深井钻井参数多目标可靠性优化

ABSTRACTS Multi objective Reliability Optimization of Deep Well Drilling Parameters

在多元随机钻井模式理论的基础上，提出了深井钻井参数多目标可靠性优化方法。松辽盆地北部地区深井钻井实践表明，利用可靠性优化方法可使机械钻速提高１倍左右。通过与实钻值对比分析，预测的钻头进尺、机械钻速和钻头寿命可靠度均在９５％以上，其中机械钻速平均相对误差为４．８％。

Based on the multivariable random drilling model,the multi objective reliability optimization of deep well drilling parameters is presented.The deep well drilling practice in the north area of Songliao basin showed that penetration rate could be doubled by using reliability optimization.Comparing with actural drilling value,it is indicated that the reliability of predicted bit drilling depth,penetration rate and bit life is over 95%,with the mean relative error of penetration rate being 4 8%.