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首页> 外文会议>SPE Asia Pacific improved oil recovery conference (APIORC 01) >A Numerical Study To Evaluate The Use Of WAG As An EOR Method For Oil Production Improvement At B.Kozluca Field, Turkey
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A Numerical Study To Evaluate The Use Of WAG As An EOR Method For Oil Production Improvement At B.Kozluca Field, Turkey

机译：评估Wag作为EOR方法改善土耳其B.Kozluca油田采油量的数值研究

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B.Kozluca Field with an OOIP of 138 MMSTB has beenrnproducing for more than 16 years. Main producing formationrnis the carbonate Alt Sinan. Oil gravity is 12.6 0API with a veryrnhigh viscosity of 500 cp at reservoir conditions. Productionrnmechanism is rock and fluid expansion with a very weakrnbottom water drive. By the year 2001, the cumulative oil andrnwater production are 3,836,551 stb and 539,059 stbrnrespectively and daily oil production is 570 stb/day with 20 %rnWC.rnIn 2000, in order to increase the oil recovery, a re-evaluationrnand reservoir management study was started. This study wasrninitialized by screening the applicable EOR methods. Sincernthere is a CO2 reservoir at Camurlu Field, which is about 10rnkm from the B.Kozluca field, study was focused on the CO2rninjection. Then, a full field simulation and reservoirrncharacterization study was performed. Firstly, a numericalrnmodel was used to predict the oil production by currentrnproduction scenario and then this model was used to make arnsensitivity study to determine a certain CO2 injection pattern,rnnumber of the injection wells and the optimum injection rate.rnAlthough the initial predictions for different immiscible CO2rninjection scenarios give very limited incremental oil due to thernvery adverse mobility ratio between oil and CO2, thisrnapplication accelerates the oil production. Then, manyrndifferent Water Alternating Gas (WAG) scenarios werernstudied and the results showed that WAG will be better thanrnonly CO2 injection. In order to find the optimum injectionrnperiod many scenarios were studied and 60 days of CO2rninjection followed by 30 days of water injection scenario wasrnchosen as the best case. Meanwhile, a parallel study wasrninitiated for the design of the surface facilities and well headsrnfor injection wells of B.Kozluca field, a processing facility forrnCO2 and produced water at B.Kozluca field and CO2rnproduction and treatment facilities at Camurlu field.rnAt the end of the integrated reservoir management study, byrnapplying the WAG technique as an EOR method, it wasrnpredicted that more than 7 MMSTB incremental oil will bernproduced with $ 4.25 MM capital investment for surfacernfacilities, additional perforations, pipe line construction andrnconversion of production wells to injection wells. With thisrninvestment, more than $ 20 MM profit will be gained. Pipelinernconstruction between Camurlu and B.Kozluca field has beenrnalready started and Camurlu field surface facilities werernevaluated and was found to be sufficient for CO2 productionrnand treatment. Other surface facility constructions are beingrnplanned for the coming months.
机译：具有138 MMSTB的OOIP的B.Kozluca油田已经生产了16年以上。主要生产地层碳酸盐碳酸盐Alt Sinan。油层重力为12.6 0API，在储层条件下的粘度非常高，为500 cp。生产机制是岩石和流体的膨胀，底部的水驱力很弱。到2001年，累计产油量和产水量分别为3,836,551 stb和539,059 stbrn，日产油量为570 stb / day，WC为20％。在2000年，为了提高采油率，开始了重新评估和储层管理研究。通过筛选适用的EOR方法对本研究进行了初始化。由于在距B.Kozluca油田约10rnkm的Camurlu油田有一个二氧化碳气藏，因此研究重点是二氧化碳注入。然后，进行了全油田模拟和储层表征研究。首先，使用数值模型预测当前产量情况下的石油产量，然后使用该模型进行敏感性研究，以确定特定的CO2注入方式，注入井数和最佳注入速率。由于石油和二氧化碳之间的不利迁移率之比极高，因此注入二氧化碳的情景只能提供非常有限的增量石油，这种应用加速了石油的生产。然后，研究了许多不同的水交替气（WAG）方案，结果表明，WAG优于仅注入CO2。为了找到最佳的注入期，对许多方案进行了研究，并选择了60天的CO2注入，然后选择30天的注水方案作为最佳方案。同时，开始进行平行研究，以设计B.Kozluca油田的注水井的地面设施和井口，这是B.Kozluca油田的CO2和采出水的处理设施以及Camurlu油田的CO2生产和处理设施。通过将WAG技术用作EOR方法，进行了综合油藏管理研究，预测将以4.25 MM的资本投资生产7个以上MMSTB增量油，用于地表设施，附加射孔，管道建设以及生产井向注入井的转换。通过这项投资，将获得超过20 MM的利润。 Camurlu和B.Kozluca田间的管道建设已经开始，对Camurlu田间的地面设施进行了重新评估，发现足以进行CO2的生产和处理。其他地面设施的建设计划在未来几个月内进行。

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