本文選題：青南洼陷 + 沙四上亞段��； 參考：《中國石油大學(xué)(華東)》2015年碩士論文

【摘要】：青南洼陷位于東營凹陷東部,勘探面積約為300km2,其中的主要勘探目的層段是沙四上亞段,沙四上亞段本身發(fā)育存在有多套不同的沉積體系,導(dǎo)致發(fā)育多種不同的沉積相類型,因而產(chǎn)生許多不同的儲集體類型,使沙四上亞段中的儲層特征十分復(fù)雜,進(jìn)而使油氣勘探條件變得復(fù)雜,影響進(jìn)一步的油氣勘探工作。針對上述問題,綜合運(yùn)用層序地層學(xué)、沉積學(xué)、儲層地質(zhì)學(xué)、石油地質(zhì)學(xué)等理論和技術(shù),針對具有不同機(jī)制的不同類型的儲集體、不同類型儲集體中的不同儲層特征及其對青南洼陷勘探工作的油氣成藏關(guān)系進(jìn)行系統(tǒng)的研究。研究結(jié)果表明,針對青南洼陷沙四上亞段砂體類型識別出4種沉積相、11種沉積亞相;在靠近青坨子凸起的陡坡帶,近岸水下扇以及扇三角洲發(fā)育其中,在青坨子凸起的南部分為西次洼和東次洼的洼陷帶,扇三角洲和濱淺湖灘壩發(fā)育其中,在靠近廣饒凸起北部的南部緩坡帶,發(fā)育有三角洲沉積。明確了在沉積縱向剖面和沉積平面上的變化和分布規(guī)律。青南洼陷沙四上亞段儲層主要為濱淺湖灘壩砂巖。儲集空間類型以原生孔隙為主,其中夾雜發(fā)育少量的次生孔隙和裂縫;儲層成巖作有三種類型,以點(diǎn)接觸為主的壓實(shí)作用,以亮晶方解石膠結(jié)為主的膠結(jié)作用和少量的溶解和交代作用。按照沉積相帶劃分,青南洼陷扇三角洲與三角洲發(fā)育中-高孔高滲儲層,濱淺湖灘壩發(fā)育中孔中滲儲層,近岸水下扇發(fā)育特低孔特低滲儲層。青南洼陷具有良好的生儲蓋組合,主力含油儲集層為濱淺湖灘壩砂及部分近岸水下扇儲集層,從北向南呈現(xiàn)構(gòu)造-巖性-構(gòu)造油藏的分布規(guī)律,儲層物性決定著油氣產(chǎn)能,扇三角洲和三角洲油氣產(chǎn)能最高,其次是灘壩砂體儲層產(chǎn)能,近岸水下扇油氣產(chǎn)能最低。
[Abstract]:The Qingnan sag is located in the eastern part of Dongying sag, and the exploration area is about 300km2. The main exploration target formation is the upper part of Sha 4. There are many sets of different sedimentary systems developed in the upper segment of sand 4, which leads to the development of many different sedimentary facies types. As a result, there are many different reservoir types, which make the reservoir characteristics in the upper submember of Sha 4 very complex, and further complicate the oil and gas exploration conditions, which will affect the further oil and gas exploration work. In order to solve the above problems, the theories and techniques of sequence stratigraphy, sedimentology, reservoir geology, petroleum geology and so on are comprehensively applied to different types of reservoirs with different mechanisms. The characteristics of different reservoirs in different types of reservoirs and their relation to hydrocarbon accumulation in exploration work in Qingnan sag are systematically studied. The results show that four sedimentary facies and 11 sedimentary subfacies have been identified according to the sandbody types of the upper submember of Sha 4 in the Qingnan sag and developed in the steep slope zone near the Qingtuozi uplift, the nearshore underwater fan and the fan delta. The southern part of the Qingtuozi uplift is divided into Xizi depression and Dongzi depression. Fan delta and shore-shallow lake beach and dam are developed among them, and delta deposits are found in the southern gentle slope zone near the northern part of Guangrao uplift. The variation and distribution of the sedimentary longitudinal profile and the sedimentary plane are clarified. The reservoir of the upper submember of Sha 4 in Qingnan sag is mainly shore-shallow lake beach dam sandstone. The main types of reservoir space are primary pores, in which a small amount of secondary pores and fractures are developed, and there are three types of reservoir diagenesis, which is compaction with point contact. The cementation is dominated by brilliant calcite cementation and a small amount of dissolution and metasomatism. According to sedimentary facies zone, fan delta and delta developed medium-high porosity and high permeability reservoir in Qingnan sag, middle pore and middle permeability reservoir developed in shoreside shallow lake beach dam, and ultra-low porosity and low permeability reservoir developed in near-shore underwater fan. The Qingnan sag has a good assemblage of source, reservoir and caprock, the main oil-bearing reservoir is shore-shallow lake beach bar sand and part of near-shore underwater fan reservoir. From north to south, it presents the distribution law of tectonic-lithology-structural reservoir, and the physical property of reservoir determines the oil and gas productivity. Fan delta and delta have the highest oil and gas productivity, followed by beach bar sand reservoir productivity, and the inshore underwater fan oil and gas productivity is the lowest.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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