油页岩原位开采数值模拟研究进展

Research progress of numerical simulation on oil shale in-situ production

油页岩是一种储量丰富的非常规能源,以电加热和流体加热为主的油页岩原位开采技术正逐渐成为该领域的研究重点。为了深入研究油页岩原位开采过程中涉及到的流体与地层间热传递、有机质热解化学反应、储层孔渗变化、油气渗流等多个物理化学过程之间的耦合,对原位开采过程进行系统数值模拟,有利于揭示原位开采机理、优化原位开采设计方案、评价原位开采经济效益。通过对油页岩原位开采数值模拟的国内外研究进展和研究现状进行了总结,分析了数值模拟研究的核心问题、面临的主要挑战、取得的进展以及当前亟需解决的瓶颈问题。研究结果表明:原位开采条件下的动力学参数对于开展准确的数值模拟研究至关重要,流体加热由于其过程复杂,现有模型有待完善。对于未来开展油页岩原位开采相关技术研究,尤其是数值模拟研究具有一定的指导和借鉴意义。

Oil shale is an unconventional energy with rich reserves.The in-situ production technology for oil shale dominated by electric heating and fluid heating is becoming the research emphasis in this field.The in-situ production process for oil shale involves the coupling of many physical and chemical processes such as heat transfer between fluid and formation,pyrolytic and chemical reaction of organic material,porosity and permeability change of the reservoir,oil and gas seepage and etc.Systematic numerical simulation for the in-situ production process is beneficial to the disclosure of in-situ production mechanism,optimization of in-situ production design scheme and economic effect evaluation of in-situ production.Summarized domestic and international research progress and status of numerical simulation on oil shale in-situ production,and analyzed core problems,main challenges,obtained progresses and bottleneck problems which should be solved eagerly in the numerical simulation research.It provides guidance and reference for the technical research related to oil shale in-situ production in the future,especially numerical simulation research.