Techno-Economic Analysis of Hydraulic Fracturing As A Solution for Developing Low-Resistivity and Low-Quality Zone on Offshore “RI” Field

S. Chandra, Ilma Mauldhya Herwandi
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Abstract

Hydrocarbon production in Indonesia is continuously decreasing on a yearly basis, which is in contrast with its increasing level of consumption. Low-quality and low-resistivity reservoir zones are deemed to possess a lot of hydrocarbon potentials, however, little priority has been placed on their development due to their small level of production. The "RI" field that was utilized in this study is a mature offshore field with a reservoir which has a low-quality and low-resistivity zone. This area has been in use for more than thirty years, therefore its rate of oil production has declined. This study aims to review the techno-economic aspects of well stimulation in the form of hydraulic fracturing. And also, to determine the development method that is suitable for low-quality fields. The hydraulic fracturing process was modelled using Fracpro software as input parameters for the reservoir production simulations. The reservoir behavior was simulated using the CMG software to observe the amount of hydrocarbon liable for production in various development scenarios. Three cases were performed on the "RI" field, which was stimulated for ten years of operation. The first case was the instance with the natural flow, while the second implemented hydraulic fracturing at the beginning of production, and the third was the implementation of hydraulic fracturing, which started in the middle of the production period. Then, the three cases are evaluated utilizing a Gross Split scheme, to calculate the economics of the project both from the government and contractor's aspects. The simulation study concluded that fracturing at the beginning of the LRLC zone development is the most profitable. The novelty of this study is the comparison of scenarios for the implementation of hydraulic fracturing methods in fields with low-resistivity and low-quality zone whose economic value is evaluated by the Gross Split scheme.
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水力压裂解决海上“RI”油田低电阻率低质量区的技术经济分析
印度尼西亚的碳氢化合物产量每年都在持续下降,这与它不断增长的消费水平形成鲜明对比。低质量、低电阻率储层被认为具有很大的油气潜力,但由于其生产水平低,没有得到优先开发。本研究利用的“RI”油田是一个成熟的海上油田,其储层具有低质量和低电阻率带。这个地区已经使用了三十多年,因此石油产量下降了。本研究旨在回顾以水力压裂的形式进行油井增产的技术经济方面。同时,确定适合低质量油田的开发方法。水力压裂过程建模使用Fracpro软件作为油藏生产模拟的输入参数。利用CMG软件对储层行为进行了模拟,观察了不同开发方案下的可产烃量。在“RI”油田进行了3例,该油田已进行了10年的增产作业。第一个是自然流动的情况,第二个是在生产初期实施水力压裂,第三个是在生产中期开始实施水力压裂。然后,利用Gross Split方案对这三个案例进行评估,从政府和承包商的角度计算项目的经济效益。模拟研究表明,在LRLC层开发初期进行压裂是最有利的。本研究的新颖之处在于通过Gross Split方案对低电阻率低质量地层的水力压裂方法实施方案进行了比较,并对其经济价值进行了评价。
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审稿时长
8 weeks
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