本文選題：通南巴背斜 + 構(gòu)造幾何學(xué)運(yùn)動(dòng)學(xué)��； 參考：《中國(guó)地質(zhì)大學(xué)(北京)》2015年碩士論文

【摘要】：通南巴背斜地理上處于四川省東北緣,地處通江縣、南江縣與巴中市之間,大地構(gòu)造上既處于上揚(yáng)子板塊北緣與南秦嶺板塊交接部位,亦屬于川東北米倉(cāng)山—大巴山前陸盆地的一部分,其構(gòu)造形成與演化主要受控于米倉(cāng)山與大巴山兩大造山帶的影響。研究通南巴背斜既對(duì)揭示川東北盆山耦合關(guān)系,構(gòu)造疊加以及陸內(nèi)變形作用具有重要科學(xué)意義,亦對(duì)勘探程度相對(duì)較低川東北地區(qū)具有實(shí)際的油氣勘探指導(dǎo)意義。本論文利用四川盆地東北部最新的二維及三維地震剖面及鉆井資料,并結(jié)合野外資料等證據(jù),通過(guò)研究通南巴背斜幾何學(xué)、運(yùn)動(dòng)學(xué)特征,建立精細(xì)的通南巴背斜幾何學(xué),運(yùn)動(dòng)學(xué)模型;并且通過(guò)區(qū)域構(gòu)造長(zhǎng)剖面的分析與磷灰石裂變徑跡熱模擬分析,探討米倉(cāng)山與大巴山對(duì)通南巴背斜的形成與演化的影響。最后通過(guò)構(gòu)造三維復(fù)原的分析與應(yīng)用,討論通南巴背斜構(gòu)造對(duì)油氣成藏的控制。此次研究主要取得以下幾點(diǎn)認(rèn)識(shí)與結(jié)論:(1)通南巴背斜主體NE向構(gòu)造平面上分為三段,從西南段向北東段構(gòu)造樣式由斷層轉(zhuǎn)折褶皺與被突破的斷層傳播褶皺混合模型向構(gòu)造楔與前翼褶皺調(diào)節(jié)斷層的混合模型轉(zhuǎn)變;NW向構(gòu)造則受到來(lái)自大巴山的構(gòu)造疊加的影響,表現(xiàn)為分層疊加,上部為一系列NW向斷層與褶皺的疊加,下部為黑池梁地區(qū)疊瓦與雙重構(gòu)造的疊加。(2)研究區(qū)垂向上受控于三疊系嘉陵江—雷口坡組膏鹽滑脫層,志留系泥巖局部滑脫層和寒武系泥巖滑脫層,劃分為上、中、下、深4套構(gòu)造層,整體表現(xiàn)為多重滑脫變形系統(tǒng)特征,不同構(gòu)造層具有不同的構(gòu)造樣式與強(qiáng)度。其中,中部構(gòu)造層縮短率最大,構(gòu)造變形最為強(qiáng)烈,發(fā)育一系列次級(jí)褶皺和斷層,局部可見(jiàn)疊瓦和雙重構(gòu)造。(3)通南巴背斜的形成與演化受控于米倉(cāng)山以及大巴山方向的控制,表現(xiàn)為米倉(cāng)山方向的位移沿前震旦系滑脫層向盆地內(nèi)部傳遞,在米倉(cāng)山地區(qū)被大量吸收,表現(xiàn)為基底卷入式的大規(guī)模沖斷變形,位移繼續(xù)傳遞至通南巴地區(qū),導(dǎo)致通南巴地區(qū)褶皺變形。大巴山方向的位移主要沿三疊系嘉陵江組滑脫層向盆地傳遞,被上覆巖層逐漸吸收,形成一系列NW向褶皺以及斷層,基底未卷入變形。(4)通南巴背斜在須家河組—下侏羅統(tǒng)沉積時(shí)期已經(jīng)形成雛形,在晚侏羅世受米倉(cāng)山大規(guī)模沖斷影響,通南巴背斜NE向構(gòu)造基本成型。早白堊世晚期—晚白堊世早期,受米倉(cāng)山背馱式?jīng)_斷構(gòu)造向東南傳遞的影響,通南巴背斜的NE向構(gòu)造基本定型,在新生代晚期,受青藏高原構(gòu)造活動(dòng)影響,通南巴背斜的NE向構(gòu)造最終定型。另外一方面,在晚白堊世和晚中新世,分別受大巴山方向的逆沖推覆影響,前后導(dǎo)致一系列疊瓦構(gòu)造以及NW向褶皺以及斷層的形成。(5)利用Gocad對(duì)多個(gè)層位的三維構(gòu)造復(fù)原分析,通南巴背斜河壩場(chǎng)高點(diǎn),背斜兩翼地區(qū),以及馬路背構(gòu)造東北斜坡主要分布較高的應(yīng)變(Dilatation呈正值),形態(tài)上呈片或呈帶分布,表明這些局部地區(qū)為構(gòu)造應(yīng)力相對(duì)集中的區(qū)域,也是潛在呈規(guī)模的斷裂帶發(fā)育的地區(qū)。結(jié)合儲(chǔ)層發(fā)育特征,預(yù)測(cè)通南巴背斜馬路背構(gòu)造東北斜坡—黑池梁地區(qū)上二疊統(tǒng)長(zhǎng)興組為最有利的油氣勘探區(qū)帶。
[Abstract]:Tongnanba anticline is geographically located in the northeastern edge of Sichuan Province, located in Tongjiang, Nanjiang county and Bazhong city. The geodetic tectonics is not only in the junction of the northern margin of the upper Yangtze plate and the southern Qinling Mountains plate, but also part of the Tongjiang Daba foreland basin in Northeast Sichuan. Its formation and evolution are mainly controlled by the two major areas of the rice Cangshan and Daba Mountains. The study of the Tongnan Ba anticline is of great scientific significance not only to the revelation of the coupling relationship between the basin and mountain in the northeast of Sichuan, the tectonic superposition and the internal deformation of the land, but also to the practical oil and gas exploration in the northeast of Sichuan Province. The latest two-dimensional and three-dimensional seismic profiles in the northeast of Sichuan basin are used in this paper. With the drilling data and the field data and other evidence, through the study of the geometry and kinematics of Tongnan Ba anticline, the fine Tongnan Ba anticline geometry and kinematics model are established, and the formation and performance of the Tongnan Ba anticline in Cangshan and Daba Mountains is discussed through the analysis of the long section of the regional structure and the thermal simulation of the apatite fissure trail. Finally, through the analysis and application of three dimensional restoration, the control of oil and gas accumulation in the Tongnan Ba anticline structure is discussed. The main results are as follows: (1) the main