【摘要】：二疊紀(jì)是準(zhǔn)噶爾盆地形成演化的關(guān)鍵變革期,是發(fā)展盆地分析理論的天然實(shí)驗(yàn)室,該層系油氣資源量居各個(gè)層系首位,發(fā)展前景廣闊。因此研究二疊系構(gòu)造-地層層序,探討盆地演化歷史,對(duì)于深入認(rèn)識(shí)準(zhǔn)噶爾盆地油氣地質(zhì)條件,開展地區(qū)油氣資源預(yù)測(cè)具有重大意義。本論文以層序地層學(xué)、構(gòu)造地質(zhì)學(xué)理論為基礎(chǔ),利用最新的鉆測(cè)井和地震等資料,建立準(zhǔn)噶爾盆地二疊紀(jì)地層系統(tǒng),識(shí)別出區(qū)域不整合,劃分構(gòu)造-地層層序,并劃分盆地演化階段;在以上研究基礎(chǔ)上,按照單井相-連井相-平面相的思路,最終恢復(fù)準(zhǔn)噶爾盆地二疊系沉積充填演化過(guò)程。本次研究取得了以下幾點(diǎn)認(rèn)識(shí):(1)準(zhǔn)噶爾盆地二疊系可識(shí)別出兩個(gè)一級(jí)區(qū)域不整合(C/P和P/T)和一個(gè)二級(jí)區(qū)域不整合(P1/P2),同時(shí)在二疊系內(nèi)部還發(fā)育有三個(gè)三級(jí)構(gòu)造不整合(P1j/P1f、P2x/P2w和P2w/P3w)。它們的形成主要受控于構(gòu)造運(yùn)動(dòng)。不整合類型主要以削截和上超為主�，敽枷�、沙灣凹陷以及中拐凸起是不整合發(fā)育的主要構(gòu)造單元,另外東部隆起各凹陷、中央坳陷莫索灣凸起、東道海子凹陷也有發(fā)育。(2)根據(jù)準(zhǔn)噶爾盆地二疊系6個(gè)不整合面的級(jí)別,將其劃分為中上二疊統(tǒng)和下二疊統(tǒng)兩個(gè)二級(jí)構(gòu)造層以及佳木河組、風(fēng)城組、夏子街組、下烏爾禾組和上烏爾禾組5個(gè)三級(jí)構(gòu)造層。(3)準(zhǔn)噶爾盆地二疊紀(jì)沉積充填具有如下特點(diǎn):西北緣經(jīng)歷了佳木河組火山巖相→風(fēng)城組扇三角洲平原亞相→夏子街組沖積扇相→下烏爾禾組扇三角洲相;中央坳陷瑪湖-沙灣凹陷經(jīng)歷了佳木河組扇三角洲相→風(fēng)城組-中上二疊統(tǒng)濱淺湖相;中央坳陷東道海子凹陷-阜康凹陷經(jīng)歷了佳木河組淺湖相→風(fēng)城組扇三角洲相、濱淺湖相→中上二疊統(tǒng)濱淺湖相;準(zhǔn)東地區(qū)經(jīng)歷了金鉤組扇三角洲、沖積扇相→將軍廟組扇三角洲相→中上二疊統(tǒng)扇三角洲相、濱淺湖相。早二疊世盆地沉積中心位于西北緣克-夏斷階帶,中二疊世位于瑪湖凹陷,晚二疊世位于盆一井西凹陷,沉積中心逐漸向南遷移。(4)準(zhǔn)噶爾盆地二疊紀(jì)構(gòu)造演化經(jīng)歷了:佳木河組沉積期周緣前陸盆地階段-風(fēng)城組沉積期聯(lián)合前陸盆地階段-二疊紀(jì)中期前陸盆地持續(xù)發(fā)展階段-上烏爾禾組沉積期前陸盆地向坳陷盆地轉(zhuǎn)化的前陸盆地消亡階段。
[Abstract]:Permian is the key transformation period for the formation and evolution of Junggar Basin. It is a natural laboratory for the development of basin analysis theory. Therefore, it is of great significance to study the tectonic-stratigraphic sequence of the Permian system and to explore the evolution history of the basin, which is of great significance for further understanding of the oil and gas geological conditions in Junggar Basin and for the prediction of regional oil and gas resources. Based on the theory of sequence stratigraphy and tectonic geology, using the latest drilling logging and seismic data, this paper establishes the Permian stratigraphic system of Junggar Basin, identifies the regional unconformity, and divides the tectonic-stratigraphic sequence. And divided into basin evolution stages; On the basis of the above research, according to the thought of single well facies, contiguous well facies and plane facies, the evolution process of Permian sedimentary filling in Junggar Basin was finally restored. The results of this study are as follows: (1) the Permian system in Junggar Basin can identify two primary regional unconformities (C / P and P / T) and a secondary regional unconformity (P1/P2). At the same time, there are three tertiary structural unconformities (P1j / P1fP1fP2x / P2w and P2w/P3w) developed within the Permian. Their formation is mainly controlled by tectonic movements. The main types of unconformity are truncation and superposition. Mahu sag, Shawan sag and Zhongguai uplift are the main structural units of unconformity. In addition, each sag in the eastern uplift and Mosuowan uplift in the central depression, (2) according to the grade of 6 unconformities of Permian system in Junggar Basin, it can be divided into two secondary tectonic layers of middle and upper Permian and lower Permian, as well as Jiamuhe formation, Fengcheng formation, Xiazijie formation, etc. (3) the Permian sedimentary filling in Junggar Basin has the following characteristics: the northwestern margin experienced the volcanic facies of the Jiamuhe formation, the fan delta plain subfacies of the Jiamuhe formation and the fan-delta plain subfacies of the Xiaxizi formation. (3) the Permian sedimentary filling in the Junggar Basin is characterized by the following characteristics: The alluvial fan facies of the Street formation and the fan delta facies of the lower Wuerhe formation; The Mahu-Shawan sag in the central depression has experienced the fan delta facies of the Jiamuhe formation, the Fengcheng formation and the shore-shallow lacustrine facies of the middle and upper Permian. The Dongdao Haizi Sag and Fukang Sag of the Central Depression have experienced the fan delta facies of the shallow lake facies of Jiamihe formation and the fan delta facies of the Fengcheng formation and the shallow lake facies of the middle and upper Permian. The area has experienced the fan delta, alluvial fan facies, the fan delta facies of the middle and upper Permian, and the shallow lake facies. The sedimentary center of the early Permian basin is located in the northwestern margin of the Kexia fault terrace, the middle Permian is located in the Mahu sag, and the late Permian is located in the basin Yijingxi sag. (4) the Permian tectonic evolution of Junggar Basin underwent the following stages: the peripheral Foreland basin stage of the Jiamihe formation, the Foreland basin stage of the Fengcheng formation combined with the Foreland basin stage of the middle Permian period, and the middle Permian Foreland basin stage. The stage of sustainable development and the extinction of Foreland basin from Foreland basin to depression basin during the depositional period of Upper Wuerhe formation.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13;P534.46

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本文編號(hào)：2336499