本文選題：正牽引構造　切入點：演化模式　出處：《高校地質學報》2017年01期

【摘要】：長期以來牽引構造被視為油氣勘探的重點領域,隨著構造沉積學的發(fā)展,同沉積逆牽引構造已經(jīng)取得了大量的進展,但是對正牽引構造的研究還比較少,使其成為了研究熱點。關于克-百斷裂帶的構造成因機制尚還存在爭論,與正牽引構造相關的物理模擬在國內尚未見報道。本文通過地震解釋資料描述了準噶爾盆地西北緣克-百斷裂帶正牽引構造的變形特征,結合應力場分析,討論了正牽引構造的成因機制;并設計物理模型對正牽引構造的形成演化進行了模擬,給出了克-百斷裂帶為擠壓成因的新論據(jù)。研究認為,克-百斷裂帶的正牽引構造是在印支期、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)育是正牽引構造產(chǎn)生的前提;隨著前沖斷層傾角變大,斷層活動性減弱,為斷層上盤地層收縮形成正牽引構造創(chuàng)造了條件。此次研究提出正牽引構造的形成演化模式分為三個階段: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,規(guī)模擴展階段;第三階段為繼承性同沉積階段。結合前人研究成果,認為同生逆斷層可作為油氣運移通道,但是正牽引構造的高部位并不一定是有利的油氣聚集區(qū);正牽引構造第一階段形成的底形控制了砂體的展布,在第二階段,構造低部位能形成巖性油氣藏;而正牽引構造發(fā)育的第三階段,可在構造高部位形成構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】： 中國石油勘探開發(fā)研究院;中國石油杭州地質研究院;中國石油大學(北京)地球科學學院;中國石油新疆油田分公司勘探開發(fā)研究院;
【基金】：國家自然科學基金項目(41372116) 中國石油集團科技重大專項(2014E-32-09)聯(lián)合資助
【分類號】：P618.13

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