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首页> 外文会议>SPE Oil and Gas India Conference and Exhibition >Drilling Operation Improvement in Overpressure Zone with Managed Pressure Drilling Technology in LFN Field
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Drilling Operation Improvement in Overpressure Zone with Managed Pressure Drilling Technology in LFN Field

机译：LFN场管理压力钻井技术钻探运行改进

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Drilling activity in Seram Island block is one of the most active in the Eastern Region of Indonesia. Drilling operator in the block has conducted drilling of 2 (two) exploration wells, where one of the well reached total depth to 19,230 ft. The well is one of the deepest onshore well in Indonesia. Both exploration wells have target to penetrate Manusela Formation as objective reservoir. Actual drilling depth of the first exploration well LFN-1 in LFN field is 14,525 ft and the second well LFN-2 is 19,230 ft. The drilling effort in the LFN field faced many challenges, such as those experienced in LFN-1 well during drilling 8-1/2" hole section in Lower Nief formation whose lithology is limestone, partial loss occurred and in the consecutive formation of Kola with Shale whose lithology contained overpressure zone resulting in kick and well control effort has to be taken. This shows that the drilling operation in 8-1/2" hole section there is a narrow window of pressure regime between Pore Pressure (PP) and Fracture Pressure (FP) which is estimated to be ± 2 ppg. Thus drilling operator is required to use the latest method or technology to overcome the challenges and to finish drilling safely. Efforts that were made to minimize operation problems in well LFN-1 have been analyzed and learned to be improvement on well LFN-2. One of the solutions selected was to use current well-known technology which is Manage Pressure Drilling (MPD) method on well LFN-2. The MPD is to be utilized on 8-1/2" hole section. The purpose of the application of the MPD method is to keep the Bottom Hole Pressure (BHP) to be constant in between Pore Pressure (PP) and Fracture Pressure (FP) thus minimizing the occurrence of losses and kick at the same time. The advantages of MPD usage are that we can make BHP constant during pipe connection so the hole does not allow kick and at the time of drilling, as it passes through the overpressure zone which is up to 17 ppg, the influx can be detected and anticipated quickly. With the application of MPD method on LFN-2 well in 8-1/2" hole section, LFN-2 well could go according to plan and there was no problem as experienced before in well LFN-1. This is a good achievement in improving the performance of drilling at exploration wells with depth up to 19,230 ft.
机译：血清岛街区的钻井活动是印度尼西亚东部地区最活跃的活动之一。街区钻井操作员已经进行了2（两种）勘探井，其中一个良好的深度达到了19,230英尺。井是印度尼西亚最深处的良好良好的井之一。两种勘探井都有旨在将Manusela形成作为客观储层。 LFN字段中的第一勘探井LFN-1的实际钻孔深度为14,525英尺，第二孔LFN-2为19,230英尺。LFN领域的钻井努力面临着许多挑战，例如在钻井期间LFN-1良好经历的挑战8-1 / 2“孔部分在较低的底层形成的岩石学是石灰石，部分损失发生，并且在岩石的连续形成，其岩性包含过压区，产生踢球和良好的控制努力。这表明了钻孔操作在8-1 / 2“孔部分中，孔隙压力（PP）和断裂压力（FP）之间存在窄窗，估计为±2ppg。因此，钻井操作员需要使用最新方法或技术来克服挑战并安全完成钻孔。已经分析了最小化LFN-1的操作问题的努力，并学会了井LFN-2的改进。选择的一个解决方案是使用当前众所周知的技术，该技术是在LFN-2上的管理压力钻孔（MPD）方法。 MPD应在8-1 / 2“孔部分上。施加MPD方法的目的是将底部孔压力（BHP）保持在孔隙压力（PP）和断裂压力之间保持恒定（FP ）因此，同时最小化损失和踢的发生。MPD使用的优点是我们可以在管道连接期间使BHP常数使得孔不允许钻孔，并且在钻孔时，它通过超压区域这是最多17 ppg，可以快速地检测和预期流入。在8-1 / 2“孔部分中的LFN-2井上的MPD方法应用，LFN-2井可以按计划进行，没有在LFN-1之前经验丰富的问题​​。这是提高勘探井钻井性能的良好成就，深度高达19,230英尺。

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