本文選題：正牽引構(gòu)造　切入點(diǎn)：演化模式　出處：《高校地質(zhì)學(xué)報(bào)》2017年01期

【摘要】：長(zhǎng)期以來牽引構(gòu)造被視為油氣勘探的重點(diǎn)領(lǐng)域,隨著構(gòu)造沉積學(xué)的發(fā)展,同沉積逆牽引構(gòu)造已經(jīng)取得了大量的進(jìn)展,但是對(duì)正牽引構(gòu)造的研究還比較少,使其成為了研究熱點(diǎn)。關(guān)于克-百斷裂帶的構(gòu)造成因機(jī)制尚還存在爭(zhēng)論,與正牽引構(gòu)造相關(guān)的物理模擬在國(guó)內(nèi)尚未見報(bào)道。本文通過地震解釋資料描述了準(zhǔn)噶爾盆地西北緣克-百斷裂帶正牽引構(gòu)造的變形特征,結(jié)合應(yīng)力場(chǎng)分析,討論了正牽引構(gòu)造的成因機(jī)制;并設(shè)計(jì)物理模型對(duì)正牽引構(gòu)造的形成演化進(jìn)行了模擬,給出了克-百斷裂帶為擠壓成因的新論據(jù)。研究認(rèn)為,克-百斷裂帶的正牽引構(gòu)造是在印支期、燕山期擠壓推覆過程中形成的,屬于同生逆斷層體系;塑性地層的發(fā)育是正牽引構(gòu)造產(chǎn)生的前提;隨著前沖斷層傾角變大,斷層活動(dòng)性減弱,為斷層上盤地層收縮形成正牽引構(gòu)造創(chuàng)造了條件。此次研究提出正牽引構(gòu)造的形成演化模式分為三個(gè)階段:第一階段為褶皺軸面緊貼斷層面的雛形階段;第二階段為褶皺軸面旋轉(zhuǎn),規(guī)模擴(kuò)展階段;第三階段為繼承性同沉積階段。結(jié)合前人研究成果,認(rèn)為同生逆斷層可作為油氣運(yùn)移通道,但是正牽引構(gòu)造的高部位并不一定是有利的油氣聚集區(qū);正牽引構(gòu)造第一階段形成的底形控制了砂體的展布,在第二階段,構(gòu)造低部位能形成巖性油氣藏;而正牽引構(gòu)造發(fā)育的第三階段,可在構(gòu)造高部位形成構(gòu)造或地層圈閉油氣藏。
[Abstract]:Traction structure has been regarded as the key field of oil and gas exploration for a long time. With the development of tectonic sedimentology, a great deal of progress has been made in the same sedimentary reverse traction structure, but the research on positive traction structure is still relatively few. It has become a hot topic of study. There is still a debate about the tectonic mechanism of the Ke-Bai fault zone. The physical simulation related to the normal traction structure has not been reported in China. In this paper, the deformation characteristics of the normal traction structure in the Ke-Bai fault zone of the northwestern margin of Junggar Basin are described by seismic interpretation data, and the stress field analysis is combined. This paper discusses the genetic mechanism of the normal traction structure, designs a physical model to simulate the formation and evolution of the positive traction structure, and gives a new argument that the Ke-Bai fault zone is the cause of compression. The normal traction structure of the Ke-Bai fault zone was formed during the Indosinian and Yanshanian compressional nappe, which belongs to the syngenic reverse fault system. The development of plastic strata is the premise of the positive traction structure. The weakening of fault activity creates conditions for the formation of positive traction structure in the upper disk of the fault. This study suggests that the evolution model of positive traction structure can be divided into three stages: the first stage is the embryonic stage of the fold axial plane close to the fault plane; The second stage is the stage of fold axis rotation and the stage of scale expansion, the third stage is the stage of inheritance and deposition. Combined with the previous research results, it is considered that the syngenic reverse fault can be used as the migration channel of oil and gas. However, the high position of the positive traction structure is not necessarily a favorable oil and gas accumulation area, the bottom shape of the first stage of the positive traction structure controls the distribution of the sand body, and in the second stage, the low part of the structure can form lithologic reservoirs. In the third stage of the development of positive traction structure, structural or stratigraphic traps can be formed in the high part of the structure.
【作者單位】： 中國(guó)石油勘探開發(fā)研究院;中國(guó)石油杭州地質(zhì)研究院;中國(guó)石油大學(xué)(北京)地球科學(xué)學(xué)院;中國(guó)石油新疆油田分公司勘探開發(fā)研究院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41372116) 中國(guó)石油集團(tuán)科技重大專項(xiàng)(2014E-32-09)聯(lián)合資助
【分類號(hào)】：P618.13

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