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Using Type Wells to Economically Schedule DUC Well Completions

机译:在经济上使用Type Wells计划Duc井完成

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In response to the low hydrocarbon price environment, most operators have decreased the number of rigs actively drilling wells (Cui 2016, Chapman et al. 2016). However, the production decline in wells completed in a given timeframe has undergone far more change than the count of active rigs. In many cases, wells must be drilled to meet contractual lease obligations but are not being completed due to uncertain economic conditions. Type curves are valuable tools to predict future performance of such drilled-but-uncompleted (DUC) wells by analyzing results of existing wells exhibiting similar characteristics. It is reasonable to assume, while considering reservoir characterization and completion engineering, that existing wells can predict the performance of future wells. However, to generate a larger sample size with which to construct the type curves, data can be normalized by a particular variable. A normalized curve is then scaled by an adjustment associated with the new well to produce its expected production profile. This same process also allows type curves to be applied to other areas with different reservoir properties or completion parameters. Analysis focuses on applying normalized type curves to estimate DUC well performance and populate a ranking system to guide the completion planning process. Reservoir material balance and surface network simulation are also utilized to understand subsurface effects and identify possible facility constraints above ground. Additionally, there is a brief discussion regarding type well best practices to aid in the analysis.
机译:为了应对低碳氢化合物价格环境,大多数运营商已经减少了积极钻井井的钻机数量(Cui 2016,Chapman等,2016)。然而,在给定的时间范围内完成的井中的生产下降经历了比主动钻机的计数更大的变化。在许多情况下,必须钻井井以满足合同租赁义务,而是由于经济状况不确定而没有完成。类型曲线是通过分析表现出类似特征的现有井的结果来预测这种钻孔但未完成的(DUC)孔的未来性能。假设是合理的,同时考虑水库表征和完成工程,现有的井可以预测未来井的表现。然而,为了产生更大的样本大小,其中构造类型曲线,可以通过特定变量归一化数据。然后通过与新井相关联的调整来缩放归一化曲线,以产生其预期的生产曲线。该相同的过程还允许应用类型曲线应用于具有不同水库属性或完成参数的其他区域。分析侧重于应用规范化型曲线来估计DUC好性能并填充排名系统以指导完成规划过程。水库材料平衡和表面网络仿真也用于了解地下效应并确定地上可能的设施限制。此外,还有一个关于型良好良好实践的简要讨论,以帮助分析。

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