CAJ | 학술논문

苏北盆地海安凹陷钻井存在钻头选型复杂，单井钻头数量使用过多，钻井周期长，钻井效率低等问题，迫切需要解决钻头优选问题．用模糊优化理论对常用钻头选型的效益指数法进行了改造完善，建立了新的钻头优选模型，对海安已钻27口井的钻头进行了优选，确定了实钻效果最佳的钻头．运用优选的钻头在现场进行钻井作业，取得优良的效果，极大提高了钻井效率，缩短了钻井周期，同时也极大简化了钻头选型．探索了一条有效解决苏北盆地海安凹陷及相邻区块钻头优选的技术路径，为高效勘探开发苏北盆地提供了有力的技术支撑．
소북분지해안요함찬정존재찬두선형복잡，단정찬두수량사용과다，찬정주기장，찬정효솔저등문제，박절수요해결찬두우선문제．용모호우화이론대상용찬두선형적효익지수법진행료개조완선，건립료신적찬두우선모형，대해안이찬27구정적찬두진행료우선，학정료실찬효과최가적찬두．운용우선적찬두재현장진행찬정작업，취득우량적효과，겁대제고료찬정효솔，축단료찬정주기，동시야겁대간화료찬두선형．탐색료일조유효해결소북분지해안요함급상린구괴찬두우선적기술로경，위고효감탐개발소북분지제공료유력적기술지탱．
Drilling in Haian Depression of Subei Basin has some problems, such as complex bit selection, too many bits used per well, long drilling period, and low drilling efficiency. The problem of the bit optimization needs urgent solutions. The efficiency index method commonly used to select bits is improved by the fuzzy opti- mization theory, and a new bit optimization model is established. After optimizing the bits used in 27 drilled well from Haian, the bits of the best drilling perfor- mance are determined. Wells are drilled by the optimization bits, and good results are attMned. Moreover, the drilling efficiency is improved, the drilling period isshortened, and the bit selection is simplified greatly. A technical way which could effectively solve the problem of the bit optimization in Haian Depression or adja- cent blocks of Subei Basin is explored. That provides strong technical assistance for efficient exploration and development in Subei Basin.