摘要
为探讨沉积微相与水驱倍数及剩余油之间的关系,以双河油田V下油组为例,利用数值模拟方法,建立水驱倍数机理模型,得到研究区水驱倍数在平面上的量化表征及剩余油的分布特征,通过分析水驱倍数与含水饱和度之间的关系,明确研究区水驱倍数的拐点值和极限值。研究结果表明:V下油组发育的扇三角洲前缘中以水下分流河道砂体物性最好,河口坝、前缘席状砂次之,水下溢岸砂体物性最差;沉积微相控制着储层的物性,物性差异控制着注入水在平面上的运动方式,进而影响着水驱倍数的高低。结合沉积微相、水驱倍数和剩余油分布特征,可定量说明沉积微相控制着储层的物性,影响着油水的运动关系,控制着水驱倍数的大小,进而决定着剩余油的富集。阐明沉积微相与水驱倍数及剩余油之间的关系,对于高含水期油田找准剩余油富集区、后期开发调整、部署注采井网及高效挖潜剩余油具有重要参考。
In order to discuss the relationship between sedimentary microfacies and water flooding pore volume times as well as remaining oil,taking the lower V oil layers in Shuanghe Oilfiled as an example,the mechanism model of water flooding pore volume times is established using numerical simulation method,and the plane quantitative characterization of waterflooding pore volume times and remaining oil distribution are obtained. The inflection point value and the limit value of water flooding pore volume times are determined by analyzing the relationship between water flooding pore volume times and water saturation. The research result shows that,the physical property of the underwater distributary channel sand-bodies developed in the lower V oil layers is the best,that of distributary mouth bar and frontal sheet sand-bodies is secondary,and that of underwater overbank sand-bodies is the worst. Sedimentary microfacies controls the physical property of reservoirs,the difference in the physical property of reservoirs controls the movement of injected water in the plane,the movement of injected water controls water flooding pore volume times,and thereby water flooding pore volume times controls remaining oil distribution,which can be quantitatively illustrated by the combination of the sedimentary microfacies distribution,water flooding pore volume times distribution and remaining oil distribution. The relationship between sedimentary microfacies and water flooding pore volume times as well as remaining oil is important to finding remaining oil enrichment zones and the adjustment of development plan and well pattern to develop the remaining oil in the late period of oilfield development.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2015年第3期53-58,9,共6页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家重点基础研究发展规划“973”项目“中国西部叠合盆地深部有效碎屑岩储层成因机制与发育模式”(编号:2011CB201104)
甘肃省重点实验室专项(编号:1309RTSA041)资助
关键词
沉积微相
水驱倍数
剩余油
水驱开发效果
双河油田
sedimentary microfacies
waterflooding pore volume times
remaining oil
waterflooding development effect
Shuanghe oilfield
