河流相稠油油田合理注水时机实验研究

发布时间：2018-07-01 17:11

本文选题：注水时机 + 采收率　；参考：《特种油气藏》2017年05期

【摘要】：针对河流相稠油油藏衰竭开发转注水开发注水时机难以确定的问题,以渤海秦皇岛32-6油田油藏参数为基础,通过物理模拟的手段寻求最佳注水时机。首先确定油田各区块的最佳衰竭压力,然后在原始地层压力和最佳衰竭压力之间选取5个压力点进行注水时机模拟实验,同时开展注水过程中是否需要恢复压力至原始地层压力的对比实验。结果表明:各区块最佳衰竭压力为饱和压力的90%~96%,且原油黏度越大,最佳衰竭压力越接近饱和压力;注水时机选择在最佳衰竭压力时,可获得较高的无水采油期和采收率,且累计注水量最少;注水恢复压力至原始地层压力开发并不能提高开发效果,反而耗水量增多。因此,河流相稠油油田合理注水时机推荐最佳衰竭压力附近,能有效利用天然能量,获得较高的采收率,且可减小注水量,降低生产成本。该结论和认识在数值模拟中也得到了验证,对同类油藏的开发具有指导和借鉴意义。
[Abstract]:In view of the difficulty of determining the timing of water injection in fluvial heavy oil reservoir, the best water injection time is found by physical simulation based on reservoir parameters of Qinhuangdao 32-6 oilfield in Bohai Sea. First, determine the best failure pressure in each block of the oilfield, then select 5 pressure points between the original formation pressure and the best failure pressure to simulate the water injection time. At the same time, the correlation experiment of whether the recovery pressure to the original formation pressure is needed in the process of water injection is carried out. The results show that the optimum failure pressure of each block is 90 / 96 of saturation pressure, and the higher the viscosity of crude oil is, the closer the optimum failure pressure is to saturation pressure, and the higher the water-free oil recovery period and recovery are when the optimal failure pressure is selected for water injection. The accumulative water injection is the least, and the recovery pressure of water injection to the original formation pressure development can not improve the development effect, on the contrary, the water consumption increases. Therefore, the reasonable water injection time in fluvial heavy oil field recommends the best failure pressure nearby, which can effectively utilize natural energy, obtain higher recovery factor, reduce water injection rate and reduce production cost. The conclusion and understanding are also verified in the numerical simulation, which is instructive and referential to the development of similar reservoirs.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)
【分类号】：TE357.6

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