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首页> 外文会议>IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition >Casing Drilling Technology as the Solution for Severe Lost Circulation: LSE Casing Drilling Pilot Project Case Study
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Casing Drilling Technology as the Solution for Severe Lost Circulation: LSE Casing Drilling Pilot Project Case Study

机译：套管钻井技术作为严重丢失的循环解决方案：LSE套管钻探试点项目案例研究

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The Louise(LSE)is one of the primary oil-producing fields in the Pertamina EP Asset V.This area has an issue with high potential of total losses in the top section [~400 m measured depth(MD)],which causes an inability to set the 13.375-in.casing at the required depth.As a result,this problematic zone must be drilled conventionally in two different sections,17.5 in.and 12.25 in.,whilst combating losses.Pertamina EP spent up to 10 days as nonproductive time(NPT)to combat losses,resulting in high investment cost.A new innovative method was required to face this challenge with the objective of drilling deeper through the loss zone in a single run in a more effective and efficient and a safer way.Nondirectional casing drilling technology was introduced to solve this problem.The casing drilling system simultaneously drills and runs the casing through the lost circulation zone in a single run,which provides a more efficient and a safer operation.Its plastering effect helps strengthen the wellbore by smearing cuttings into the wellbore wall,sealing pores in the formation to reduce fluid loss.At the same time,it saves the rig operating days by eliminating the loss-combating days and the dedicated casing run.The key driver of this technology is the drillable alloy casing bit specially made for drilling vertical or tangential wells,which can be drilled out by any standard PDC or milled tooth after it has drilled to total depth(TD)and the casing has been cemented in place.On the pilot casing drilling project well,this system successfully drilled 351.25 m of 13.375-in.× 17.5-in.section to the casing point in a single run passing through the problematic loss zone.The 13.375-in.casing was cemented in place,and the casing bit was successfully drilled out using a conventional 12.25-in.PDC bit.Compared to the conventionally drilled offset wells,this technology enabled up to 220 m deeper 13.375-in.casing setting depth,which consequently eliminated the necessity of loss-combating activity in the 12.25-in.hole section.The implementation of the casing drilling system solved the lost circulation problem and provided an additional benefit of eliminating a dedicated casing run.The casing drilling technology helped Pertamina EP to reduce the well drilling time by up to 4.75 operating days,saved up to USD 555,913 of drilling cost,and achieved 50 m deeper well TD compared to the plan.The pre-execution engineering work was one of the key activities leading to the success.
机译：Louise（LSE）是Pertamina EP Asset V中的主要油田之一。该地区具有高潜力的顶部损失的问题[〜400米测量深度（MD）]，这导致了一个无法在所需深度上设置13.375-in.as，结果，必须在两个不同的部分中传统钻取这个问题区域，17.5 in.12.25，而打击损失。普利米纳EP最多10天非营模时间（NPT）对抗损失，导致高投资成本。需要新的创新方法来面对这一挑战，目的是在一个更有效和高效，更安全的方式中钻取通过损失区域深入钻探。引入了非自动套管钻井技术来解决这个问题。套管钻孔系统同时钻孔并在一次运行中通过丢失的循环区运行套管，这提供了更有效和更安全的操作。抹灰效果有助于加强井通过将切屑涂抹到井筒壁中，在地层中密封毛孔以减少流体损失。同时，它通过消除损失打击天和专用的外壳运行来节省钻机运行日。这项技术的关键驱动器是专门用于钻井垂直或切线孔的可钻合金套管，其可以通过任何标准的PDC或磨牙钻到总深度（TD），并且壳体已经粘合到位。先进的套管钻孔项目嗯，该系统成功钻了351.25米，×17.5英寸×17.5英寸。×17.5- in.Sining点在一次运行中通过有问题的丢失区。13.375-in.casing巩固到位，套管钻头使用传统的12.25-in.pdc bit.com成功钻取到常规钻孔的偏移井上，这项技术最高可达220米的13.375-in.casing深度，从而消除了损失打击的必要性在12.25英寸井段中。壳体钻井系统的实施解决了丢失的循环问题，并提供了消除专用套管运行的额外好处。套管钻井技术帮助Pertamina EP减少了钻井钻井时间4.75营运日，钻取成本的555,913美元，达到50米，与计划相比，50米井井。预先执行工程工作是导致成功的关键活动之一。

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