首页> 外文会议>SPE Canada Heavy Oil Technical Conference >Development of a Non-Equilibrium Pore Scale Reservoir Simulator
【24h】

Development of a Non-Equilibrium Pore Scale Reservoir Simulator

机译:非平衡孔隙率储层模拟器的开发

获取原文

摘要

Solvent injection alone, or in combination with steam, is currently receiving considerable attention as an emerging in-situ oil sands technology in Alberta. The goal of solvent and steam assisted recovery processes is to reduce energy consumption and greenhouse gas emissions over the use of steam alone. Pilot studies in the field indicate a significant difference between reservoir simulation predictions, and field performance and previous studies have demonstrated that the assumption of instantaneous equilibrium is not valid for solvent-bitumen interactions and can introduce significant inaccuracies to the modelling results. In addition to assuming non-equilibrium, this study seeks to determine the mechanism of solvent dissolution in bitumen and the expected improvement in oil recovery, if any, when a solvent is injected with steam. The unique aspect of this work is that instantaneous phase equilibrium is not assumed, as is typical of numerical simulations for solvent-steam applications. Partial equilibrium was not based on an empirical factor or concept. Rather, this study bases phase equilibrium on an analytical model of the dissolution and mobilization of a drop of bitumen inside a pore, by solvent and heat. The analytical solution indicates that the time required for a drop of bitumen to mobilize towards the production well is at least three times greater for solvent via diffusion and dispersion than by heat conduction. The analytical solution was developed for solvent injection, heat injection, and co-injection for several boundary conditions. The single drop model is built into a new thermal compositional simulator developed for this study. Thermal solvent injection processes were investigated for non-equilibrium phase behaviour. The results were compared with the case of instantaneous equilibrium, showing the reason for the previous lack of accurate predictions for solvent injection in oil sands reservoirs. The results and extensions of this work will be of interest in heavy oil production because they serve to explain the unexpected performance and frequent lack of success of these processes. This model is capable of precisely predicting solvent injection concentration, flow rate, and recovery at the field scale, making it possible to determine whether or not solvent injection is appropriate in any given situation.
机译:单独溶剂注射或与蒸汽结合使用,目前正在接受广泛的艾伯塔省出现的原位油砂技术。溶剂和蒸汽辅助恢复过程的目标是降低单独使用蒸汽的能量消耗和温室气体排放。该领域的试验研究表明储层模拟预测之间的显着差异,现场性能和先前的研究表明,瞬时平衡的假设对于溶剂 - 沥青相互作用无效,并且可以对建模结果引入显着的不准确性。除了假设非平衡之外,该研究还试图确定沥青中溶剂溶解的机制,如果用蒸汽注射溶剂,则溶剂的预期改善(如果有的话)。这项工作的独特方面是溶剂 - 蒸汽应用的典型数值模拟的典型数值,是瞬时相平衡的。部分均衡不是基于经验因素或概念。相反,该研究基于溶解和动员孔隙内溶解的分析模型的相平衡,通过溶剂和热量。分析溶液表明,通过扩散和分散的溶剂通过扩散和分散,沥青朝向生产井的沥青朝向生产井所需的时间比通过导热和分散效果更大。为溶剂注射,热注射和若干边界条件共注射而开发了分析溶液。单滴模型内置于为本研究开发的新型热成分模拟器中。研究了热溶剂注射过程以进行非平衡相行为。将结果与瞬时平衡的情况进行比较,呈现出对油砂储层溶剂注入溶剂注射准确预测的原因。这项工作的结果和延伸将涉及重油生产,因为它们有助于解释这些过程的意外表现和频繁缺乏成功。该模型能够精确地预测溶剂注入浓度,流速和在现场规模的恢复,使得可以确定溶剂注射是否适合任何特定情况。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号