半潜式平台大直径三筒取心技术
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摘要
在半潜式平台进行取心作业时,取心效果除受传统因素影响外,平台的升沉会对取心参数尤其是钻压的控制带来极大的挑战,同时,取心过程中岩心也极易因平台升沉而被拔断从而对取心进尺造成影响。介绍了在半潜式平台成功应用大直径三筒取心技术的案例,通过对工具选型及工艺措施的严格控制,完成两趟大直径三筒取心作业,累计取心进尺55.3 m,平均取心收获率100%。文中总结分析了在半潜式平台进行作业时取心技术的难点和现场工艺的实施,形成了一套适应性较强的半潜式平台大直径三筒取心技术,包括取心过程中工艺参数的把控和割心时方法的选取以及出心方式的选择,实现了大直径三筒取心技术在半潜式平台的成功应用,为该区块的取心作业积累了经验。
When the coring operation is performed on a semi-submersible platform, not only the coring results are influenced by traditional factors, but the heave of the platform brings great challenges to the control of the coring parameters, especially the weight on bit. In addition, the core is also easily broken in the process of coring due to the platform' s heave, and consequently the coring footage is affected. A successful application case of large-diameter three-barrel coring technology on semi-submersible platforms was introduced. In this case, two large-diameter three-barrel coring operations are completed by controlling tool selection and process measures strictly. Its cumulative coring footage is 55.3 m and average coring rate is 100%. Then the difficulties of coring technology and the implementation of on-site processes during coring on the semi-submersible platform were analyzed systematically, and the large-diameter three-barrel coring technology highly suitable for semi-submersible platform was formed. This technology is mainly composed of the control of process parameters in the process of coring, the selection of core cutting methods, and the choice of core tripping out methods. In this way, the large-diameter three-barrel coring technology is successfully applied on the semi-submersible platform. And its successful application accumulates the experience for the coring operations in this block.
When the coring operation is performed on a semi-submersible platform, not only the coring results are influenced by traditional factors, but the heave of the platform brings great challenges to the control of the coring parameters, especially the weight on bit. In addition, the core is also easily broken in the process of coring due to the platform' s heave, and consequently the coring footage is affected. A successful application case of large-diameter three-barrel coring technology on semi-submersible platforms was introduced. In this case, two large-diameter three-barrel coring operations are completed by controlling tool selection and process measures strictly. Its cumulative coring footage is 55.3 m and average coring rate is 100%. Then the difficulties of coring technology and the implementation of on-site processes during coring on the semi-submersible platform were analyzed systematically, and the large-diameter three-barrel coring technology highly suitable for semi-submersible platform was formed. This technology is mainly composed of the control of process parameters in the process of coring, the selection of core cutting methods, and the choice of core tripping out methods. In this way, the large-diameter three-barrel coring technology is successfully applied on the semi-submersible platform. And its successful application accumulates the experience for the coring operations in this block.
引文
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[9]刘学峰.确定斜井起下管柱摩擦力的三维力学模型[J].江汉石油学院学报,2004,26(4):161-163.LIU Xuefeng.Three-dimensional mechanical model for determining the friction of the pipe string in inclined shaft[J].Journal of Jianghan Petroleum Institute,2004,26(4):161-163.
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[11]杨立文.古巴Majaguillar稠油油藏大斜度井取心技术[J].石油机械,2017,45(9):53-56.YANG Liwen.The coring technique applied in high inclined well of heavy oil reservoir in Cuba Majaguillar Block[J].China Petroleum Machinery,2017,45(9):53-56.
[2]董星亮,曹式敬,唐海雄,陈建兵.海洋钻井手册[M].北京:石油工业出版社,2011.DONG Xingliang,CAO Shijing,TANG Haixiong,CHEN Jianbing.Marine drilling manual[M].Beijing:Petroleum Industry Press,2011.
[3]杨群鑫.川式常规取心工具特点及其使用[J].石油钻采工艺,1986,8(1):33-42.YANG Qunxin.Characteristics and use of conventional coring tools for Sichuan[J].Oil Drilling&Production Technology,1986,8(1):33-42.
[4]苏洋.伊拉克格拉芙油田Mishrif储层长筒取心技术[J].石油钻探技术,2017,45(5):30-35.SU Yang.Long-barrel coring technique for the Mishrif reservoir in the Garraf Oilfield,Iraq[J].Petroleum Drilling Techniques,2017,45(5):30-35.
[5]杨群鑫,李昌全,吕金悌.从现场试验谈川东地区破碎地层的取心[J].天然气工业,1983,3(1):33-36.YANG Qunxin,LI Changquan,LYU Jinti.Discussion on crushing ground crushing in east sichuan region from field tests[J].Natural Gas Industry,1983,3(1):33-36.
[6]苏洋,杨立文,刘兴欣.肯基亚克盐下油田小井眼取心技术[J].石油钻采工艺,2018,40(1):58-62.SU Yang,YANG Liwen,LIU Xingxin.Slim hole coring technology in Kenkyak sub-salt oilfield[J].Oil Drilling&Production Technology,2018,40(1):58-62.
[7]杨群鑫,陈鼎元.龙四深井灰岩长筒取心试验[J].石油钻采工艺,1982,4(4):15-19.YANG Qunxin,CHEN Dingyuan.Long-deep wells limestone long-tube coring test[J].Oil Drilling&Production Technology,1982,4(4):15-19.
[8]王建宁,刘畅,艾中华,沈海超,陈保华,万州亮.萨哈林NV-3井长筒取心技术[J].石油钻探技术,2015,43(3):130-134.WANG Jianning,LIU Chang,AI Zhonghua,SHEN Haichao,CHEN Baohua,WAN Zhouliang.Long barrel coring technology for the Well NV-3 in Sakhalin Island[J].Petroleum Drilling Techniques,2015,43(3):130-134.
[9]刘学峰.确定斜井起下管柱摩擦力的三维力学模型[J].江汉石油学院学报,2004,26(4):161-163.LIU Xuefeng.Three-dimensional mechanical model for determining the friction of the pipe string in inclined shaft[J].Journal of Jianghan Petroleum Institute,2004,26(4):161-163.
[10]史成发.印尼厘茂油田INJ-02B井密闭取心复杂情况处理与分析[J].石油钻采工艺,2015,37(4):39-41.SHI Chengfa.Handling and analysis of downhole troubles during sealed coring in Well INJ-02B in Limau Oilfield of Indonesia[J].Oil Drilling&Production Technology,2015,37(4):39-41.
[11]杨立文.古巴Majaguillar稠油油藏大斜度井取心技术[J].石油机械,2017,45(9):53-56.YANG Liwen.The coring technique applied in high inclined well of heavy oil reservoir in Cuba Majaguillar Block[J].China Petroleum Machinery,2017,45(9):53-56.