NE of the Tongnan Ba anticline is divided into three segments, and the tectonic style from the south-west to the North East Section is from fault turning fold and breakthroughs The mixed model of layer propagation folds is transformed into a mixed model of structural wedge and front wing fold adjustment fault; the NW direction structure is influenced by the superposition of the tectonic superposition from Daba Mountain. The superposition is stratified, the upper part is the superposition of a series of NW faults and folds, the lower is the superposition of the superposition and double structure in the black pool beam area. (2) the study area is vertically up. In the Triassic Jialingjiang Lei Kou slope formation, the gypsum slipping layer, the Silurian mudstone local slipping layer and the Cambrian mudstone slide layer are divided into 4 sets of upper, middle, lower and deep tectonic layers, which are characterized by multiple detachment and deformation system, and the different tectonic layers have different structural styles and strength. Among them, the shortening rate of the middle tectonic layer is the largest and the structural deformation is the most. The formation and evolution of the Tongnan Ba anticline are controlled by the direction of M Cangshan and Daba Mountains. (3) the displacement of the rice Cangshan direction is transmitted along the slip layer of the former Sinian system to the basin, which is absorbed in a large amount in the m Cangshan area and is shown as the basement. The draping deformation of the involvement type, which continues to pass to the Tongnan Ba region, leads to the fold deformation of Tongnan Ba area. The direction of the Daba Mountain is mainly transferred along the Triassic Jialingjiang formation slide to the basin, and gradually absorbed by the overlying strata, forming a series of NW folds and fault layers, and the basement has not been involved in the deformation. (4) Tongnan Ba anticline is required. The period of the sedimentary period of the Jiahe formation and lower Jurassic has formed a prototype. In the late Jurassic, it was affected by the large-scale thrust of the rice Cangshan. The Tongnan Ba anticline was formed basically. The early Cretaceous late Late Cretaceous, influenced by the transport of the thrust structure of the rice Cangshan back in the early Late Cretaceous, the structure of the NE trending structure of the Tongnan Ba anticline was basically established, in the late Cenozoic era. Due to the tectonic activity of the Qinghai Tibet Plateau, the NE structure of the Tongnan Ba anticline is finalized. On the other hand, in the late Cretaceous and late Miocene, a series of imbricate structures, NW folds and the formation of faults are caused by the thrust and nappe of Dabashan direction respectively. (5) the reconstruction of the three-dimensional structure of multiple layers by Gocad is used. Analysis, the high point of the dam field of the Tongnan Ba anticline, the two wing areas of the anticline and the northeast slope of the back of the road are mainly distributed in the area of Dilatation, which shows that the local areas are relatively concentrated areas of tectonic stress, and are also developed in the scale of the fault zone. It is predicted that the upper two Permian Changxin formation is the most favorable oil and gas exploration zone in the northeast slope of the Tongnan Ba anticline and the northeast slope.

【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】：2015
【分類號(hào)】：P618.13

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