發(fā)布時(shí)間：2018-06-24 22:45

  本文選題：沉積相 + 巖相古地理　； 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：東北地區(qū)位于西伯利亞板塊與華北板塊之前,是由多個(gè)微板塊復(fù)合而成,該區(qū)構(gòu)造運(yùn)動(dòng)復(fù)雜,發(fā)育二連、海拉爾、松遼等多個(gè)沉積盆地,油氣資源豐富。侏羅紀(jì)是東北地區(qū)重要的構(gòu)造變革時(shí)期,本文以區(qū)域構(gòu)造演化為背景,以地層劃分與對比為基礎(chǔ),以沉積體系與沉積模式分析為核心,系統(tǒng)恢復(fù)東北地區(qū)侏羅系巖相古地理特征及其演化,查明控制烴源巖及有利生儲(chǔ)蓋組合的古地理?xiàng)l件,預(yù)測有利勘探區(qū)。東北地區(qū)早侏羅世主要沉積區(qū)位于二連盆地和虎林盆地,其中二連盆地為以斷陷湖盆沉積體系為特征的陸相盆地,大部分地區(qū)發(fā)育河流相,局部地區(qū)發(fā)育濱淺湖相;虎林盆地沉積了一套近海碎屑巖系,從邊緣到內(nèi)陸依次發(fā)育淺海陸棚相、海陸過渡相和河流相。中侏羅世,沉積中心向中西部遷移,虎林盆地遭受抬升剝蝕,松遼盆地區(qū)域性沉降接受沉積,主要沉積相類型為河流相和濱淺湖相;二連盆地沉積環(huán)境由早期河流相向中期濱淺湖相及晚期深湖-半深湖相演化;海拉爾盆地沉積了一套中酸性火山巖碎屑沉積。晚侏羅世,沉積中心向北部遷移,漠河盆地開始發(fā)育,并廣泛接受沉積,由內(nèi)部到邊緣依次發(fā)育沖積扇相、河流相及濱淺湖相;西部海拉爾盆地以沖積扇相和濱淺湖相為主;東部在海侵作用影響下,三江盆地和虎林盆地發(fā)育淺海陸棚相沉積體系。早侏羅世,受已形成的造山帶構(gòu)造方向及深斷裂控制作用,東北地區(qū)中部地勢較高并向東西逐漸降低,二連盆地和虎林盆地較為發(fā)育,其中二連盆地為典型的斷陷湖盆,由于海侵作用虎林盆地以淺海陸棚相為主。中侏羅世受伊澤奈尹板塊高速NNW向俯沖消減的影響,東北地區(qū)東部抬升,沉積中心向中西部遷移,在火山活動(dòng)的影響下,松遼盆地和海拉爾盆地開始發(fā)育,二連盆地沉積環(huán)境發(fā)生較大的變化;由于基底斷裂控制作用,大興安嶺西側(cè)發(fā)育拉布達(dá)林盆地和根河盆地。晚侏羅世蒙古-鄂霍次克洋全部關(guān)閉,形成東西-北東東向蒙古鄂霍次克褶皺帶,沉積中心向北遷移;受斷裂控制作用,發(fā)育大楊樹林盆地、伊春盆地和東河盆地等中小型弧后拉張裂陷盆地。綜合本區(qū)沉積相類型及巖相古地理?xiàng)l件,東北地區(qū)侏羅系油氣勘探目的層為二連盆地阿拉坦合力群、根河盆地與拉布達(dá)林盆地中侏羅統(tǒng)萬寶組,海拉爾盆地中、下侏羅統(tǒng)興安嶺群以及松遼盆地白城組。有利油氣勘探區(qū)帶分布于二連盆地阿南阿北凹陷、阿其圖烏拉凹陷、烏里雅斯太凹陷和賽罕塔拉凹陷,漠河盆地的二十二站、馬林、老溝、小北溝、興安鄉(xiāng)等地,海拉爾盆地的烏爾遜凹陷、貝爾凹陷、烏固諾爾斷陷內(nèi)以及根河盆地的額爾古納河?xùn)|側(cè)西烏珠爾、上護(hù)林、依力根一帶。
[Abstract]:The northeast area is located before the Siberian plate and the North China plate, which is composed of several microplates. The tectonic movement in this area is complicated and there are many sedimentary basins, such as Erlian, Hailaer, Songliao and so on, which are rich in oil and gas resources. Jurassic is an important period of tectonic transformation in Northeast China. This paper takes the regional tectonic evolution as the background, stratigraphic division and correlation as the basis, and the analysis of sedimentary system and sedimentary model as the core. The characteristics and evolution of Jurassic lithofacies and paleogeography in Northeast China are restored systematically. The paleogeographic conditions controlling hydrocarbon source rocks and favorable reservoirs and caprock assemblages are found and favorable exploration areas are predicted. The main sedimentary areas of early Jurassic in Northeast China are located in Erlian basin and Hulin basin. Erlian basin is a continental basin characterized by depositional system of faulted lacustrine basin. Fluvial facies is developed in most areas and shallow lacustrine facies is developed in local area. A set of offshore clastic rocks was deposited in the Hulin Basin, which developed shallow sea shelf facies, sea-land transitional facies and fluvial facies from the edge to the interior. In the Middle Jurassic, the sedimentary center moved to the central and western regions, the Hulin basin was uplifted and denuded, and the Songliao basin was deposited by