摘要
随着深层油气资源的勘探开发,多钻遇非均质性强、可钻性差等复杂难钻地层,从而导致钻头适应性差、钻井效率低下,大幅延长钻井周期和钻井成本。因此,针对非均质地层钻头适应性差等问题,该研究利用全尺寸钻头实验架,开展了多类非均质岩心全尺寸钻头破岩实验,对比分析了不同非均质性地层对PDC钻头动力学特性(动态钻压、扭矩、进尺和三向加速度)的影响。研究结果表明:PDC在穿越地层交界处时,会产生剧烈的振动;从软地层穿越到硬地层,PDC钻头的激振要比从硬地层穿越到软地层更强;两种地层性质之间的差距越大,PDC钻头穿越两种地层交界处时振动越强。研究结果可为非均质地层钻进钻头选型提供一定的理论指导。
With the exploration and development of deep oil and gas resources,more drilling encounters complex and difficult formations,such as strong heterogeneity and poor drillability,which leads to poor bit adaptability and low drilling efficiency,and greatly prolongation of drilling cycle and drilling cost.Therefore,aiming at the problems of poor adaptability of drill bits in heterogeneous layers,this study uses the full-size drill bit test rack to carry out several kinds of rock breaking experiments of full-size drill bits in heterogeneous cores,and compares and analyzes the influence of different heterogeneous formations on the dynamic characteristics of PDC bits(dynamic WOB,torque,footage and three-way acceleration).The results show that PDC will produce violent vibration when passing through the boundary of strata.When a PDC bit passes through a soft formation to a hard formation,the vibration is stronger than when it passes through a hard formation to a soft formation.The larger the difference between the two formation properties,the stronger the vibration of the PDC bit when traversing the boundary between the two formations.The research results provide some theoretical guidance for the selection of drilling bit in heterogeneous layers.
作者
庞照宇
幸雪松
武治强
马茂原
毛良杰
PANG Zhaoyu;XING Xuesong;WU Zhiqiang;MA Maoyuan;MAO Liangjie(Beijing Research Center of CNOOC(China)Co.,Ltd.,Beijing 100028,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China)
出处
《实验技术与管理》
CAS
北大核心
2023年第3期44-51,共8页
Experimental Technology and Management
基金
国家自然科学基金“基于钻杆接触碰撞作用的深水钻井隔水管动力特性与磨损机理研究”(52174006)
中国石油科技创新基金“天然气水合物开采立管动力特性及安全控制技术研究”(2020D-5007-0210)
中海油科研项目“文昌油田群井壁稳定性级安全钻井工艺研究”(CCL2022RCPS0139PSN)。
