辽河西部凹陷欢喜岭地区扇三角洲前缘储层非均质性表征

发布时间：2018-05-12 03:13

本文选题：辽河西部凹陷 + 蒸汽驱试验区　；参考：《地质科技情报》2017年01期

【摘要】：研究区位于辽河油田某蒸汽驱试验区内。以该地区于楼油层扇三角洲前缘砂体为研究对象,综合400口井测井资料、6口取心井资料及多种测试资料,对该地区储层非均质性进行了定性及定量的精细表征,分析了非均质性的主控因素及分布规律,探讨了非均质性对储层开发的影响,并提出了相应的开发调整建议。结果表明,研究区夹层发育泥质夹层、物性夹层及成岩胶结夹层,夹层频率介于0.052~0.17层/m;隔层发育泥质隔层,平均厚度为1.52~3.84m;主力油层单层平均渗透率变异系数介于0.59~1.01之间,平均渗透率级差介于55.51~462.42之间,平均突进系数介于2.37~3.75之间,整体属于中-强非均质性储层;砂体类型包括水下分流河道、河口砂坝、水下分流河道间砂、水下分流河道间泥及前缘席状砂,垂向叠置模式包括连通型、弱连通型及不连通型,平面分布模式包括连片状及条带状。非均质性整体受控于沉积环境与沉积动力作用的演化过程,如发育于可容纳空间变小时期的砂体,由于河道侧向迁移及下切能力强,非均质性较弱。根据非均质性表征结果,提出了调剖注汽、分层注汽等开发调整建议,为进一步扩大蒸汽驱试验及剩余油挖潜提供了坚实的地质依据。
[Abstract]:The study area is located in a steam drive test area in Liaohe Oilfield. Taking the fan delta front sand body in the reservoir area as the research object and synthesizing 400 well logging data and 6 coring wells data and various test data, the reservoir heterogeneity in this area is characterized qualitatively and quantitatively. This paper analyzes the main controlling factors and distribution law of heterogeneity, probes into the influence of heterogeneity on reservoir development, and puts forward corresponding suggestions for development adjustment. The results show that muddy intercalation, physical intercalation and diagenetic cemented intercalation are developed in the study area, the frequency of intercalation is between 0.052 and 0.17 layers / m, the average thickness of muddy intercalation is 1.52 ~ 3.84 m, and the coefficient of variation of permeability of the main reservoir layer is between 0.59 and 1.01. The average permeability difference is between 55.51 and 462.42, the average penetration coefficient is between 2.37 and 3.75, and the sand body type includes underwater distributary channel, estuarine bar, underwater distributary channel sand. The vertical superposition model includes connected type, weakly connected type and disconnected type, and the plane distribution pattern includes connected flake and strip shape, and the subaqueous distributary channel is composed of muddy and front matte sand, and the vertical superposition model includes connected type, weakly connected type and disconnected type. The whole heterogeneity is controlled by the evolution process of sedimentary environment and sedimentary dynamics, such as the sand body developed in the period when the accommodative space becomes smaller, the heterogeneity is weak because of the strong lateral migration and down-cutting ability of the channel. Based on the results of heterogeneity characterization, some suggestions for development adjustment such as profile control and steam injection and stratified steam injection are put forward, which provide a solid geological basis for further expansion of steam drive test and exploitation of remaining oil potential.
【作者单位】：中国石油勘探开发研究院;
【基金】：国家科技重大专项(2016ZX05010-001)
【分类号】：P618.13

【参考文献】