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Improved Horizontal Well Placement and Performance Using a Bit Inclination Measurement Tool

机译：使用钻头倾角测量工具改善水平井的位置和性能

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摘要

Accurate geological placement of a lateral in the sweetestrnportion of the reservoir plays a major role in optimizingrnproduction rates and increasing recovery from horizontalrnwells, particularly for complex reservoirs with heterogeneousrnfeatures. Horizontal wells have thus been routinely steeredrnboth geologically and geometrically using evaluationrnmeasurements from conventional bottom hole assemblies withrnsensor points some 50 feet away from the bit. This implies thatrncorrection runs and it’s effective response time and footagernwill be dependent on directional drilling personnel proficiencyrnand tool performance relative to formation type. It is notrnsurprising thus, that a sizeable part of the reservoir is drilledrnsub-optimally, and in some cases the eventual well borernundulation has caused impossible completions, developedrnwater sumps and have also given birth to speedyrnbreakthroughs of gas and water. All of these have impactedrnproduction negatively, and caused unnecessary oil deferment,rnearly work-over and associated cost overrun on budget.rnThe ideal option would thus be to minimize thernundulation while geo-steering the lateral along the sweetestrnportion of the reservoir in an attempt to minimize attendantrnproduction problems and hence allow efficient and earlyrncompletions.rnA tool has been developed which measures well borerninclination 1 foot away from the drilling bit. Shell WestrnNigeria introduced the At bit Inclination measurement tool tornhorizontal well drilling on the Opukushi 26 well in March 99.rnThis was to complement multiple depth propagation resistivityrnand quadrant density-neutron measurements while drillingrnutilized in horizontal evaluation, to enable full wellborerngeologic steering with optimized response time for correctingrnchanges in the desired direction. The result is a significantrnimprovement in the ratio between actual versus predictedrnproduction figures as compared to previously drilled wellsrnexecuted without the combination measurement. It also aidedrngeosteering decision, improved directional performance andrnenhanced delivery of better quality well.rnThis paper therefore reviews the SPDC horizontalrnwells experience in identifying the impact of deviation profilesrnand lateral placement with respect to production performance,rnand how the use of the near bit inclination tool along with thernformation evaluation measurements has resulted in noticeablernimprovement.
机译：在储层最甜段中，侧向的准确地质布置在优化产量和增加从水平井的采收率方面起着重要作用，特别是对于具有非均质特征的复杂储层。因此，常规的地质和几何上的水平井已经使用常规井底钻具组合的评估测量方法进行了地质控制，传感器的位置距钻头约50英尺。这意味着进行校正，其有效响应时间和进尺将取决于定向钻井人员的熟练程度以及相对于地层类型的工具性能。因此，不足为奇的是，对储层的相当大的一部分进行了次优钻探，这在意料之中，并且在某些情况下，最终的井眼成孔已经导致了不可能的完井，积水，并且催生了天然气和水的快速突破。所有这些都对产量产生了负面影响，并导致不必要的石油延期，几乎没有的工作时间和相关的预算超支。rn因此，理想的选择是在使油藏最甜的部分沿侧向进行地质导向的同时，尽量减少对油井的扰动。随之而来的是生产上的问题，因此可以进行有效的早期完井。已经开发了一种工具，可以测量距钻头1英尺的井眼倾角。壳牌WestrnNigeria于99年3月在Opukushi 26井上推出了Atbit倾角测量工具，用于水平水井钻井。这是对多深度传播电阻率和象限密度中子测量的补充，同时在水平评估中进行了钻井，以实现具有最佳响应时间的完整井眼地质地质导向校正所需方向的变化。与没有组合测量的先前钻探的井相比，结果是显着提高了实际产量与预测产量之间的比率。因此，本文还回顾了SPDC水平井在确定偏差剖面和侧向布置对生产性能的影响方面的经验，以及近钻头倾角工具的使用方法以及相关的经验。信息评估测量已带来显着的改进。

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  • 来源
    《Technology advances》|2000年|p.1-18|共18页
  • 会议地点 Calgary(CA)
  • 作者

    Lateef Muritala; Charles Onwuazo;

  • 作者单位

    Femi Adewumi, Osaretin Aibangbe, Schlumberger Anadrill;

    Femi Adewumi, Osaretin Aibangbe, Schlumberger Anadrill;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 定向钻井;
  • 关键词

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