Feasibility assessment of heavy-oil recovery by CO2 injection after cold production with sands: Lab-to-field scale modeling considering non equilibrium foamy oil behavior
Feasibility assessment of heavy-oil recovery by CO2 injection after cold production with sands: Lab-to-field scale modeling considering non equilibrium foamy oil behavior
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DOI：
10.1016/j.apenergy.2017.08.029
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发表时间：
2017-11-01
期刊：
影响因子：
11.2
通讯作者：
Babadagli, T.
中科院分区：
文献类型：
--
作者：
Shokri, A. Rangriz;Babadagli, T.
考虑到循环注入二氧化碳作为 CHOPS（含砂冷重油生产）FOR 后续方案的潜在用途，进行了全面的岩心到油田规模研究，以研究非平衡二氧化碳行为。 PVT 实验室对 CO2 注入和消耗测试进行测量并在高度控制的条件和不同温度下进行建模，以获得平衡特性。为了解决非平衡过程的动力学问题，设计了一个 1.5 米多压力端口岩心固定器，用于测量 CO2 消耗测试期间砂填充各个部分的压差。每次试验都会记录石油和天然气体积以及沿岩心固定器长度的压力特征。接下来，对 CO2 消耗实验进行数值模拟，并确定用于模拟溶解 CO2 气体释放到捕获的 CO2 气泡，然后释放到游离 CO2 气体（非平衡泡沫油消耗）的反应动力学参数。研究了反应动力学的网格敏感性，并开发了幂律核场缩放规则并进行了数值验证。然后，使用缩放规则来升级阿尔伯塔省先前历史匹配的 CHOPS 油田的反应参数，该油田有 15 个井（Rangriz Shokri 和 Babadagli，2012 年，2014 年）。最后，在不同的油价情景下确定了循环二氧化碳增产作为后续油田规模后CHOPS方案的经济可行性评估，以优化操作条件并选择最佳的油田开发策略。
With notion to the potential use of cyclical CO2 injection as a follow-up post-CHOPS (Cold Heavy Oil Production with Sand) FOR option, a comprehensive core-to-field scale study was performed to investigate the non-equilibrium CO2 behavior. PVT lab measurements of both CO2 injection and depletion tests were performed and modeled under highly controlled conditions and at different temperatures to obtain equilibrium properties. To address the kinetics of the non-equilibrium process, a 1.5-m multiple pressure-port core holder was designed to measure the differential pressure in the various sections of the sand-pack during CO2 depletion tests. Oil and gas volumes and the signature of pressures along the core holder length were recorded at each trial.Next, the CO2 depletion experiments were numerically simulated and the parameters of reaction kinetics used to model the liberation of dissolved CO2 gas to trapped CO2 bubbles and then to free CO2 gas non-equilibrium foamy oil depletion) were determined. The grid sensitivity of the reaction kinetics was investigated and a power law core-to-field scaling rule was developed and numerically validated. The scaling rule was then used to upscale the reaction parameters for a previously history matched CHOPS field with 15 wells in Alberta (Rangriz Shokri and Babadagli, 2012, 2014). Lastly, the economic feasibility assessment of cyclic CO2 stimulation as a follow-up field-scale post-CHOPS option was determined under different oil price scenarios to optimize the operating conditions and the selection of the best possible field development strategies.