摘要
海上油气钻探由浅层向深层发展,下部地层的岩石强度和硬度增加,可钻性变差。对可钻性级值的确定是决定钻头选型和提速措施的前提。在传统的可钻性级值计算方法的基础上,考虑井底围压产生的影响,结合室内实验数据,利用粒子群分析方法对岩石强度、硬度、弹性模量、内聚力等强度参数进行拟合,建立考虑井底压差条件的可钻性级值计算方法。基于Drillworks平台,通过自定义计算模块进行编程计算,得出海上某气田硬地层的可钻性级值,并对比了水力脉冲空化射流与扭力冲击钻具的提速效果,就该区块开发井的提速工具选择提出了建议。
With drilling deeper and deeper,the rock high strength and hardness causes bad drill ability.For hard formation in offshore oilfields,the drill ability analysis is the basis for the drill bit optimization and accelerator selection.This paper based on conventional calculate method,additionally,considering of peripheral pressure's effect,combined with experiment data,a calculation method of drillability grade value considering bottom hole pressure difference condition is established by applying ion group method to calculate the rock strength,hardness,Young's modulus,cohesion strength.Based on the drill-works software's platform,using the calculation method,this paper gain the drill ability grade value for an offshore oilfield.Meanwhile,the speed-up effect of hydraulic pulse cavitating jet and torsional impact drilling tool is compared,and suggestions on the selection of speed-up tools for development wells in this block are put forward.
作者
王名春
刘书杰
耿亚楠
严维锋
WANG Mingchun;LIU Shujie;GENG Ya'nan;YAN Weifeng(CNOOC Research Institute,Beijing 100028,China;CNOOC Shanghai Limited,Shanghai 200335,China)
出处
《重庆科技学院学报（自然科学版）》
CAS
2020年第3期17-20,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家科技重大专项“海外重点油气田开发钻采关键技术”(2017ZX05032-004)。
关键词
海洋钻井
可钻性级值
围压
钻进速度
deep well
drill ability grade value
peripheral pressure
accelerator
