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首页> 外文会议>Geothermal Resources Council annual meeting >Can Geologic Factors be Predictive for Distinguishing between Productive and Non-productive Geothermal Wells?
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Can Geologic Factors be Predictive for Distinguishing between Productive and Non-productive Geothermal Wells?

机译：地质因素可以预测生产性和非生产性地热井之间的区别吗？

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Geologic data are examined in order to evaluate whether certain geologic characteristics occur in higher abundance or higher magnitude along geothermal production wells relative to nonproductive wells. A 3D geologic map, a 3D stress model, and fault-slip modeling are used to estimate fourteen different geologic factors that are hypothesized to control or be correlated with well productivity. The geologic factors are; heat, fault-damage zone thickness, distance from active faults, fault intersection/termination density, fault curvature, slip tendency of faults, dilation tendency of faults, dilation resulting from modeled fault slip, normal stress reduction resulting from modeled fault slip, Coulomb shear stress increase resulting from modeled fault slip, the summed thickness of'favorable' lithologies within a borehole, the summed thickness of fault damage zones in favorable lithologies within a borehole, the distance along the borehole to the nearest geologic contact, and the thickness of individual stratigraphic units. These geologic factors are quantified along fifty wells at Brady geothermal system, including twelve production wells and thirty-one non-productive wells. Results indicate that geologic factors such as stress changes associated with faulting, nearness to and thickness of fault zones, distance from geologic contacts, and heat occur in higher magnitude or higher abundance along production wells relative to non-productive wells. These geologic factors may play an important role, controlling the locations and distribution of fluid circulation in geothermal fields.
机译：检查地质数据以评估相对于非生产井，地热生产井中某些地质特征是否以更高的丰度或更高的幅度发生。使用3D地质图，3D应力模型和断层滑动模型来估计十四种不同的地质因素，这些因素被假定为控制或与油井产能相关。地质因素是：热，断层破坏带厚度，与活动断层的距离，断层交汇/终止密度，断层曲率，断层滑动趋势，断层扩张趋势，由模拟断层滑动引起的膨胀，由断层滑动引起的法向应力减小，库仑剪切由模拟的断层滑动，井眼中“有利”岩性的总厚度，井眼中有利岩性的断层破坏带的总厚度，沿井眼到最近的地质接触点的距离以及单个岩层的厚度导致的应力增加地层单位。这些地质因素在布雷迪地热系统的50口井中进行了量化，包括12口生产井和31口非生产井。结果表明，与非生产井相比，沿生产井以更高幅度或更高丰度发生诸如与断层相关的应力变化，与断层区域的距离和厚度，距地质接触的距离以及热量等地质因素。这些地质因素可能在控制地热田中流体循环的位置和分布方面起着重要作用。

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