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Evolution of Completion Practices and Wellbore Geometry: A Sour Gas Carbonate Reservoir in the Wyoming Thrustbelt

机译:完井实践和井眼几何的演变:怀俄明州止推带中的酸性碳酸盐岩碳酸盐岩储层

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Successful redevelopment of the giant Whitney Canyon-CarterCreek field began in 1995, ten years after initial drilling wascompleted. Keys to this exploitation success were a bettertechnical understanding of the reservoir, the evolution ofcompletion practices and enhanced wellbore geometries.Application of these learnings fueled the infill program,producing an incremental 134 Bcf since 1995, with initial wellrates up to 60 MMcf/D.Pore volume re-interpretation in 1994 identified apotentially large, under-developed resource. Early drillingconfirmed this potential. To effectively access these reserveshowever, historical completion practices had to be redefined,given the reservoir’s fluid sensitivity and the need for betterstimulation in this low permeability, pressure-depleted system.Completion optimization focused on acid system design,diversion and debottlenecking. Emulsified acid and CO2-energized fluids increased etched half-length and loadrecovery. Better zonal isolation was achieved in a progressionfrom bridge plugs to reservoir stresses and sparse perforating.Further, tubulars were upsized to reduce pressure losses due tofriction.Wellbore geometry evolved from vertical to high angle,extended reach wells. These increasingly complex wellborescontacted more reservoir, targeting improved rock quality andthe natural fracture system. Each of these factors contributedto improved rate and recovery, but provided many operationalchallenges.
机译:惠特尼峡谷-卡特巨人的成功重建 Creek油田始于1995年,距最初的钻探工作已经十年。 完全的。取得成功的关键在于更好 对储层的技术了解,演化 完井实践和增强的井眼几何形状。 这些学习的应用推动了填充程序的发展, 自1995年以来,产量增加了134 Bcf, 速率高达60 MMcf / D。 1994年对孔体积的重新解释确定了 潜在的大型,未开发资源。早期钻探 证实了这种潜力。有效利用这些储备金 但是,必须对历史完井方法进行重新定义, 考虑到油藏的流体敏感性以及对更好的需求 在这种低渗透性,压力耗尽的系统中进行增产。 完成优化的重点是酸系统的设计, 转移和消除瓶颈。乳化酸和CO2- 通电的流体增加了蚀刻的半长和载荷 恢复。在进行过程中实现了更好的区域隔离 从桥塞到油藏应力和稀疏射孔。 此外,对管子进行了加大尺寸处理,以减少由于以下原因造成的压力损失: 摩擦。 井眼的几何形状从垂直角度演变为大角度, 延伸井。这些日益复杂的井筒 联系了更多的储层,以改善岩石质量和 自然断裂系统。这些因素中的每一个都做出了贡献 改善回收率和回收率,但提供了许多可操作的 挑战。

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