本文關(guān)鍵詞： 走滑雙重構(gòu)造 成因機(jī)制 展布規(guī)律 油氣成藏 渤海海域　出處：《中國(guó)石油大學(xué)(華東)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：渤海海域新生代時(shí)期在地幔上涌、板塊碰撞等多動(dòng)力源的區(qū)域地質(zhì)背景影響下發(fā)育有復(fù)雜的斷裂系統(tǒng),加之NNE向郯廬斷裂帶與NWW向張家口-蓬萊、秦皇島-旅順斷裂帶新生代發(fā)生強(qiáng)烈的走滑活動(dòng),走滑雙重構(gòu)造等派生構(gòu)造十分發(fā)育,對(duì)其形成機(jī)制、展布規(guī)律的研究具有十分重要的意義,不僅能豐富構(gòu)造地質(zhì)學(xué)的理論體系,也能為人們研究和認(rèn)識(shí)走滑背景下盆地內(nèi)部結(jié)構(gòu)特征及其成因機(jī)制提供一個(gè)新的思路和方法。本文運(yùn)用渤海海域豐富的三維地震資料,綜合運(yùn)用相干切片識(shí)別法,地震剖面識(shí)別法,三維層面圖識(shí)別法,斷裂系統(tǒng)圖識(shí)別法,對(duì)渤海海域四個(gè)區(qū)塊發(fā)育的走滑雙重構(gòu)造進(jìn)行了系統(tǒng)識(shí)別,并運(yùn)用構(gòu)造物理模擬對(duì)比,斷層活動(dòng)性分析,平衡剖面法等方法,對(duì)走滑雙重構(gòu)造的發(fā)育演化機(jī)制進(jìn)行了討論,確定了渤海海域走滑雙重構(gòu)造的時(shí)空展布規(guī)律與發(fā)育類(lèi)型,并與具體的勘探實(shí)踐相結(jié)合,探討了走滑雙重構(gòu)造的石油地質(zhì)意義。渤海海域走滑雙重構(gòu)造成因機(jī)制復(fù)雜,類(lèi)型多樣,側(cè)接型走滑雙重構(gòu)造包括由遼中2號(hào)斷裂與遼東斷裂右旋左階形成的遼東凸起北段,由遼中1號(hào)斷裂與遼中2號(hào)斷裂右旋右階形成的遼中凹陷,由遼中1號(hào)分支斷裂右旋右階形成的金縣1-1構(gòu)造,由萊州東支分支斷裂右旋側(cè)接形成的墾利6-5構(gòu)造,由郯廬斷裂帶渤南段右旋右階形成的渤南走滑雙重構(gòu)造;平直帶位置的走滑雙重構(gòu)造包括由郯廬斷裂帶反向走滑帶形成的蓬萊9-3構(gòu)造;彎曲位置的走滑雙重構(gòu)造包括由沙北一號(hào)走滑彎曲部位形成的沙北一號(hào)構(gòu)造。渤海海域走滑雙重構(gòu)造的發(fā)育具有東多西少,新近紀(jì)多古近紀(jì)少,發(fā)育時(shí)間跨度大的特點(diǎn),不同規(guī)模,不同走向,不同成熟度的走滑雙重構(gòu)造特征各異。從渤海海域走滑雙重構(gòu)造的研究中可以得到5點(diǎn)啟示:(1)側(cè)接型走滑雙重構(gòu)造易于發(fā)育;(2)拉張走滑雙重構(gòu)造易于發(fā)育;(3)次級(jí)斷裂可以誘導(dǎo)主邊界斷裂發(fā)育形成走滑雙重構(gòu)造;(4)主邊界斷裂間距與走滑距離的比值對(duì)內(nèi)部構(gòu)造發(fā)育有重要影響;(5)次級(jí)斷裂并非里德?tīng)朢剪切。另外,擠壓走滑雙重構(gòu)造具有釋壓區(qū)斷裂油氣垂向輸導(dǎo)性好,增壓區(qū)斷裂側(cè)向封堵性強(qiáng)的特點(diǎn),拉張走滑雙重構(gòu)造易于形成持續(xù)沉降深洼的特點(diǎn),這些特征對(duì)油氣聚集成藏十分有利。
[Abstract]:Under the influence of the regional geological background of multiple power sources such as mantle upwelling, plate collision and so on, complex fault systems developed in the Bohai Sea during the Cenozoic period, in addition to the NNE to Tanlu fault zone and NWW to Zhangjiakou-Penglai. The Cenozoic strong strike-slip activities occurred in Qinhuangdao-Lushun fault zone, and the derived structures such as strike-slip double structures are well developed. It is of great significance to study the formation mechanism and distribution law of these structures. It can not only enrich the theoretical system of tectonic geology. It can also provide a new way of thinking and method for people to study and understand the internal structural characteristics and genetic mechanism of the basin under the background of strike-slip. This paper uses abundant three-dimensional seismic data in the Bohai Sea. By means of coherent slice recognition, seismic profile recognition, 3D stratigraphic recognition and fault system map recognition, the strike-slip dual structures developed in four blocks in Bohai Sea are systematically identified. The development and evolution mechanism of strike-slip dual structure is discussed by means of structural physical simulation correlation fault activity analysis and equilibrium profile method. The temporal and spatial distribution and development types of the strike-slip double structures in the Bohai Sea area are determined and combined with the specific exploration practice. The petroleum geological significance of strike-slip double structure is discussed. The formation mechanism of strike-slip double tectonics in Bohai Sea is complicated and the types are various. The lateral strike-slip double structure consists of the northern segment of Liaodong uplift formed by Liaozhong No. 2 fault and Liaodong fault right-handed left step, and the Liaozhong sag formed by right right step of Liaozhong No. 1 fault and Liaozhong No. 2 fault. The Jinxian 1-1 structure formed from the right-handed right step of Liaozhong No. 1 branch fault and the Kenli 6-5 structure formed by the right-lateral junction of the eastern branch fault of Laizhou. The Bonan strike-slip double structure formed from the right right step of the Bonan south segment of the Tanlu fault zone; The strike-slip double tectonics in the position of the flat straight zone include the Penglai 9-3 structure formed by the reverse strike-slip zone of the Tanlu fault zone. The strike-slip double structure in the bending position includes the Shabei No. 1 structure formed by the bend part of Shabei No. 1 strike slip. The development of the strike-slip double structure in Bohai Sea area has the characteristics of the east and the west, and the Neogene is less than that of the Paleogene. Development time span of the characteristics of large, different scales, different trends. The characteristics of strike-slip double tectonics in different maturity are different. From the study of strike-slip double tectonics in Bohai Sea area, we can get 5 inspirations: 1) the lateral strike-slip double structure is easy to develop; 2) the extensional strike-slip double structure is easy to develop; (3) the secondary faults can induce the development of the main boundary faults to form strike-slip double structures. (4) the ratio of the distance between main boundary faults and strike-slip distance has an important effect on the development of internal structures. In addition, the compression-strike-slip dual structure is characterized by good vertical oil and gas transport and strong lateral sealing in the pressurized zone. The extensional strike-slip double structure is easy to form the characteristics of continuous subsidence and deep depression, which is beneficial to the accumulation of oil and gas.
【學(xué)位授予單位】：中國(guó)石油大學(xué)(華東)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.13;P736.1

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