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Complex Approach to Drilling Optimization Doubled the Penetration Rates and Eliminated NPT

机译：钻探优化的复杂方法翻了一番，渗透率并消除了NPT

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Horizontal drilling and sidetracking of existing wellbores is one of the main methods of production level increase on brownfields. This paper describes the engineering study on drilling performance enhancement conducted for a group of oilfields in Western Siberia, Russia, where the operator company has just started sidetrack and horizontal drilling campaign. The first several sidetracked wells drilled were characterized by high amounts of non-productive time (NPT) due to downhole tools failures and low penetration rates (ROP). For NPT root cause analysis, drilling surface logging data (including real-time torque and drag analysis) along with downhole measurement while drilling (MWD) vibrations data was analyzed and figured out the failures mechanisms. ROP improvement process included interpretation of LWD and wireline logs and their correlation with bottomhole assembly (BHA) performance via mechanical specific energy (MSE) approach. A number of factors that led to overall unsatisfactory performance on sidetracks were identified. This included wrong bit selection, limited drilling parameters, hole quality problems and cleaning issues and several others. These issues were properly addressed with field-proven drilling optimization process, which resulted in doubling of previously achieved ROP and elimination of NPT. The next sidetrack was drilled with 40% reduction of average rig days per 1000 m. Based on experienced gained, a motorized rotary steerable system (RSS) BHA was selected for the next complex sidetrack well, and provided another record- breaking performance, with another 20% improvement of ROP. The successful techniques are currently being transferred from sidetracks to horizontal sections on new wellbores. The paper represents latest achievements of ongoing drilling optimization process, which allowed the operator company to significantly decrease time and operational costs on drilling operations. The described complex geological and technological approach, along with revised wellbore placement, have led to main project performance indicators increase and next-step completion and production solutions for enhanced hydrocarbons recovery.
机译：现有Wellbores的水平钻井和侧面是棕色地区生产水平增加的主要方法之一。本文介绍了俄罗斯西伯利亚西伯利亚一群油田进行的钻井性能增强工程研究，运营商公司刚刚开始侧面侧面和水平钻探活动。由于井下工具故障和低渗透率（ROP），钻孔的第一种钻孔的特征在于高量的非生产时间（NPT）。对于NPT根本原因分析，分析钻井（MWD）振动数据的同时钻探表面测井数据（包括实时扭矩和拖曳分析）以及井下测量，并分析了故障机制。 ROP改进过程包括通过机械特定能量（MSE）方法对LWD和有线记录的解释及其与底孔组件（BHA）性能的相关性。确定了导致Sidetracks整体不满意表现的许多因素。这包括错误的位选择，有限的钻井参数，孔质量问题和清洁问题以及其他几个。这些问题得到了妥善解决了现场证明的钻井优化过程，导致先前取得的ROP和消除NPT的加倍。下一个侧面钻入每1000米的平均钻机天减少40％。基于经验丰富的所获得的，选择电动旋转可操纵系统（RSS）BHA用于下一个复合物侧面，并提供另一种记录断裂性能，再加上ROP的20％改善。目前正在从侧面转移到新井喷的水平部分的成功技术。本文代表了正在进行的钻探优化过程的最新成果，允许操作员公司在钻井业务下显着降低时间和运营成本。所描述的复杂地质和技术方法以及修正的井筒放置，导致了主要的项目性能指标增加和下一步完成和生产解决方案，用于增强碳氢化合物恢复。

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