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基于轨迹优化扩展大位移井窄安全密度窗口

沈海超 张华卫 刘畅 王建宁

沈海超, 张华卫, 刘畅, 王建宁. 基于轨迹优化扩展大位移井窄安全密度窗口[J]. 钻井液与完井液, 2017, 34(1): 65-69. doi: 10.3969/j.issn.1001-5620.2017.01.012
引用本文: 沈海超, 张华卫, 刘畅, 王建宁. 基于轨迹优化扩展大位移井窄安全密度窗口[J]. 钻井液与完井液, 2017, 34(1): 65-69. doi: 10.3969/j.issn.1001-5620.2017.01.012
SHEN Haichao, ZHANG Huawei, LIU Chang, WANG Jianning. Trajectory Optimization of Extended Reach Well to Widen Safe Drilling Window[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(1): 65-69. doi: 10.3969/j.issn.1001-5620.2017.01.012
Citation: SHEN Haichao, ZHANG Huawei, LIU Chang, WANG Jianning. Trajectory Optimization of Extended Reach Well to Widen Safe Drilling Window[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(1): 65-69. doi: 10.3969/j.issn.1001-5620.2017.01.012

基于轨迹优化扩展大位移井窄安全密度窗口

doi: 10.3969/j.issn.1001-5620.2017.01.012
详细信息
    作者简介:

    沈海超,高级工程师,博士,1982年生,毕业于中国石油大学(华东)油气工程力学专业,现在从事钻井技术研究工作。电话15010435972;E-mail:hcshen.sipc@sinopec.com。

  • 中图分类号: TE22;TE28

Trajectory Optimization of Extended Reach Well to Widen Safe Drilling Window

  • 摘要: S区块位于俄罗斯萨哈林岛东部海域,计划采用大位移井海气陆采技术进行开发。该区设计井深达12 000 m(垂深为2 800 m),水平位移约11 000 m,水平位移与垂直深度之比达3.93,初步设计四开井身结构。以往直井钻探表明,该区奥科贝凯组(Okobykaiskiy)下部及达吉组(Daginskiy)地层安全钻井液密度窗口窄(约0.3~0.4 g/cm3)、漏、塌、卡风险高,而大位移开发井相应井段窄安全密度窗口问题愈加突出。针对当前对于扩展窄安全密度窗口相关研究的不足、特别是局限于通过钻井液性能优化扩展安全密度窗口的现状,围绕窄安全密度窗口大位移井钻井难题,提出应综合力学、化学多手段全方位扩展窄安全密度窗口:首先,自井眼轨迹设计环节将优化井身剖面、改善井周围岩应力状态、扩展安全密度窗口有机结合起来,开展井眼轨迹主要参数对安全密度窗口的影响规律分析,在此基础上,兼顾井眼轨迹控制难度及施工摩阻等因素优化井眼轨迹,降低坍塌压力、提高地层破裂压力,实现安全密度窗口的先期扩展,为后续通过优化钻井液性能等手段进一步提高安全密度窗口奠定良好基础,并最终为窄安全密度窗口安全、高效钻井创造有利条件。研究形成的扩展密度窗口相关技术在S区块大位移井钻井设计中成功应用,使得目标层段安全密度窗口较轨迹优化前扩展幅度达25%~100%,对窄安全密度窗口难题的应对及防治具有指导意义。

     

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出版历程
  • 收稿日期:  2016-10-05
  • 刊出日期:  2017-01-31

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