Advance and Future Development of ISC for Heavy Oil and Oil Sand Development
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摘要: 重油、油砂原位燃烧技术具有成本低、热能利用率高和采收率高等优点,是目前重油和油砂开发的研究热点。在技术调研的基础上,对常规原位燃烧技术的燃烧机理、燃烧类型和技术特点进行了总结分析,并详细介绍了水驱正向燃烧法、水平井火烧油层法、顶部燃烧重力驱油法、燃烧辅助重力驱油法和氧添加蒸汽辅助重力驱油法等最新原位燃烧技术的驱油原理、井网几何结构、适用性、优缺点和工程难点。研究认为,目前原位燃烧技术的创新研究主要集中于井网几何结构创新和与其他工程及增产措施融合,一方面避开了传统原位燃烧技术的难点,有利于该技术的快速发展和现场应用;另一方面可以融合注蒸汽法和原位燃烧法的技术特点,改善驱油效果,提高重油、油砂油藏采收率,早日实现效益产出。原位燃烧技术的创新发展对我国正在起步的重油、油砂资源开采具有一定的指导作用,为我国原位燃烧后续技术储备及创新提供了借鉴。Abstract: In situ combutiom (ISC) technology of heavy oil and oil sand reservoirs presents low cost, high utilization rate of thermal energy and high recovery rate. currently,it is deemed a technical research hotspot in heavy oil and oil sands development. Based on technical investigations, combustion principles and types, technical characteristics of conventional ISC were summarized and analyzed in this paper. The latest research on ISC, oil displacement principles of ISC, well patterns, applicability, advantages and disadvantages of the technology, and engineering difficulties were introduced in detail. These technologies include COFCAW, THAI, COGD, CAGD, and SAGDOX. The studies suggested that the innovation research of ISC technology mainly focused on well pattern and integration with other projects and well stimulation measures. As a result, it had no such technical difficulties as in traditional ISC, which promoted its rapid development and field application. On the other hand, it could integrate the technical characteristics of steam injection method and in-situ combustion method to improve oil displacement effects and heavy oil and oil sands reservoir recovery efficiency. The innovation and development of ISC technology would provide guidance in the exploitation of heavy oil in oil sands in China and also provide technical references for the subsequent technology reserve and innovation of ISC.
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Keywords:
- heavy oil /
- oil sand /
- in situ combustion
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