Midland盆地枯竭叠层油藏着陆点优化案例研究

Cyrille Defeu, Ryan Williams, Dan Shan, Joel Martin, D. Cannon, Kyle Clifton, Chad Lollar
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引用次数: 2

摘要

美国的非常规油气藏通常由叠层油气藏组成,通常厚度从几百英尺到几千英尺不等。根据地质、矿物学、岩石结构和流体类型的不同,这些层叠产层通常被划分成不同的地层。事实证明,这是一个挑战,因为需要许多堆叠/交错的水平井来提供有效的储层覆盖。在邻近地层现有生产井的情况下,选择正确的着陆位置变得更加具有挑战性,因为压力耗尽及其对裂缝扩展的相关影响需要考虑垂直间距和时间。在这项研究中,我们概述了一种综合方法,解决了Midland盆地Wolfcamp a地层的四维水平井布置挑战,使用先进的水力裂缝建模来校准水力裂缝几何形状,并将Lower Spraberry和Wolfcamp b的五口生产井进行历史匹配。损耗效应。然后,将这些数据结合起来形成一个四维地质模型,通过对所得到的复杂水力裂缝几何形状和随后的油气产量建模,进行完井优化研究。该综合工作流程使用了大量高质量的数据集和来自多个学科的专家的意见,为这一具有挑战性的部分枯竭的叠层产层提供了全面的评估和明确的建议。虽然这项研究只针对Midland盆地的Lower Spraberry和Wolfcamp A和B组,但工作流程的许多部分也适用于其他盆地及其独特的地层。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Case Study of a Landing Location Optimization within a Depleted Stacked Reservoir in the Midland Basin
Unconventional plays across the US are often made of stacked pays, typically ranging from a few hundred to thousands of feet thick. These stacked pay intervals are generally segregated into different formations as dictated by differences in geology, mineralogy, rock fabric, and fluid type. This proves to be a challenge because many stacked/staggered horizontal wells are required to provide effective coverage of the reservoir. Selecting the right landing location can become even more challenging in an environment with existing producing wells in adjacent formations because pressure depletion and its associated effects on fracture propagation necessitate consideration of vertical spacing and time. In this study, we outline an integrated approach that addresses a four-dimensional horizontal well placement challenge in the Midland basin's Wolfcamp A formation using advanced hydraulic fracture modeling to calibrate hydraulic fracture geometries and history match five producing wells in both Lower Spraberry and Wolfcamp B. The optimal landing location within the Wolfcamp A was determined based on an assessment of reservoir quality, rock mechanics, unique structural features, and depletion effects. These data were then combined to form a 4D geomodel that enabled a completion optimization study via modeling of the resulting complex hydraulic fracture geometry and subsequent hydrocarbon production. This integrated workflow, using a wide array of high-quality datasets and the input of experts from multiple disciplines, yielded a comprehensive assessment and clear recommendations for this challenging partially depleted stacked pay interval. Although this study is specific to the Midland basin's Lower Spraberry and Wolfcamp A and B formations, many sections of the workflow apply to other basins and their unique strata.
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