二连盆地哈南地区阿尔善组四段沉积相研究

发布时间：2018-05-26 14:17

本文选题：二连盆地 + 哈南地区　；参考：《西南石油大学》2015年硕士论文

【摘要】：哈南地区位于二连盆地阿南凹陷东部,在不同层位已发现多个油藏,其中阿尔善组四段是哈南地区最主要的产油层位之一。由于工区断块破碎,为地层划分与对比和储层预测带来较大难度,因此加强该区沉积相研究,无疑对储层砂体预测和油田增储增产具有重要意义。本文以岩心观察描述和分析化验资料为基础,通过测井曲线的相标定,详细分析了阿四段沉积相分布与演化特征和沉积微相与储层发育的关系。得到如下认识： 1、在标志层和沉积旋回控制下,将阿四段自下而上划分为AI下、AI中和AI上三个砂层组,由于剥蚀作用,三个砂层组分布面积依次减小,三个砂层组均呈南、北薄中间厚,东一西向上薄、厚相问的特点。地层厚度变化大,受同沉积断层和古隆起影响明显。 2、根据岩石成分和结构成熟度,结合古地貌特征,综合判断阿四段沉积物源来自蒙古林凸起、苏尼特隆起和莎音乌苏凸起。 3、阿四段为近岸水下扇-扇三角洲-湖泊相沉积体系,可进一步划分出六种亚相和十一种微相。近岸水下扇可分为扇根、扇中和扇端三种亚相,发育的微相包括扇根主水道和主水道间微相,扇中辫状水道和辫状水道间微相,以及扇端泥微相。扇三角洲包括扇三角洲前缘和前扇三角洲亚相,扇三角洲平原亚相不发育,扇三角洲前缘内发育水下分流河道、席状砂和分流间湾微相,前扇三角洲主要为前扇三角洲泥。此外工区内还有滨浅湖亚相,包括滩坝和滨浅湖泥微相。 4、根据大量的物性分析资料统计,水下分流河道微相是最有利的储集相带,其次为席状砂,辫状水道和滩坝则较差。
[Abstract]:The Hanan area is located in the eastern part of Anan depression in Erlian Basin, and several reservoirs have been found in different formations, among which the fourth member of the Alshan formation is one of the most important oil-producing formations in the Hannan area. Due to the fracture of fault blocks in the working area, it is difficult for stratigraphic division and correlation and reservoir prediction. Therefore, it is of great significance to strengthen the study of sedimentary facies in this area for the prediction of reservoir sand body and the increase of reservoir, reservoir and production. Based on core observation description and analysis of laboratory data, the distribution and evolution of sedimentary facies and the relationship between sedimentary microfacies and reservoir development are analyzed in detail through phase calibration of logging curves. The following was recognized: 1. Under the control of marker layer and sedimentary cycle, the A4 member is divided into three sand formations under AI and AI. Due to denudation, the distribution area of the three sand formations decreases in turn, and the three sand formations are all of the thickness of the south and the north. The characteristic of being thin and thick in the east-west direction. The thickness of the strata varies greatly and is obviously influenced by synsedimentary faults and paleouplift. 2. According to the rock composition and structural maturity, combined with the paleogeomorphological features, the sediment sources of the fourth member of the A4 member are from the Mongolia forest uplift, Sunita uplift and Shayinwusu uplift. 3. The A4 formation is a near-shore subaqueous fan delta lacustrine sedimentary system, which can be further divided into 6 subfacies and 11 microfacies. The underwater fan can be divided into three subfacies: fan root, fan and fan end. The microfacies developed include the microfacies of the main fan root channel and the main channel, the microfacies between the braided channel and the braided channel in the fan, and the mud microfacies at the end of the fan. Fan delta consists of fan delta front and front fan delta subfacies, fan delta plain subfacies is not developed, subaqueous distributary channel, sheet sand and interdistributary bay microfacies are developed in fan delta front, and front fan delta is mainly composed of front fan delta mud. In addition, there are shallow lacustrine subfacies in the area, including beach dam and shallow lake mud microfacies. 4. According to a lot of physical analysis data, the microfacies of underwater distributary channel is the most favorable reservoir facies zone, followed by sheet sand, braided channel and beach dam.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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