本文選題：延長組　切入點：長6　出處：《西安石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文以構(gòu)造地質(zhì)學(xué)、層序地層學(xué)、沉積學(xué)、地球物理測井、石油地質(zhì)學(xué)等學(xué)科理論和方法為指導(dǎo),結(jié)合巖芯觀察、測井曲線、相關(guān)分析化驗等資料,對本區(qū)研究區(qū)長6油層組長611,長612,長613,長621,長622,長631,長632等7個小層的砂體分布和油層分布進行了重點研究,并探討了構(gòu)造、砂體展布及儲層非均質(zhì)性對油層分布的控制因素。研究區(qū)延長組長6期處于延安三角洲,沉積微相主要有水下分流河道、分流間灣及河口壩,河道主要呈北東-南西方向展布。長6油藏由于儲層物性差,油水混儲,同時缺乏邊、底水,油水界面不明顯,油藏類型為典型的巖性油藏。長6油層主要分布于長613,長621,長622,長612四個小層,在縱向上具有薄而多的特點。長613油層大部分都是2-3層,油層有效厚度在4-10m的井占到62%;長621油層大部分都是2層,油層有效厚度在4-8m的井占到62%,長622油層單大部分都是2層,油層有效厚度在4-8m的井占到49%。平面分布上總體呈現(xiàn)出橫向變化快,連通性較差,多呈現(xiàn)孤立裝透鏡體分布。長61,長62的鼻狀隆起對油層分布的控制程度較低。但同長61,長62油層相比,長63油層的分布受鼻狀隆起的控制相對較強。長6油層分布受儲層砂體展布控制,長63儲層僅局部含油。儲層非均質(zhì)性表現(xiàn)比較強,其中夾隔層對油層分布的影響比較大,夾層影響著油體側(cè)向及垂向的滲流,隔層在油層分布的影響上起到分隔和封堵油體的作用。
[Abstract]:This paper is guided by the theories and methods of tectonic geology, sequence stratigraphy, sedimentology, geophysical logging, petroleum geology and so on. The sandbody distribution and reservoir distribution of Chang 6 oil layer 611, Chang612, Chang613, Chang621, Chang622, Chang631 and Chang632 in this research area are studied emphatically, and the structures are discussed. Distribution of sand bodies and controlling factors of reservoir heterogeneity on reservoir distribution. Yanchang formation 6 in the study area is located in Yan'an Delta. Sedimentary microfacies mainly include underwater distributary channel, distributary bay and estuary dam. The channel is mainly distributed in the north-southeast direction. Because of the poor physical properties of the reservoir, oil and water are mixed and stored in Chang 6 reservoir. At the same time, there is a lack of edge, bottom water, and oil-water interface is not obvious. The reservoir type is typical lithologic reservoir. Chang613 oil layer is mainly distributed in Chang613, Chang621, Chang622, Chang612, and has thin and many characteristics in longitudinal.Chang613 oil layer is mostly composed of 2-3 layers. The effective thickness of reservoir is 4-10m, the reservoir is 62m, the reservoir of Chang621 is mostly two layers, the effective thickness of reservoir is 4-8m, and the single part of Chang622 reservoir is two layers. The wells with effective thickness of 4-8 m account for 49m. On the whole, the horizontal variation is fast and the connectivity is poor in the plane distribution. Most of them are isolated lens distribution. The nasal uplift with long 61th and Chang62 has lower control degree on reservoir distribution, but compared with Chang61and Chang62 oil layers, The distribution of Chang63 reservoir is controlled by the nasal uplift relatively strongly. The distribution of Chang6 reservoir is controlled by the distribution of reservoir sand body, and the reservoir of Chang63 reservoir is only partially oil-bearing. The heterogeneity of the reservoir is relatively strong, and the influence of the intercalation layer on the distribution of the reservoir is relatively large. Intercalation affects the lateral and vertical percolation of the oil body, and the interlayer plays the role of separating and plugging the oil body in the influence of the reservoir distribution.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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