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首页> 外文会议>SPE Improved Oil Recovery Conference >Economic Assessment of Strategies for CO2-EOR and Storage in BrownfieldResidual Oil Zones:A Case Study from the Seminole San Andres Unit
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Economic Assessment of Strategies for CO2-EOR and Storage in BrownfieldResidual Oil Zones:A Case Study from the Seminole San Andres Unit

机译：BrownfieldResidual油区CO2-EOR策略的经济评估：Seminole San Andres单位的案例研究

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Brownfield residual oil zones(ROZ)may benefit from specific strategies to maximize production.Weevaluated several strategies for producing from the Seminole ROZ.This ROZ lies below the main pay zone(MPZ)of the field.Such brownfield ROZs occur in the Permian Basin and elsewhere,formed by the actionof regional aquifers over geologic time.CO2 can be injected into these zones to enhance oil recovery andcarbon storage.Since brownfield ROZs are hydraulically connected to the MPZs,development sequencesand schemes should influence oil production,CO2 storage,and net present value(NPV).We conducted economic assessments of various CO2 injection/production schemes in the Seminolestacked ROZ-MPZ reservoir based on flow simulations.First,we constructed a high-resolution geocellularmodel from a seismic survey,wireline logs and core data.To calibrate the geological model and constrainthe interface between the ROZ and the MPZ,we performed a comprehensive production-pressure historymatching of primary depletion and secondary waterflooding.After this,we conducted flow simulations ofwater alternating gas(WAG)injection into the reservoir while considering several injection/productionsschemes(e.g.,switching injection from the MPZ to the ROZ,commingled production).For each scheme,various WAG ratios(i.e.,reservoir volume ratio between injected water and CO2)were tested to find themaximum oil production and maximum CO2 storage.We assessed the economic results for each WAG ratiocase on NPV.The results from simulating various injection/production schemes showed that simultaneous CO2injection into the MPZ and ROZ favors oil production.If instead,CO2 is injected into the MPZ and ROZ,then into the ROZ alone,this leads to increased CO2 storage.Storage performance is influenced by theinterplay between the crossflow from the MPZ to ROZ and WAG ratios.As the WAG ratio increases,theamount of CO2 stored decreases more for commingled injection cases than for separated ROZ injectioncases.Also,the WAG ratio leading to maximum oil production does not necessarily yield the largest NPV,because of the complicated interactions among CO2 consumption,reservoir heterogeneity,and oil recovery.Brownfield ROZs are common below San Andres reservoirs in the Permian Basin,and they can beexploited to increase oilfields'NPV and carbon storage potential.Our case study on the Seminole MPZ-ROZ is an analog for other similar reservoirs.We demonstrate that development sequences and WAG ratios influence the performance of CO2 EOR and storage.Thus,this work provides valuable insights into thefurther optimization of brownfield ROZ development and helps operators to plan flexible storage goals forstacked ROZ-MPZ reservoirs.
机译：布朗菲尔德剩余油区（ROZ）可能受益于最大化生产的特定策略。随着Seminole Roz的几种策略。这是Roz的校长位于Field.such Brownfield Rozs的主要工资区（MPz）。在其他地方，由区域含水层通过地质时间的作用形成。可以将这些区域注射到这些区域中以增强油回收和碳储存。棕色菲尔德Rozs液压连接到MPZs，显影序列和方案应影响石油生产，二氧化碳储存和净存在价值（NPV）。我们基于流动模拟对Seminestacked Roz-MPZ水库中的各种二氧化碳注射/生产计划进行了经济评估。首先，我们构建了一种从地震测量，有线日志和核心数据的高分辨率地形细胞模型。校准ROZ和MPZ之间的地质模型和约束界面，我们执行了初级D的综合生产压力历史验证epletion和次要水上的。在这方面，我们在考虑几种喷射/制作店（例如，从MPZ切换到ROZ，混合的生产）时，我们对水中的交替气体（摇摆）喷射到储层中的流量模拟。对于每个方案，各种卷曲测试比率（即注射水和CO2之间的储层体积比），以找到最大的油生产和最大二氧化碳储存。我们评估了NPV上每个摇率的经济结果。模拟各种喷射/生产方案的结果表明同时同时的CO 2注射进入MPZ和ROZ源于石油生产。如果代替，CO2被注射到MPZ和ROZ中，然后单独进入ROZ，这导致CO2存储增加.Storage性能受到来自MPZ的横向流程之间的横向的影响。比率。摇摆比增加，CO2储存量的储存量比分离的ROZ注入酶更低减少更多，因为它们是对分离的ROZ注入酶。ASO，WAG RA导致最大的石油产量不一定会产生最大的NPV，因为二氧化碳消费，水库异质性和石油恢复之间的复杂相互作用.Brownfield Rozs在二叠纪盆地的圣安德里斯水库下面是常见的，他们可以避免增加油田'NPV和碳储存潜力。对Seminole MPZ-Roz的案例研究是其他类似水库的模拟。我们表明，发育序列和摇摆比率影响CO2 EOR和储存的性能。本作，这项工作为熟练提供了宝贵的见解棕色菲尔德ROZ开发的优化，帮助运营商规划柔性存储目标，用于攻击ROZ-MPZ水库。

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