三肇凹陷扶余油层储层沉积特征研究

发布时间：2018-07-09 21:58

  本文选题：三肇凹陷 + 扶余油层　； 参考：《东北石油大学》2017年硕士论文

【摘要】：三肇凹陷扶余油层勘探开发研究已有五十多年,却未能在不同区块之间以及多个开发区块形成一套统一、精细的地层分层方案,并尚未对全区储层沉积特征开展整体性的研究认识。本文根据研究区内岩心数据、测井数据、录井数据、区域地质资料并参考室内综合分析化验研究,经过反复筛选有利井位并进行了构造确认,从而建立区域性封闭骨架剖面;经过对比测井曲线特征并进行单砂体级沉积界面识别,多个开发区和不同区块之间逐级闭合,最终在研究区建立等时地层格架。基于分析区域沉积背景并结合地层厚度同时参考砂岩厚度特征,通过分析重矿物组合特征并精细解剖开发区,三肇凹陷扶余油层存在两套沉积物源体系,其南部主要受西南保康物源控制,北部主要受东北拜泉—青冈物源影响,完成对三肇凹陷扶余油层1相2亚相15微相测井微相模式的研究。结合录井资料,根据泥岩颜色厘定出FⅠ11~FⅠ42以及FⅢ42~FⅢ52湖盆范围。在此基础上,根据重矿物分布、油层组地层厚度、时间单元地层厚度以及砂体的展布规律,进而厘定出每个时间单元的南北物源分界,继而通过结合测井相模式、沉积相模式、地层等厚图以及砂岩等厚图对重点开发区以及全区沉积特征进行系统研究,并归纳认为三肇凹陷扶余油层总体上呈先水退后水进的沉积演化序列,在FⅢ油层组表现为齿状,为非常缓慢持续的水退,扶Ⅱ油层组表现为震荡式水退,FⅠ油层组表现为缓慢水进,在扶Ⅰ油层下部表现为间歇性水进,在FⅠ4发育主力砂层,扶Ⅰ上部表现为缓慢水进,在最顶部FⅠ11水下分流河道相对发育,水还是相对比较浅,但是在扶Ⅰ顶为三套油页岩,这个演化过程较为迅速的,水退最大期位于扶余油层中部的FⅡ1小层。
[Abstract]:Although the exploration and development of Fuyu reservoir in Sanzhao depression has been studied for more than 50 years, it has not been able to form a set of unified and fine stratigraphic layering schemes between different blocks and many development blocks. There is no overall understanding of reservoir sedimentary characteristics in the whole area. Based on the core data, logging data, regional geological data and laboratory comprehensive analysis and laboratory research, this paper establishes the regional closed skeleton profile by repeatedly screening the favorable well location and confirming the structure. By contrasting the logging curve and identifying the sedimentary interface of single sand body, several development zones and different blocks are closed step by step, and finally an isochronous stratigraphic framework is established in the study area. Based on the analysis of regional sedimentary background and the combination of formation thickness and sandstone thickness, by analyzing the characteristics of heavy mineral assemblage and fine dissecting the development zone, there are two sets of sediment source systems in Fuyu reservoir of Sanzhao sag. The southern part of the reservoir is mainly controlled by the southeastern Baokang provenance, and the northern part is mainly influenced by the Baiquan-Qinggang provenance in the northeast. The study on the microfacies model of 1 phase 2 subfacies 15 microfacies of Fuyu oil reservoir in Sanzhao sag has been completed. Based on the mud logging data, F 鈪，

本文编号：2110812