發(fā)布時(shí)間：2018-02-21 07:45

  本文關(guān)鍵詞： 富林洼陷 有利儲(chǔ)層分布 成藏條件 油氣成藏主控因素　出處：《中國(guó)石油大學(xué)(華東)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：富林洼陷是濟(jì)陽(yáng)坳陷沾化凹陷東南角的一個(gè)沉積小洼陷,北以墾利斷裂帶與孤南洼陷相隔,東以墾東斷裂帶與墾東、青坨子凸起相鄰,西南向陳家莊凸起超覆,總體為一北和北東斷,南西超的倒三角形第三紀(jì)斷坳沉積小洼陷,面積約360km~2。富林洼陷斷裂活動(dòng)在平面上、垂向上差異明顯,平面上活動(dòng)強(qiáng)度呈現(xiàn)北強(qiáng)南弱、東強(qiáng)西弱的特點(diǎn);垂向上,沙三段下亞段沉積期活動(dòng)強(qiáng)度強(qiáng)于其他時(shí)期。在地震解釋的基礎(chǔ)上,配合測(cè)井資料、巖性特征以及巖心資料,綜合應(yīng)用層序界面識(shí)別的各種方法,在富林洼陷沙三-沙二段共識(shí)別出5個(gè)三級(jí)層序界面,相應(yīng)的沙二-沙三段地層中識(shí)別出了5個(gè)三級(jí)層序。結(jié)合以前對(duì)沙四段、沙一段及東營(yíng)組的層序劃分成果,古近系內(nèi)部共劃分出8個(gè)長(zhǎng)周期基準(zhǔn)面變化旋回,進(jìn)一步又劃分出14個(gè)中期基準(zhǔn)面變化旋回。本次研究分析了研究區(qū)的構(gòu)造及圈閉條件,明確了研究區(qū)的斷裂發(fā)育特征及展布規(guī)律。在巖芯觀察的基礎(chǔ)上,識(shí)別出相標(biāo)志類(lèi)型,本次研究共識(shí)別出研究區(qū)沙河街組發(fā)育扇三角洲體系、近岸水下扇體系、三角洲體系及湖泊體系(包括濁積扇體系)共4種沉積體系。結(jié)合鉆井、錄井及地震資料,在多種地質(zhì)圖件的基礎(chǔ)上,明確了研究區(qū)沉積相的平面展布規(guī)律和垂向演化特征,在開(kāi)展儲(chǔ)層物性特及物性主控因素研究的基礎(chǔ)上,明確了研究區(qū)有利儲(chǔ)層的展布特征。富林洼陷油氣分布極不均衡,油氣集中分布于中向斜北側(cè)陡翼,中次洼北、西北側(cè),墾利斷層兩盤(pán)最有利的構(gòu)造及潛山圈閉中,沿墾利斷層中段基本含油連片。少量分布于東次洼西部富7-富斜151-富15構(gòu)造高帶。在上述構(gòu)造及圈閉條件、沉積體系及有利儲(chǔ)層展布研究的基礎(chǔ)上,綜合分析研究區(qū)的油源條件,油氣運(yùn)移條件,建立了研究區(qū)的三個(gè)成藏主控因素:(1)構(gòu)造高帶與圈閉條件控制油藏平面分布,(2)儲(chǔ)層條件控制沙三底—沙四段成藏,(3)儲(chǔ)蓋組合控制縱向成藏。綜合上述分析,明確了富林洼陷下步勘探方向仍以中次洼周邊為主,特別是繼續(xù)細(xì)挖墾利斷裂帶,積極探索東次洼東、北部斷裂帶附近。
[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.
【學(xué)位授予單位】：中國(guó)石油大學(xué)(華東)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.13

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