本文選題：陜北斜坡 + 長2�。� 參考：《西安石油大學(xué)》2015年碩士論文

【摘要】：鄂爾多斯盆地油氣資源豐富,屬于我國第二大含油氣盆地,研究區(qū)位于鄂爾多斯盆地陜北斜坡南部,長2油層組為其主力產(chǎn)油層。為了進(jìn)一步地研究該區(qū)油藏分布的主控因素,本文以沉積學(xué)與石油地質(zhì)理論為指導(dǎo),在收集大量地質(zhì)、鉆井、測井、試油等資料的基礎(chǔ)上,結(jié)合區(qū)域地質(zhì)背景,對研究區(qū)長2油層組地層劃分與對比、構(gòu)造特征、沉積微相及砂體展布、儲層特征等內(nèi)容綜合研究,并利用殘余厚度法恢復(fù)了研究區(qū)長1油層組頂部古地貌,分析其與油藏分布關(guān)系,最終總結(jié)出研究區(qū)油氣分布的主控因素。研究表明,長2油層組可劃分為長21、長22和長23三個(gè)油層亞組;長2油層組頂部構(gòu)造總體表現(xiàn)為西傾單斜,發(fā)育近東西向的多排鼻狀構(gòu)造隆起;長2屬于三角洲平原及三角洲前緣亞相沉積,相互疊置的分流河道及水下分流河道砂體是主要的儲集體,巖性以細(xì)粒的長石砂巖和巖屑長石砂巖為主;結(jié)合研究區(qū)儲層物性、儲集空間的宏觀特征、微觀孔隙結(jié)構(gòu)特征、毛管壓力曲線特征以及儲層厚度、巖性等,將長2儲層劃分為Ⅱ類儲層;與鄰區(qū)相比,長2油藏具有含水率較高的特點(diǎn)。綜合分析認(rèn)為,古地貌對長2油藏起到破壞性作用,但其相對高部位、砂頂構(gòu)造中的鼻狀隆起、河道厚砂體是油藏富集的主要控制因素,長1的區(qū)域性蓋層以及長2油層組內(nèi)部每個(gè)沉積旋回的頂部發(fā)育的泥巖、粉砂質(zhì)泥巖是其良好的封蓋條件。
[Abstract]:The Ordos Basin is rich in oil and gas resources and belongs to the second largest oil and gas bearing basin in China. The study area is located in the south of the northern slope of the Ordos Basin with Chang 2 reservoir as its main oil producing layer. In order to further study the main controlling factors of reservoir distribution in this area, based on the theory of sedimentology and petroleum geology, and on the basis of collecting a large amount of data of geology, drilling, logging and oil testing, this paper combines with the regional geological background. The stratigraphic division and correlation, structural characteristics, sedimentary microfacies and sandbody distribution, reservoir characteristics of Chang 2 oil formation in the study area are comprehensively studied, and the paleogeomorphology of the top of Chang 1 oil formation in study area is restored by residual thickness method. Finally, the main controlling factors of oil and gas distribution in the study area are summarized. The study shows that Chang2 oil formation can be divided into three subgroups of Chang21, Chang22 and Chang23, and the top structure of Chang2 oil formation is generally inclined to the west, with multiple rows of rhinoid uplift near east-west direction, the top structure of Chang 2 oil formation can be divided into three subgroups: Chang 21, Chang 22 and Chang 23. Chang 2 belongs to delta plain and delta front subfacies, the distributary channel and underwater distributary channel sand body are the main reservoir bodies, the lithology is mainly fine feldspar sandstone and lithic feldspathic sandstone. Chang 2 reservoir is divided into class 鈪，

本文編號：1977372