Nearly abandoned heavy oil reservoirs present significant challenges for effective reserve utilization using conventional development methods.In-situ combustion technology emerges as a promising solution to enhance recovery from such reservoirs,although its widespread adoption is hindered by high investment costs and economic inefficiencies.This study employs a break-even model and sensitivity analysis within a volume-cost-benefit framework to explore the equilibrium between oil production costs and revenues under varying oil price scenarios from a multidimensional operational perspective.This approach clarifies the critical economic indices of fire-flooding operations and aims to optimize production operations and decision-making effectiveness.The findings reveal significant gaps in pre-and post-operation understanding of the reservoir,where inputs often surpass outputs,coupled with a lack of clear control strategies.These factors contribute to the low cost-effectiveness of in-situ combustion and insufficient grasp of sustained development and operational risks,ultimately impacting investment decisions in reservoir development.The study not only directs improvements in operational efficiency for in-situ combustion but also offers technical support and introduces new management strategies for the effective development of nearly abandoned heavy oil reservoirs.
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