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首页> 外文期刊>SPE Reservoir Evaluation & Engineering >Coupled Geomechanical and Reservoir Modeling Investigating Pqroelastic Effects of Cyclic Steam Stimulation in the Cold Lake Reservoir
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Coupled Geomechanical and Reservoir Modeling Investigating Pqroelastic Effects of Cyclic Steam Stimulation in the Cold Lake Reservoir

机译：耦合地质力学和储层模型研究冷湖水库中循环蒸汽刺激的质弹效应

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摘要

The heating of bitumen reservoirs by cyclic steam stimulation (CSS) requires high pressures and temperatures that disturb the soil matrix. This disturbance results in a dilation of the soil matrix, creating regions of enhanced permeability and porosity, which impact both the injection and production cycles of steam stimulation and the porous zones not hydraulically connected to the reservoir. The volumetric strain changes reach far beyond the region of injection and include areas of both expansion and compression. The magnitude of the volumetric strains may result in significant displacements and strains being transferred to porous zones outside the reservoir. This can result in observable pressure changes in an otherwise hydraulically static system. Pressure data at an observation well drilled to monitor aquifer pressures showed a significant response to the CSS process occurring in the reservoir approximately 300 m below the aquifer. Coupled geomechanical and reservoir modeling and an analytical calculation both show that this pressure behavior is attributed to the poroelastic response of the aquifer caused by the CSS process occurring in the reservoir. This paper describes the field data, the methodology of the coupled reservoir and geomechanical modeling, and the result of the analysis of the field data with the coupled model. The analysis shows clearly that the aquifer response is not caused by a hydraulic communication with the reservoir. It also shows the capabilities of coupled modeling, as this type of a problem could not be analyzed with conventional reservoir simulation tools.
机译：通过循环蒸汽刺激（CSS）加热沥青储层需要高压和高温，这会扰乱土壤基质。这种扰动导致土壤基质膨胀，从而形成渗透率和孔隙率提高的区域，从而影响蒸汽刺激的注入和生产周期以及未与油藏液压连接的多孔区域。体积应变变化远超出注入区域，并且包括膨胀和压缩区域。体积应变的大小可能会导致明显的位移，并且应变会转移到储层外部的多孔区域。这会导致在液压静系统中产生可观察到的压力变化。在为监测含水层压力而钻井的观察井中的压力数据表明，对储层下方约300 m的储层中CSS过程的显着响应。耦合的地质力学模型和储层建模以及分析计算均表明，这种压力行为是由于储层中发生的CSS过程引起的含水层的孔隙弹性响应所致。本文描述了现场数据，耦合储层和地质力学建模的方法以及耦合模型对现场数据的分析结果。分析清楚地表明，含水层的响应不是由与储层的水力连通引起的。它还显示了耦合建模的功能，因为这种类型的问题无法用常规油藏模拟工具进行分析。

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