红浅一井区稠油油藏火驱开采适应性分析

Analysis on Adaptability of Production by In-Situ Combustion Process in Heavy Oil Reservoir in Well Block Hongqian-1, Karamay Oilfield

火驱开采法是提高石油采收率的方法之一,也是油田开采中、后期转换的重要开发方式.室内实验已经证明,已燃烧区的残余油饱和度几乎为零,采收率可达85％～90％.在已实施的矿场火烧油层方案中,采收率亦可达到50％～80％.针对克拉玛依油田稠油油藏的地质特征及开发现状,探讨了该技术在红山嘴油田红浅一井区稠油油藏的试验效果.综合评价认为,该技术适合稠油油藏蒸汽吞吐后的稠油开发.

In-situ combustion, a kind of thermal production technology for generating heat within an oil zone, is also called fire flooding process. It is not only a method used to improve oil recovery factor, but also an effective approach to convert production methods in middle to late stages of oil field development. Laboratory experiments have proved that, the residual oil saturation in the combusted zones is almost zero, while the recovery factor can be as high as 85%-90%. In the implemented in-situ combustion projects on the field, the recovery factor can also be as high as 50%-80%. Based on the geologic characteristics and current development status of the heavy oil reservoirs in Karamay oilfield, this paper makes probe into the test effect of the technology applied in the heavy oil reservoir in Wellblock Hongqian- 1 in Hongshanzui oilfield. On the basis of comprehensive evaluation, this technology is believed to be adaptable to development of heavy oils for EOR during late stage of cyclic steam stimulation.