本文選題：定邊油田 + 長1　； 參考：《西安石油大學(xué)》2017年碩士論文

【摘要】：本文將定邊油田東關(guān)區(qū)長1油藏作為研究對象,結(jié)合測井、化驗(yàn)分析、試油等資料,從區(qū)域構(gòu)造特征、油源條件、砂體展布及沉積微相特征、儲層特征等多方面對長1油藏精細(xì)研究,總結(jié)其主要油藏類型、油層分布特征及控制因素。依據(jù)巖性變化及旋回特征將長1油藏分為長1~1—長1~3共3個油層組。西傾單斜內(nèi)發(fā)育幅度不等的鼻隆;本區(qū)長1期處三角洲平原沉積環(huán)境,發(fā)育北東-南西向帶狀展布的分流河道砂,其中長1~2砂體發(fā)育程度最好,全區(qū)有大面積的分流河道砂展布,而長1~1和長1~3則以河道側(cè)翼為主;長1儲層以中-細(xì)粒長石砂巖及巖屑長石砂巖為主,孔隙類型為殘余粒間孔及長石溶孔,孔喉組合為中孔中細(xì)吼型,低孔低滲儲層,隔夾層的發(fā)育使長1儲層具較強(qiáng)的非均質(zhì)性;研究區(qū)長1~1和長1~2的含油性較好,長1~3極少見油層分布,長1~1底部油層分布廣泛,橫向連通性較好,長1~2油層疊置分布,局部見較厚透鏡狀油層分布。長1主要為構(gòu)造-巖性油藏,其次為巖性油藏,多為油水同層且油水界面不易辨別。長1油藏距長7烴源巖較遠(yuǎn),源巖分布直接控制生烴量;在鼻隆中心及兩翼多見油氣聚集,故鼻狀構(gòu)造是長1油層分布的主控因素,同時因鼻隆容納空間過小、油氣沖注過剩而在非隆起地帶見油層分布;長1油層的展布形態(tài)、規(guī)模、延伸方向與分流河道展布大體一致,呈片帶狀展布;長1~1和長1~2優(yōu)良的儲蓋組合使其含油性明顯好于長1~3;長1儲層非均質(zhì)性較強(qiáng),具體表現(xiàn)在隔夾層的發(fā)育程度及平面上物性變化等方面,隔夾層阻止油氣運(yùn)移,有利于油氣聚集成藏。
[Abstract]:In this paper, the Chang 1 reservoir in Dongguan area of Dingbian Oilfield is taken as the object of study. Combining with the data of logging, laboratory analysis and oil testing, the characteristics of regional structure, oil source conditions, distribution of sand bodies and sedimentary microfacies are analyzed. The main reservoir types, reservoir distribution characteristics and controlling factors of Chang 1 reservoir are summarized. According to the lithologic changes and cyclic characteristics, Chang 1 oil reservoir is divided into 3 reservoir groups: Chang 1 Li 1-Chang 1 Li 3. In the first stage of this area, the delta plain sedimentary environment is located and distributary channel sand is distributed in the north east to south west direction, in which the sand body of Chang 1 is the best. The distributary channel sand distributes in a large area in the whole area, while Chang 1Y 1 and Chang 1 Xi 3 are mainly located on the flank of the channel, and Chang 1 reservoir is dominated by medium and fine feldspar sandstone and lithic feldspathic sandstone, and the pore types are residual intergranular pore and feldspar dissolution pore. The pore throat assemblage is mesoporous and low permeability reservoir with low porosity and low permeability. The development of intercalation makes Chang1 reservoir have strong heterogeneity. The lateral connectivity is better, the oil layer of 1 ~ 2 is overlaid, and the distribution of thick lenticular oil layer is observed locally. Chang 1 is mainly a tectonic-lithologic reservoir, followed by a lithologic reservoir, most of which are the same layer of oil and water, and the oil-water interface is difficult to distinguish. Chang1 reservoir is far away from Chang7 source rock, the distribution of source rock directly controls hydrocarbon generation, oil and gas accumulation is more common in the center and flanks of the nose uplift, so the nose structure is the main controlling factor of the distribution of Chang 1 oil layer, at the same time, the space of the nose uplift is too small. The distribution of oil layer in the non-uplift zone is similar to that of distributary channel, and the distribution pattern, scale, extension direction of Chang-1 oil layer are roughly the same as that of distributary channel. The excellent combination of reservoir and caprock of Chang1-1 and Chang1zhu2 makes its oil content obviously better than that of Chang1Q3, and the reservoir of Chang1 has strong heterogeneity, which is manifested in the development degree of intercalation and the change of physical property on the plane, and the interbed prevents oil and gas migration. It is favorable for oil and gas accumulation to form reservoir.
【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】：2017
【分類號】：P618.13

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