本文選題：4-6砂層組 + 河流相��； 參考：《中國石油大學(華東)》2015年碩士論文

【摘要】：孤東油田館上段為孤東油田的主力含油段,現(xiàn)已進入高吞吐、高特含水階段,油氣采收率低,剩余油在全區(qū)廣泛分布。其中儲層非均質(zhì)性是控制剩余油分布的主要原因,隔夾層又是導致儲層非均質(zhì)性研究的重要因素,因而有必要對研究區(qū)儲層隔夾層展開研究。本文綜合地質(zhì)、測井、生產(chǎn)動態(tài)等多種資料,,系統(tǒng)的研究了孤東油田九區(qū)館上段4-6砂層組沉積特征、隔夾層巖電特征、識別標準、成因機制、分布特征及隔夾層對剩余油的影響。主要取得了如下研究成果和認識:(1)研究區(qū)4-6砂層組為河流相沉積,其中Ng54-Ng6為辮狀河沉積,Ng4-Ng52為曲流河沉積。河道規(guī)模以42、52、55、61小層發(fā)育時期最大,河道砂體廣為發(fā)育。(2)研究區(qū)主要存在泥質(zhì)隔夾層、物性隔夾層,鈣質(zhì)隔夾層極少發(fā)育。通過對取心井物性的研究,建立了隔夾層的電性標準。研究區(qū)隔夾層的成因主要包括洪水間歇期、河道遷移、洪水減弱期及水體能量波動等形成的泥粉質(zhì)隔夾層和無機成巖成因、生物成巖成因的鈣質(zhì)隔夾層。(3)以研究區(qū)主力含油小層為例,分析了隔層和夾層的分布特征及與沉積微相的關(guān)系。垂向上辮狀河隔夾層分布較廣,但是穩(wěn)定性差而曲流河隔夾層分布局限,但是穩(wěn)定較好。平面上,隔夾層在河道亞相厚度較薄,而在河道邊緣及泛濫平原地區(qū)隔夾層厚度較大。(4)采用隨機建模的方法,應用petrel軟件,建立了研究區(qū)館55-61砂層的隔夾層的空間分布模式,將隔夾層具體的分為穩(wěn)定型、過渡型和隨機型三種類型,并總結(jié)了不同類型隔夾層的地質(zhì)特征。(5)隔夾層主要是通過毛細管壓力來遮擋油氣運移的。穩(wěn)定性越好、隔夾層位于儲層頂部和注水井鉆遇隔夾層所形成的剩余油飽和度最高。
[Abstract]:Guanupper member of Gudong Oilfield is the main oil bearing section of Gudong Oilfield. It has entered the stage of high huff and puff and high water cut. The oil and gas recovery is low and the remaining oil is widely distributed in the whole area. The reservoir heterogeneity is the main reason for controlling the distribution of remaining oil, and the intercalation is an important factor leading to the study of reservoir heterogeneity, so it is necessary to study the interlayer between reservoirs in the study area. In this paper, we have systematically studied the sedimentary characteristics, electrical characteristics of intercalation rocks, identification criteria and genetic mechanism of 4-6 sand formation in the upper member of Guanshan formation in Guanshou formation of Gudong Oilfield by synthesizing many kinds of data, such as geology, logging, production dynamics, and so on. Distribution characteristics and the influence of interlayer on remaining oil. The main results of this study are as follows: (1) the 4-6 sand formation in the study area is fluvial facies, and Ng54-Ng6 is braided stream sediment Ng4-Ng52 is meandering stream deposition. In the study area, there are mainly muddy intercalation, physical intercalation and calcareous intercalation. Through the study of the physical properties of coring wells, the electrical property standard of interlayer is established. The causes of the intercalation mainly include the intercalation of flood, the migration of river, the weakening of flood and the fluctuation of water energy, and the genesis of inorganic diagenesis. Taking the main oil-bearing layers in the study area as an example, the distribution characteristics of the intercalation and their relationship with sedimentary microfacies are analyzed. The vertical braided intercalation distributes more widely, but the stability is poor, but the meandering intercalation distribution is limited, but the stability is better. On the plane, the intercalation is thinner in the subfacies of the channel, while in the edge of the river and in the flood plain area, the thickness of the interlayer is larger.) by using the method of stochastic modeling and using the software of petrel, the spatial distribution model of the interlayer of the 55-61 sand layer in the study area is established. The interlayer is divided into three types: stable type, transition type and random type, and the geological characteristics of different types of intercalation are summarized. The interlayer is mainly shielded by capillary pressure to block oil and gas migration. The better the stability is, the highest remaining oil saturation is formed when the interlayer is located at the top of the reservoir and the water injection well is drilled with the separated interlayer.
【學位授予單位】：中國石油大學(華東)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE311;P618.13

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本文編號：1912650