regional subsidence. The main sedimentary facies were fluvial facies and shore-shallow lacustrine facies. The sedimentary environment of Erlian basin evolved from the early fluvial facies to the middle riparian facies and the late deep lacustry-semi-deep lacustrine facies, and a set of intermediate acid volcanic clastic deposits were deposited in the Hailaer basin. In the late Jurassic, the sedimentary center moved to the north, Mohe basin began to develop, and it was widely accepted that alluvial fan facies, fluvial facies and shore-shallow lacustrine facies were developed from the interior to the margin, and the western Hailaer basin was dominated by alluvial fan facies and shore-shallow lacustrine facies. Under the influence of transgression, shallow-sea shelf facies sedimentary systems were developed in Sanjiang basin and Hulin basin in the east of China. In the early Jurassic, controlled by the tectonic direction of the orogenic belt and the deep fault, the central topography of northeast China gradually decreased, and the Erlian basin and the Hulin basin developed, among which the Erlian basin was a typical faulted lacustrine basin, and the Erlian basin was a typical fault-lacustrine basin. Due to transgression, the Hulin basin is dominated by shallow-sea shelf facies. The Middle Jurassic was affected by the high speed NNW subduction of the Izenai plate, the eastern part of Northeast China was uplifted and the sedimentary center migrated to the central and western regions. Under the influence of volcanic activity, the Songliao basin and the Hailar basin began to develop. The sedimentary environment of Erlian basin has changed greatly and the west side of Daxingan Mountains has developed Labudalin basin and Genhe basin due to the control of basement faults. The late Jurassic Mongolia-Okhotsk ocean was completely closed, forming the East-NE Mongolia Okhotsk fold belt, the sedimentary center moved northward, and the poplar forest basin was developed under the control of the fault. Yichun basin and Donghe basin, etc. Based on the sedimentary facies types and lithofacies paleogeographic conditions in this area, the target layers of Jurassic oil and gas exploration in Northeast China are Alatan Heye Group in Erlian Basin, Wanbao formation of Middle Jurassic in Genhe Basin and Labudalin Basin, and Hailaer Basin in Hailaer Basin. Lower Jurassic Xinganling Group and Baicheng formation in Songliao Basin. The favorable oil and gas exploration zones are distributed in Erlian basin, Anan Abei sag, Achituwula sag, Wuliastai sag and Saihantara sag, 22 stations in Mohe basin, Ma Lin, Laogou, Xiaobei gully, Xinganxiang, etc. Wuerxun sag, Bell sag, Wukunol fault depression in the Hailaer basin and Xiwu Zhuer in the east side of the Erguna River in the Genhe basin, upper forest protection, Yiligen area.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13;P534.52

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本文編號(hào)：2063315