Optimization scheme for drilling speed improvement in Chenghai 3-2 oilfield block
After the first phase of drilling,good oil and gas reservoir is discovered in the Chenghai 3-2(CH 3-2)block.Subsequently,plans are made to expand the slot and construct 24 new wells.For efficient and economic development of the CH 3-2 oilfield,based on previous geological and engineering experience,the"one trip drilling"at the third spud of the wellbore is achieved by optimization of casing program and string assembly,selection and customized design of drill bit,as well as employment of long-life screw and other ROP improvement tools.At the same time,wellbore instability and collapse are avoided by a selected drilling fluid system and appropriate drilling fluid density.With the optimized drilling plan,the drilling to completion period can be shortened by 7.35 days and efficiency can be increased by 15.24%compared to the well before optimization.The optimization plan has significant application value and practical significance for solving the problem of drilling speed improvement in this block.
drilling speed improvementcasing programbitdrilling fluidoptimization plan
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