本文選題：亞諾斯盆地 + 卡沃內(nèi)拉組　； 參考：《成都理工大學》2015年碩士論文

【摘要】：本次研究研究區(qū)為哥倫比亞亞諾斯盆地,位于南美板塊北部。研究目的層為新生界卡沃內(nèi)拉組(Carbonera)。在亞諾斯盆地的沉積構(gòu)造背景基礎(chǔ)上,以鉆井和地震資料為基礎(chǔ),以構(gòu)造學、沉積學、層序地層學和地震地層學為指導,研究目的層的巖石類型、沉積環(huán)境、層序地層等。利用測井和地震資料來識別層序界面,確定層序格架,在此基礎(chǔ)上研究目的層的沉積相展布、沉積環(huán)境及層序發(fā)育的控制因素�？偨Y(jié)歸納前人資料和成果,結(jié)合現(xiàn)有資料,研究認為亞諾斯盆地的形成演化大體經(jīng)歷了五個階段:寒武紀-二疊紀被動大陸邊緣階段、三疊紀-白堊紀(中科迪勒拉)弧后裂谷演化階段、古新世-早始新世早前陸盆地階段、中始新世-早中新世前安第斯期前陸盆地階段、中中新世-現(xiàn)今安第斯期前陸盆地階段。在區(qū)域背景的基礎(chǔ)上,通過巖芯觀察,識別巖性組合、沉積構(gòu)造、生物組合等相標志,并結(jié)合地震相研究。在亞諾斯盆地卡沃內(nèi)拉組(Carbonera)中可識別出三角洲、陸棚2類沉積相,其中三角洲發(fā)育三角洲前緣及前三角洲2個亞相,陸棚則發(fā)育內(nèi)陸棚1個沉積亞相。三角洲前緣主要發(fā)育在C1、C3、C5及C7組,可進一步識別出水下分流河道和水下分流河道間2個微相;前三角洲主要發(fā)育在C2、C4、C6及C8組,可進一步識別出砂質(zhì)沉積為主的席狀砂和以泥質(zhì)沉積為主的前三角洲泥2個微相;陸棚主要發(fā)育在C2、C4、C6及C8,可識別出陸棚泥和席狀砂2個微相�；跇�(gòu)造背景和基礎(chǔ)地質(zhì)資料,結(jié)合研究區(qū)巖電性等沉積方面的資料綜合分析,可以在卡沃內(nèi)拉組(Carbonera)中可識別出4個三級層序(SQ1~SQ4);三級層序內(nèi)部的最大海泛面將每個三級層序劃分出海侵體系域(TST)和高水位體系域(HST),研究區(qū)缺失低水位體系域(LST)。通過對亞諾斯盆地鉆井及連井地震剖面上卡沃內(nèi)拉(Carbonera)組8個體系域沉積相和地震相對比,確立了研究區(qū)主要沉積相類型的地震相特征。共劃分出3個沉積相單元,對應(yīng)劃分出的地震相單元8個。在井震結(jié)合基礎(chǔ)上建立了三級層序及其體系域格架,并編制了8幅沉積相平面圖。分析沉積模式,編制出盆地的沉積模式圖。研究層序發(fā)育控制因素,得出構(gòu)造運動和海平面升降是三級層序及其內(nèi)部體系域形成的主要控制因素。
[Abstract]:The study area is the Yanos Basin in Colombia, located in the northern part of the South American Plate.The aim of the study is the Carbonella formation of the Cenozoic Kavonella formation.On the basis of sedimentary tectonic background of Yanos basin, based on drilling and seismic data, and guided by tectonics, sedimentology, sequence stratigraphy and seismostratigraphy, the rock types, sedimentary environments and sequence stratigraphy of the target layers are studied.The sequence interface is identified by logging and seismic data, and the sequence framework is determined. On this basis, the distribution of sedimentary facies, sedimentary environment and controlling factors of sequence development of the target layer are studied.Summing up and summarizing the previous data and achievements, combining with the existing data, it is considered that the formation and evolution of the Yanos basin has generally undergone five stages: the Cambrian-Permian passive continental margin stage.Triassic to Cretaceous (Middle Cretaceous) back-arc rift evolution stage, Paleocene to early Eocene early continental basin stage, Miocene to early Miocene to early Miocene preAndean Foreland basin stage,Miocene-present Andes Foreland basin stage.Based on the regional background, the lithologic assemblage, sedimentary structure and biological assemblage are identified by core observation, and the seismic facies are studied.Two types of sedimentary facies, delta and shelf, can be identified in Carbonella formation of Yanos basin. Two subfacies of delta front and prodelta are developed in delta, and one sedimentary subfacies in continental shelf is developed in continental shelf.The delta front developed mainly in the C1C3C5 and C7 groups, which could further identify the two microfacies between the underwater distributary channel and the underwater distributary channel, and the predelta mainly developed in the C2C4C4C6 and C8 groups.Two microfacies of sheet sand and pre-delta mud, which are mainly composed of sandy sediments, and two microfacies, mainly developed in C _ 2N _ 4C _ 6 and C _ 8, can be identified.Based on the tectonic background and basic geological data, combined with the comprehensive analysis of sedimentary data such as rock electricity in the study area,Four third-order sequences SQ1 / SQ4 can be identified in Carbonella formation, and each tertiary sequence can be divided into transgressive system tracts (TSTs) and high water level system tracts (HSTs) by the maximum sea panorama within the third-order sequences, and the lack of low water level system tracts (LSTs) in the study area.The seismic facies characteristics of the main sedimentary facies types in the study area are established by comparing the sedimentary facies of 8 system tracts and seismic facies of the Carbonera formation on the seismic profile of the Yanos basin and the Lianjing seismic section.Three sedimentary facies units were divided into 8 seismic facies units.Based on the combination of well and earthquake, the third order sequence and its system tract framework are established, and 8 sedimentary facies plans are compiled.The sedimentary model of the basin is analyzed and the sedimentary model map of the basin is worked out.By studying the controlling factors of sequence development, it is concluded that tectonic movement and sea level rise and fall are the main controlling factors for the formation of tertiary sequence and its internal system tracts.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13;P539.2

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