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Investigation of Feasible Strategies for CO2 EOR Flooding of the Ogallah Field in Central Kansas

机译：堪萨斯州中部Ogallah油田CO2 EOR驱的可行策略研究

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摘要

A large number of producing fields in Kansas are entering the mature stage for primary and/or secondary depletion with declining oil rates and increasing water cut and GOR trend, The Ogallah field is considered as it is one of the oldest fields with bottom water drive in central Kansas; producing from the Arbuckle and other formations. The Arbuckle formation accounts for approximately 36% of Kansas Oil production. And there is still more that this formation can produce. There is a need to consider the improved oil recovery techniques.;CO2 injection is an effective technique for improved oil recovery in light oil reservoirs. This study investigates the feasibility of various CO2 injection modes in the Ogallah field. It also deals with the economic optimization studies for selecting the best mode of CO2 injection. Lease-4 in the field is selected as the target lease; with two wells in that lease for injecting CO2.;A PVT fluid model, in which the Peng-Robinson Equation of State is tuned to match the experimental results of swelling test, saturation pressure, density, and viscosity is used to represent the reservoir fluid properties. Using a compositional simulator, four injection techniques: 1) continuous CO 2 flooding, 2) water alternating gas (WAG), 3) hybrid WAG, and 4) CO 2 Huff and Puff were simulated to evaluate potential CO2 injection modes. The Optimum injection modes for this case study reservoir were established. Huff and Puff injection with a CO2 injection rate of 400 MSCF/day and an injection period of one month, soaking period of two months, and production period of three months was the most efficient recovery method. It yields the highest recovery factor of 56% OOIP including primary recovery with an average injection pressure not exceeding the 2000 psi, and a maximum NPV of 13 million dollars.
机译：堪萨斯州的许多生产油田正进入一次和/或二次枯竭的成熟阶段，石油价格不断下降，含水率和GOR趋势不断增加，奥加拉油田被认为是该州最古老的底水驱动油田之一。堪萨斯州中部；由Arbuckle和其他编队生产。 Arbuckle地层约占堪萨斯州石油产量的36％。而且，这种地层还会产生更多的东西。需要考虑改进的采油技术。CO 2注入是用于改善轻质油藏中的采油率的有效技术。这项研究调查了在Ogallah油田采用各种CO2注入方式的可行性。它还涉及选择最佳二氧化碳注入方式的经济优化研究。选择该字段中的Lease-4作为目标租约；在该租约中有两个井用于注入CO2。PVT流体模型，其中对Peng-Robinson状态方程进行了调整以匹配溶胀测试，饱和压力，密度和粘度的实验结果，以表示储层流体属性。使用成分模拟器，可以使用四种注入技术：1）连续注入CO 2，2）水交替气（WAG），3）混合WAG和4）CO 2 Huff和Puff以评估潜在的CO2注入方式。建立了该案例研究油藏的最佳注入模式。最有效的回收方法是二氧化碳喷射速率为400 MSCF /天，喷射期为1个月，浸泡期为2个月，生产期为3个月的霍夫和帕夫注射。它具有最高的回收率，达到OOIP的56％，包括一次采油，平均注入压力不超过2000 psi，最大NPV为1300万美元。

著录项

  • 作者

    Palakaluri, Kavya.;

  • 作者单位

    University of Kansas.;

  • 授予单位 University of Kansas.;
  • 学科 Petroleum engineering.
  • 学位 M.S.
  • 年度 2018
  • 页码 136 p.
  • 总页数 136
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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