、初始种群的产生方法、染色体评估函数及遗传操作,建立基于遗传算法的套管柱优化设计模型,从而克服了传统套管柱设计方法在复杂地质条件下套管柱强度设计中运算过程复杂,无法兼顾套管成本与风险因素的缺点。对普光气田某井套管柱进行的设计验证情况表明,该方法设计结果准确可靠,既提高了套管柱可靠性,又有利于降低成本。该项研究为复杂地质条件下优化套管柱设计提供了新的方法。In light of changeable external load of casing in complex geologic conditions, the optimized method to design casing string on the basis of genetic algorithm was established. The genetic algorithm theory was applied to determine the coding mode of chromosome, production method of initial population, and evaluation function of chromosome and genetic operation. Thus, the optimized design model for casing string on the basis of genetic algo- rithm was established to overcome the defects of complex calculation process and neglect of casing costs and risk factor in the traditional design method of casing string strength concerning complex geologic conditions. The design verification of some casing string in Puguang Gasfield shows that the design method is accurate and reliable. It improves the reliability of casing string and helps to reduce the costs. The present study offers the method to optimize the design of casing string in complex geologic conditions.

关 键 词：遗传算法 套管设计 成本 染色体 种群 

分 类 号：TE925.02[石油与天然气工程—石油机械设备]