富林洼陷富117井区油气成藏条件及勘探目标研究

发布时间：2018-02-21 07:45

本文关键词： 富林洼陷有利储层分布成藏条件油气成藏主控因素　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

【摘要】：富林洼陷是济阳坳陷沾化凹陷东南角的一个沉积小洼陷,北以垦利断裂带与孤南洼陷相隔,东以垦东断裂带与垦东、青坨子凸起相邻,西南向陈家庄凸起超覆,总体为一北和北东断,南西超的倒三角形第三纪断坳沉积小洼陷,面积约360km~2。富林洼陷断裂活动在平面上、垂向上差异明显,平面上活动强度呈现北强南弱、东强西弱的特点;垂向上,沙三段下亚段沉积期活动强度强于其他时期。在地震解释的基础上,配合测井资料、岩性特征以及岩心资料,综合应用层序界面识别的各种方法,在富林洼陷沙三-沙二段共识别出5个三级层序界面,相应的沙二-沙三段地层中识别出了5个三级层序。结合以前对沙四段、沙一段及东营组的层序划分成果,古近系内部共划分出8个长周期基准面变化旋回,进一步又划分出14个中期基准面变化旋回。本次研究分析了研究区的构造及圈闭条件,明确了研究区的断裂发育特征及展布规律。在岩芯观察的基础上,识别出相标志类型,本次研究共识别出研究区沙河街组发育扇三角洲体系、近岸水下扇体系、三角洲体系及湖泊体系(包括浊积扇体系)共4种沉积体系。结合钻井、录井及地震资料,在多种地质图件的基础上,明确了研究区沉积相的平面展布规律和垂向演化特征,在开展储层物性特及物性主控因素研究的基础上,明确了研究区有利储层的展布特征。富林洼陷油气分布极不均衡,油气集中分布于中向斜北侧陡翼,中次洼北、西北侧,垦利断层两盘最有利的构造及潜山圈闭中,沿垦利断层中段基本含油连片。少量分布于东次洼西部富7-富斜151-富15构造高带。在上述构造及圈闭条件、沉积体系及有利储层展布研究的基础上,综合分析研究区的油源条件,油气运移条件,建立了研究区的三个成藏主控因素:(1)构造高带与圈闭条件控制油藏平面分布,(2)储层条件控制沙三底—沙四段成藏,(3)储盖组合控制纵向成藏。综合上述分析,明确了富林洼陷下步勘探方向仍以中次洼周边为主,特别是继续细挖垦利断裂带,积极探索东次洼东、北部断裂带附近。
[Abstract]:The Fulin sag is a small depositional depression in the southeast corner of Zhanhua sag in Jiyang depression. In the north, it is separated by the Kenli fault zone from the Gunan sag, to the east by the Kendong fault zone and to the east, adjacent to the Qingtuozi uplift, and to the southwest by the Chenjiazhuang uplift. In general, there are one north and north east faults, and a small depressional depression of inverted triangle Tertiary fault depression in Nanxi Chao, covering an area of 360 km2. 2. The fault activity of Fulin sag is obviously different in vertical direction, and the activity intensity in the plane shows the characteristics of north strong and south weak, east strong and west weak; On the basis of seismic interpretation, combined with logging data, lithologic characteristics and core data, various methods of sequence interface identification are used. Five third-order sequence interfaces were identified in the third and second member of Shahejie formation in the Fulin sag, and five third-order sequences were identified in the corresponding formation of Sha-Er-Sha _ 3. The results of sequence division of the fourth member, the first member and the Dongying formation of the fourth member, the first member and the Dongying formation were combined. The Paleogene system is divided into eight long-period base-level change cycles and 14 mid-term base-level variation cycles. The structure and trap conditions of the study area are analyzed in this study. On the basis of core observation, the types of facies markers are identified. In this study, the fan delta system developed in Shahejie formation and the underwater fan system near shore are identified. There are four sedimentary systems in delta system and lake system (including turbidite fan system). Combined with drilling, logging and seismic data, the plane distribution and vertical evolution characteristics of sedimentary facies in the study area are determined on the basis of various geological maps. On the basis of the study of reservoir physical properties and physical property controlling factors, the distribution characteristics of favorable reservoirs in the study area are determined. The distribution of oil and gas in the Fulin sag is extremely uneven, and the oil and gas distribution is concentrated on the north side of the central syncline, the north of the Zhongzaiwa and the north of the west. The most favorable structures and buried hill traps in the two plates of the Kenli fault, along the middle section of the Kensi fault, are basically oil bearing continuous slices. A small number of them are distributed in the western part of Dongziwa, rich 7-Fu oblique 151-rich 15 structural high belt. In the above structural and trap conditions, Based on the study of sedimentary system and favorable reservoir distribution, the oil source conditions, oil and gas migration conditions in the study area are comprehensively analyzed. Three main controlling factors of reservoir formation in the study area are established: 1) the structural high zone and trap condition control the reservoir plane distribution and the reservoir condition control the reservoir formation, the reservoir and cap assemblage control the vertical reservoir formation. It is clear that the next exploration direction of Fulin sag is still mainly around the middle subdepression, especially the Kensi fault zone continues to be carefully excavated to actively explore the east of Dongzi depression and the vicinity of the northern fault zone.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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