中国碳酸盐岩缝洞型油藏提高采收率研究进展

围绕中国碳酸盐岩缝洞型油藏提高采收率难题,阐述缝洞型油藏储集体描述、物理模拟方法、剩余油分布及提高采收率方法4个方面的研究进展,探讨并展望未来缝洞型油藏提高采收率技术的关键与发展方向。缝洞储集体精细描述是提高采收率技术的研究基础,也是实现相似性物理模拟的依据;缝洞型油藏剩余油主要分布在构造高部位和连通屏蔽区,目前提高采收率的方法主要为注气顶替高部位原油,措施较为单一;未来中国碳酸盐岩缝洞型油藏提高采收率研究的发展在于储集体勘探与三维模拟相结合的精细地质描述和实现缝洞型油藏均衡驱替两个方面,等密度流体和流道调整技术是两个潜力研究方向。
Around the key problems of enhanced oil recovery (EOR) for carbonate fractured-vuggy reservoirs in China, this paper summarizes the research progress of four aspects of reservoir description, physical simulation, distribution of residual oil and EOR method, discusses and prospects the development of EOR technology for carbonate fractured-vuggy reservoirs in the future. The fine description of fractured-vuggy reservoir is the research basis of the EOR method, which is also the fundamental of the similarity physical simulation. The residual oil of fractured-vuggy reservoir is mainly distributed in the high part of the reservoir structure and the shielding area of the poor connectivity among fractured-vuggy reservoir structure. Currently the method of EOR is relatively simple, which mainly relies on gas injection to replace the crude oil at high position of reservoir structure. In the future, the development of EOR method for carbonate fractured-vuggy reservoir in China lies in the 2 aspects of the fine geological description, which is combined with reservoir exploration and 3D simulation, and the realization of equilibrium displacement in fractured-vuggy reservoir. The equidensity liquid and channel flow control technology are the two potential research directions