本文選題：層序地層格架 + 巖相特征��； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：伊通盆地鹿鄉(xiāng)斷陷是陸相斷陷盆地,位于伊通盆地郯廬斷裂北側(cè)延伸一帶,其古近系雙陽組雙二段地層為長春油田昌10區(qū)塊的勘探目的層。本文充分利用了前人研究結(jié)論,以層序地層學(xué)、沉積學(xué)等學(xué)科理論為指導(dǎo),利用巖心、測井等數(shù)據(jù),對雙陽組雙二段地層展開精細(xì)研究,揭示了雙二段地層在其沉積時(shí)期的層序沉積特征,并在層序框架下分析其儲層發(fā)育特征。1、以長春油田對雙陽組雙二段地層劃分方案為基礎(chǔ),利用鉆井巖心和測井曲線數(shù)據(jù),詳細(xì)研究了三級層序界面的識別標(biāo)志TQ1與SQ1層序中體系域界面Tq1,重新建立雙陽組雙二段地層高分辨率等時(shí)地層格架,從而建立起研究區(qū)小層的劃分新方案:將雙二段地層劃分為2個(gè)三級層序(SQ1、SQ2)、5個(gè)四級層序(S2Ⅰ、S2Ⅱ、S2Ⅲ、S2Ⅳ、S2Ⅴ)。繪制精細(xì)地層格架對比圖和單砂體對比剖面圖,從橫向上研究雙二段砂體連通性,2、詳細(xì)研究了雙二段取心井的巖心特征,從巖石類型、測井曲線等沉積相識別標(biāo)志,總結(jié)出2種沉積亞相及7種沉積微相特征,將S2Ⅰ和S2Ⅴ砂組識別為扇三角洲前緣亞相沉積體系,S2Ⅱ、S2Ⅲ和S2Ⅳ砂組識別為扇三角洲平原亞相沉積體系。雙二段含有的沉積微相為礫質(zhì)河道/砂質(zhì)河道、水下河道、廢棄河道、溢岸砂、河口壩、遠(yuǎn)砂壩、決口扇。以此建立了雙二段巖性-巖相及其組合類型的測井響應(yīng)模型。并在層序框架下,揭示了橫縱向砂組巖相發(fā)育規(guī)律。繪制連井沉積剖面圖,為研究區(qū)儲層的研究奠定了基礎(chǔ)。3、通過對鉆井巖心的研究,從巖石類型、孔隙度和滲透率特征著手,分析儲層的成巖作用及孔滲類型,研究成巖作用對孔隙結(jié)構(gòu)的影響,巖石經(jīng)歷中成巖階段A期,成巖作用類型包括壓實(shí)作用、壓溶作用、膠結(jié)作用、溶解溶蝕作用和交代作用,孔隙類型包括原生孔隙、次生孔隙和次生裂縫。通過繪制各小層單砂體孔隙度和滲透率平面圖,對單砂層孔滲發(fā)育規(guī)律加以研究,將雙二段儲層確定中孔-特低孔、中低-低滲非均質(zhì)類型儲層。4、區(qū)分水層與有效儲層的界限,通過對各測井曲線及孔隙度、滲透率資料的研究,將油層、油水同層確定為雙二段的有效儲層。揭示出有效儲層受層控和相控的影響,其分布與砂體骨架系統(tǒng)相契合,并受河道微相展布控制的特征,從而總結(jié)出雙二段有效儲層主要在五級層序中發(fā)育,分別集中發(fā)育于層序一和層序二的低水位體系域和高水位體系域。
[Abstract]:Luxiang fault depression in Yitong basin is a continental fault depression basin located in the northern extension of Tanlu fault in Yitong basin. The Shuangyang formation of the Paleogene system is the exploration target layer of Chang 10 block in Changchun Oilfield. This paper makes full use of the previous research conclusions, guided by the theories of sequence stratigraphy, sedimentology and other disciplines, using core, logging and other data to carry out a detailed study of the Shuangyang formation. This paper reveals the sequence sedimentary characteristics of the Shuang2 formation during its sedimentary period, and analyzes its reservoir development characteristics under the framework of sequence. Based on the plan of stratigraphic division of Shuangyang formation in Changchun Oilfield, the data of drilling core and logging curve are used. The recognition mark of the third-order sequence interface (TQ1) and the system tract interface (Tq1) in the SQ1 sequence are studied in detail, and the high-resolution isochronous stratigraphic framework of the Shuangyang formation is re-established. Thus, a new scheme for the division of substrata in the study area has been established: the double member strata are divided into two third-order sequences SQ1SQ2, and five fourth order sequences S2 鈪，

本文編號：1799416