孔洞型碳酸盐岩油藏不同开发方式物理模拟研究

发布时间：2018-03-28 15:37

本文选题：孔洞型碳酸盐岩　切入点：长岩心驱替　出处：《断块油气田》2016年01期

【摘要】：对于孔洞型碳酸盐岩储层,由于其特殊的孔洞结构特征,一般情况下很难使用其真实岩心开展长岩心驱替实验。在不影响原有岩心孔渗结构的基础上,对岩心表面凹陷处进行特殊填补处理,以达到长岩心实验要求。文中在油藏实际条件下,开展长岩心衰竭开采实验,水驱、气驱开发实验和气水交替驱实验,统计分析不同开发方式下各阶段的驱油效率,对比评价不同开发方式的开发效果。结果表明:衰竭开采最终采收率高达30.94%;水驱开发中,适当延迟转注时间能够充分发挥弹性驱油和溶解气驱油作用,提高最终采收率,并确定最佳转注压力为80%泡点压力;气驱开发中,气体突破速度快,突破后产油量急剧下降,采收率较低;气水交替驱能有效降低含水率,提升高含水期原油采收率,在高压高含水阶段转气水交替的开发效果更为显著。该实验为合理开发孔洞型碳酸盐岩油藏提供了基础数据和技术支撑。
[Abstract]:For porous carbonate reservoir, because of its special pore and hole structure, it is difficult to carry out long core displacement experiment with its real core under general circumstances, on the basis of not affecting the original core pore and permeability structure, it is difficult to carry out long core displacement experiment with its real core. In order to meet the requirements of long core experiment, the experiments of long core failure recovery, water drive, gas drive development and alternating gas water drive are carried out in this paper. The oil displacement efficiency of different development modes is analyzed statistically, and the development effect of different development modes is compared and evaluated. The results show that the final recovery factor of failure recovery is as high as 30.944.In water drive development, The proper delayed injection time can give full play to the effects of elastic flooding and dissolved gas flooding, improve the final oil recovery, and determine the optimal injection pressure is 80% bubble point pressure, and in gas drive development, the gas breakthrough speed is fast, and the oil production after breakthrough decreases sharply. The oil recovery is low, the alternating displacement of gas and water can effectively reduce the water cut, and enhance the oil recovery in high water cut period. This experiment provides basic data and technical support for the rational development of porous carbonate reservoirs.
【作者单位】：中国石油大学(北京)石油工程学院;西安石油大学石油工程学院;中国石油长庆油田公司第六采油厂;中国石油华北油田公司勘探开发研究院;
【基金】：国家“十二五”重大科技专项课题“孔隙型灰岩油藏提高采收率方法研究及优化”(2011ZX25001-002) 中国石油勘探开发研究院创新项目“孔洞型碳酸盐岩油藏渗流机理物理模拟研究”(2012Y-055)
【分类号】：TE344

【相似文献】