Optimizing geothermal production in fractured rock reservoirs under uncertainty
Optimizing geothermal production in fractured rock reservoirs under uncertainty
复制标题
不确定性条件下优化裂隙岩储层地热生产
DOI：
10.1016/j.geothermics.2020.101906
复制
发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
Feigl, Kurt L.
中科院分区：
文献类型：
--
作者：
Patterson, Jeremy R.;Cardiff, Michael;Feigl, Kurt L.
地球能源资源在世界各地都很容易获得，但利用不足。先前的研究试图了解储层对地热生产的响应，并优化生产率以最大化地热储层的寿命利润;然而，这些研究在很大程度上忽略了地下结构的不确定性，例如优先流动路径的数量（例如，裂缝），其可用于流体和热传输。我们提出了一个简单的分析模型的组合，最大限度地提高利润的理想化的合成地热储层，同时考虑储层结构的不确定性，使用预期的净现值。对于一个典型的案例，我们发现有效的储层透射率和井间间距对理想地热储层的寿命盈利能力施加了最大的控制，并且对于给定的储层，存在临界数量的水力活动裂缝，超过该数量，额外的裂缝不会增加寿命利润。给定初始储层表征数据，我们的模型模拟预测财务结果的储层性能，运营商可以在初始勘探阶段使用。这些预测在正常作业期间也是有用的，以考虑诸如钻补威尔斯的策略，以减轻生产引起的热压降的影响。
Geothermal energy resources are highly available but under-utilized throughout the world. Previous studies have sought to understand reservoir response to geothermal production and optimize production rates to maximize lifetime profits of geothermal reservoirs; however, these studies largely overlook the uncertainty in subsurface structure, such as the number of preferential flow pathways (e.g., fractures) that are available for fluid and heat transport. We present a combination of simple analytical models that maximize the profits of an idealized synthetic geothermal reservoir, while considering reservoir structural uncertainty, using expected net present value. For a typical case, we find that effective reservoir transmissivity and inter-well spacing exert the largest controls on the lifetime profitability of an idealized geothermal reservoir, and for a given reservoir there exists a critical number of hydraulically active fractures beyond which additional fractures provide no increase in lifetime profits. Given initial reservoir characterization data, our model simulates reservoir performance that predicts financial outcomes, which operators can use during initial exploration stage. These predictions are also useful during normal operations to consider strategies, such as drilling make-up wells, to mitigate the effects of production-induced thermal drawdown.
DOI：
--
发表时间：
1995
期刊：
影响因子：
--
作者：
H. Haitjema
通讯作者：
H. Haitjema