特立尼达和多巴哥（TT）自1908年起商业化生产原油，但近年来原油产量持续下降，主要因为多数油田已超过其生产周期的初级阶段。这一情况叠加能源价格下降，导致TT能源收入减少，面临重大经济挑战。本研究旨在优化一个联合低矿化度聚合物凝胶洪泛的油田模拟模型，以突出增强型石油回收（EOR）技术在提升重油储备和成熟油田原油产量方面的潜力。利用CMG Builder软件构建了EOR 26上森林砂岩储层的EOR模拟模型，研究了聚合物凝胶浓度、盐度浓度和注入速率及压力等最优参数，以实现最高的石油回收率。研究结果显示，在连续聚合物凝胶注入545天期间，使用500ppm的聚合物凝胶浓度、1000ppm的盐度和900桶/天的注入速率，可获得最高的石油回收率。预测该项目的石油回收率额外增加了14.52%的原始油量（OOIP），在原油价格为每桶50美元时，具有经济可行性，回报期为两年，内部收益率为63.53%。
CMG软件应用情况
本研究中使用了CMG STARS软件创建了EOR 26上森林砂岩储层的动态油田模拟模型。该模型考虑了储层岩石属性、流体属性和生产历史，通过调整聚合物凝胶浓度、盐度和注入速率等参数，优化了低矿化度聚合物凝胶洪泛的EOR方案。CMG软件帮助研究人员模拟和评估了不同条件下的储层性能，包括水力行为（例如，井的生产/注入能力）和储层的热演化（例如，热突破时间）。
Abstract
Trinidad and Tobago (TT) have been producing crude oil commercially since 1908. For the past few decades, TT’s crude oil
production has been in steady decline because most of the oil reservoirs are beyond the primary phase of their production.
This situation coupled with lower energy prices have resulted in a shortfall in TT’s energy revenues and presents TT with
major economic challenges. The objective of this study was to optimize a field simulation model of a combined Low Salinity
Polymer Gel flood to highlight the possibility that Enhanced Oil Recovery (EOR) can boost crude oil production especially
from heavy oil reserves and mature fields. A field simulation model of the EOR 26 Upper Forest Sands was built using the
CMG Builder software. The EOR 26 Upper Forest Sand reservoirs of the Forest Reserve field are delineated by shale-outs,
faults and water–oil contacts. The entire Forest Reserve is bordered by the Fyzabad anticline to its north-west and the Los
Bajos fault to its south-west. A dynamic field simulation model of the combined Low Salinity Polymer Gel flooding of EOR
26 Upper Forest Sands was created using CMG STARS software and the optimum parameters of polymer gel concentration,
salinity concentration and injection rates and pressure for the highest oil recovery were investigated. The highest oil recovery
was obtained using a polymer gel concentration of 500 ppm with a salinity of 1000 ppm and an injection rate of 900 bbls/
day during continuous polymer gel injection for a period of 545 days. The polymer gel injection was preceded by pre flush
water injection for 180 days and followed by water injection for the duration of the ten (10) year period. The predicted oil
recovery for the project is an additional 14.52% of OOIP and is considered economically feasible at a crude oil price of
US$50 per barrel with a payback period of two years and an IRR of 63.53%.
作者单位
- 能源系统工程单元，特立尼达和多巴哥大学，Point Lisas，特立尼达和多巴哥
- 能源系统工程单元，特立尼达和多巴哥大学，Point Lisas，特立尼达和多巴哥
- 过程工程单元，特立尼达和多巴哥大学，Point Lisas，特立尼达和多巴哥
