克拉玛依油田五2东区克上组扇三角洲储层构型分析

发布时间：2018-07-05 09:10

本文选题：扇三角洲 + 储层构型　；参考：《油气地质与采收率》2017年04期

【摘要】：克拉玛依油田五2东区克上组油藏经过20多年注水开发,油水关系复杂,提高油田开发效果已成为急需解决的问题。基于扇三角洲沉积模式、特征及沉积微相岩、电特征分析,对研究区克上组扇三角洲平原及前缘亚相,按照复合分流河道、单期分流河道、单一辫状(水下)分流河道、单一辫状分流河道砂体等级次进行储层构型单元的识别与划分。结果表明,研究区克上组单期分流河道界面主要包括泥质夹层、钙质夹层和河道冲刷界面;单一辫状(水下)分流河道具有4种识别标志,分别为河道间溢岸及泥质沉积、河道砂体顶面高程差异、河道砂体厚度差异和河道砂体测井响应差异。进而确定研究区基于储层构型分析的沉积微相分布特征:扇三角洲平原亚相辫状分流河道微相的厚度多大于4 m,宽度多大于300 m,最大可达1 500 m;扇三角洲前缘亚相水下分流河道微相的宽度为100~740 m,厚度为1~8 m;心滩微相在扇三角洲平原亚相中占主体地位,呈土豆状、块状分布,厚度为3~9 m,宽度为150~750 m,长度为200~800 m。综合分析储层构型单元及界面与剩余油饱和度模拟结果认为,研究区剩余油分布主要受储层构型单元、界面及构造因素综合控制,形成大量剩余油富集区。
[Abstract]:After more than 20 years of water injection development, the relationship between oil and water is complex, so it is urgent to solve the problem of improving the development effect of the oil field in the east area of Karamay Oilfield. Based on the fan delta sedimentary model, characteristics, sedimentary microfacies and electrical characteristics, the fan delta plain and front subfacies of the Keshang formation in the study area were analyzed according to the composite distributary channel, the single distributary channel and the single braided (underwater) distributary channel. The single braided distributary channel sand body grade carries on the reservoir configuration unit identification and the division. The results show that the single phase distributary channel interface of Keshang formation mainly includes muddy intercalation, calcareous intercalation and channel erosion interface, and single braided (underwater) distributary channel has four identification marks, which are inter-channel overflow and muddy deposition, respectively. The difference of height, thickness of channel sand body and logging response of channel sand body. Furthermore, the distribution characteristics of sedimentary microfacies based on reservoir configuration analysis in the study area are determined: the thickness of braided channel microfacies in fan delta plain subfacies is more than 4 m, the width is more than 300 m and the maximum is 1 500 m, and the fan delta front subfacies is more than 4 m in thickness and 300 m in width, and the maximum is 1 500 m in front of fan delta The width and thickness of the microfacies in the distributary channel are 100 ~ 740 m and 1 ~ 8 m respectively, and the core beach microfacies occupy the main position in the fan delta plain subfacies. It is potato like, block distribution, thickness is 3 ~ 9 m, width is 150 ~ 750 m, length is 200 ~ 800 m. The simulation results of reservoir configuration unit and interface and residual oil saturation show that the remaining oil distribution in the study area is mainly controlled by reservoir configuration unit, interface and structural factors, and a large number of remaining oil accumulation areas are formed.
【作者单位】：中国地质大学(北京)能源学院;中国石油大学(北京)地球科学学院;中国石油长庆油田分公司第三采油厂;
【基金】：国家自然科学基金项目“砾岩结构—成因分类、沉积成岩机理及其岩石物性响应模型”(41472091)
【分类号】：P618.13

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