本文選題：大興安嶺　切入點(diǎn)：深地震反射剖面　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】：深地震反射剖面技術(shù)是全球公認(rèn)的揭露地殼精細(xì)結(jié)構(gòu)的先鋒技術(shù),此技術(shù)可為揭示出造山帶或盆山結(jié)合帶的地殼精細(xì)結(jié)構(gòu),發(fā)現(xiàn)了推覆體下逆掩的沉積構(gòu)造,確定造山帶逆沖變形深度與前陸帶發(fā)育程度、規(guī)模,從地殼尺度把握盆山深部構(gòu)造與油氣儲(chǔ)存、運(yùn)移關(guān)系提供可靠依據(jù)。論文通過(guò)對(duì)深地震反射剖面資料采集及常規(guī)處理技術(shù)開(kāi)展研究及應(yīng)用,在常規(guī)地震采集與深地震采集進(jìn)行了對(duì)比研究的基礎(chǔ)上,針對(duì)深地震采集需要大排列、大偏移距、接收時(shí)間長(zhǎng)、激發(fā)條件差、成井難度大、信噪比低等特點(diǎn),形成了適合大興安嶺深地震數(shù)據(jù)采集的激發(fā)、接收技術(shù)方法,獲得了層次豐富、信噪比高的地震資料;開(kāi)展了針對(duì)大興安嶺深地震資料采用彎線施工、測(cè)線長(zhǎng)、地表起伏大、低速帶變化快的處理方法研究,采用混合靜校正、多種去噪手段,對(duì)最重要的兩個(gè)指標(biāo)--信噪比與分辨率進(jìn)行了重點(diǎn)分析與處理方法測(cè)試,獲得了優(yōu)質(zhì)的深地震剖面,為地殼和盆地結(jié)構(gòu)研究提供了良好的基礎(chǔ)資料。
[Abstract]:Deep seismic reflection profile is a globally recognized pioneering technique for exposing the fine structure of the crust. This technique can be used to reveal the crustal fine structure of orogenic belts or basin-mountain conjunctions, and to find sedimentary structures beneath the nappe. The depth of thrusting deformation and the development degree and scale of Foreland belt are determined, and the deep structure and oil and gas storage of basin and mountain are grasped from the crustal scale. Through the research and application of deep seismic reflection profile data acquisition and conventional processing technology, on the basis of comparative study between conventional seismic acquisition and deep seismic acquisition, In view of the characteristics of deep seismic acquisition, such as large arrangement, large offset, long receiving time, poor excitation condition, difficult well completion and low signal-to-noise ratio, a method of excitation and receiving is formed, which is suitable for deep seismic data acquisition in Daxing'an Mountains. The seismic data with rich layers and high signal-to-noise ratio are obtained, and the processing methods for deep seismic data in Daxing'anling are studied, such as curved line construction, long surveying line, large surface fluctuation, fast change of low speed zone, and mixed static correction. In this paper, the two most important indexes, signal-to-noise ratio (SNR) and resolution resolution, are analyzed and tested by various denoising methods, and the high quality deep seismic profile is obtained, which provides good basic data for the study of crustal and basin structure.
【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)】：P631.4

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