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Assessment of Thermal Recovery: Steam Assisted Gravity Drainage (SAGD) to Improve Recovery Efficiency in the Heavy-Oil Fields of the Peruvian Jungle

机译:热回收评估:蒸汽辅助重力排水(SAGD),以提高秘鲁丛林重油场中的恢复效率

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The decline of medium and light oil production of most of the fields in Peru in the last years, the increase of the domestic demand, the rising of oil prices and the recent discoveries of large heavy oil resources in the Maranon Basin, makes the suitable scenario to economically develop such heavy oil reservoirs. The technical recoverable volumes estimated for heavy oil fields in Peru (with API degree of 12 or even less) represent a significant energy resource for the country. Reasons for applying SAGD process to improve recovery factor in these fields. Cold production technologies in heavy oil fields with API degree of 12 or even less, yielded low recovery factors (no more than 15%). The fluid property that most affects the productivity and recovery of heavy crude oil is viscosity; therefore, it is expected that thermal process like SAGD would increase the recovery efficiency of heavy oil fields by adding heat. An screening criteria matrix was prepared based on worldwide analogous projects, which includes the fluid and rock properties to apply in Heavy Oil Fields of the Peruvian Jungle; then, a conceptual local-grid refined simulation model was built to evaluate production performance and estimate a recovery factor for the zone. The SAGD process was compared in performance to conventional cold production methods of the region (deviated and horizontal wells with ESP pumps). As a result, a matrix with recovery factors of SAGD process is provided; which with an average recovery factor of 25% looks very promising for a feasibility study. With the success of SAGD process in analogous heavy oil fields around the world, this study aims to bridge the gap that Peru has in Thermal Recovery and EOR processes, with Screening matrix and Reservoir Simulation of SAGD process to apply a pilot program, increasing the national production.
机译:在过去几年中,秘鲁大部分田地的中型和轻质油产量下降,增加了国内需求,油价上涨和最近在马拉松盆地的大量大石油资源发现,使得适当的情景在经济上发展这种重油储层。秘鲁重油田(API)估计的技术可收回体积(具有12甚至更少的API)代表了该国的重要能源资源。应用SAGD进程的原因,提高这些领域的恢复因子。高油田的冷轧生产技术,API为12甚至更低,产生的恢复因子低(不超过15%)。最大影响重原油生产力和恢复的流体性能是粘度;因此,预计像SAGD这样的热过程将通过添加热量增加重油田的恢复效率。基于全球类似的项目制备筛选标准矩阵,其包括普通油田的流体和岩石特性;然后,建立了一个概念本地 - 网格精制仿真模型,以评估生产性能并估算区域的恢复因子。将SAGD过程与该区域的常规冷轧生产方法进行比较(偏离和eSP泵的水平孔)。结果,提供了具有SAGD过程的恢复因素的矩阵;平均回收率为25%看起来非常有希望进行可行性研究。随着SAGD过程的成功在世界各地的重型油田中,本研究旨在弥合秘鲁在热回收和EOR流程中的差距,筛选矩阵和储层仿真SAGD过程施加试点计划,增加了国家生产。

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