【摘要】：準(zhǔn)噶爾盈地南緣地區(qū)是新疆油田公司油氣勘探的重要接替領(lǐng)域之一,前期已經(jīng)發(fā)現(xiàn)了獨(dú)山子油田、卡因迪克油田、呼圖壁氣田、瑪河氣田等多個(gè)油氣田及霍爾果斯背斜、吐谷魯背斜、安集海背斜、西湖背斜等多個(gè)含油氣構(gòu)造,油氣資源豐富。準(zhǔn)南緣地區(qū)有利目標(biāo)基本上都屬于山前復(fù)雜構(gòu)造,普遍具有地表和地下雙重復(fù)雜的特征,地震資料品質(zhì)較低,利用地震速度建場后時(shí)深轉(zhuǎn)換得到的構(gòu)造圖精度較低。對前期失利的探井分析后認(rèn)為,構(gòu)造落實(shí)是制約該區(qū)油氣發(fā)現(xiàn)的重要因素,其中時(shí)深轉(zhuǎn)換環(huán)節(jié)更是制約構(gòu)造圖精度的技術(shù)瓶頸。本次研究在分析準(zhǔn)南緣地區(qū)時(shí)深轉(zhuǎn)換方法的基礎(chǔ)上,理清了山前復(fù)雜構(gòu)造成圖的問題和不足,進(jìn)行了準(zhǔn)南緣區(qū)域地震速度建場和變速成圖方法研究,以南緣東部地區(qū)古牧地三維和長山1三維為精細(xì)目標(biāo)落實(shí)的研究靶區(qū),從資料處理、地震資料解釋、時(shí)深轉(zhuǎn)換方法研究等方面進(jìn)行了系統(tǒng)研究,初步總結(jié)出一套適用于準(zhǔn)南緣區(qū)域和有利目標(biāo)的較高精度的時(shí)深轉(zhuǎn)換方法。本次研究依托科研生產(chǎn)項(xiàng)目,分別針對地震疊前時(shí)間偏移資料、地震疊前深度偏移資料的特點(diǎn)出發(fā),初步形成的構(gòu)造落實(shí)技術(shù)：1、區(qū)域鉆井速度分析方法；2、區(qū)域地震速度建場及變速成圖方法；3、復(fù)雜構(gòu)造高分辨率處理和解釋技術(shù)；4、復(fù)雜構(gòu)造精細(xì)速度建模技術(shù)。這些技術(shù)在南緣區(qū)域和古牧地三維區(qū)進(jìn)行了應(yīng)用,取得了良好的應(yīng)用效果。通過本次研究,在準(zhǔn)南緣區(qū)域進(jìn)行了速度成圖方法研究,在精細(xì)速度研究的靶區(qū)——古牧地三維和長山1三維區(qū)提出多個(gè)鉆探目標(biāo)建議并獲得采納,其中多口鉆井獲得油氣發(fā)現(xiàn)和良好的油氣顯示,拓展了準(zhǔn)南緣東部復(fù)雜構(gòu)造的油氣勘探成果。通過實(shí)鉆井驗(yàn)證,采用本次研究中的技術(shù)方法能夠有效提高復(fù)雜構(gòu)造的時(shí)深轉(zhuǎn)換精度,在古牧地三維和長山1三維區(qū)鉆井在目的層的實(shí)鉆分層與設(shè)計(jì)分層誤差基本上均小于1.5%。總結(jié)在古牧地三維和長山1三維的成功應(yīng)用經(jīng)驗(yàn),本次研究中取得的技術(shù)成果具有較強(qiáng)的現(xiàn)實(shí)推廣意義,為準(zhǔn)南緣區(qū)域范圍內(nèi)其他復(fù)雜構(gòu)造的準(zhǔn)確落實(shí)提供較好的技術(shù)參考。
[Abstract]:The southern margin of Yingdi, Junggar, is one of the important replacement fields for oil and gas exploration in Xinjiang Oilfield Company. Several oil and gas fields, such as Dushanzi Oilfield, Caindik Oilfield, Hutubi Gas Field, Mahe Gas Field, and Holgos anticline, have been discovered in the early stage. Tukulu anticline, Anjihai anticline and Xihu anticline are rich in oil and gas resources. The favorable targets in the quasi-southern margin area are basically complex structures in front of mountains, which generally have the characteristics of surface and underground complexity, the quality of seismic data is low, and the accuracy of the structural map obtained by time-depth conversion after seismic velocity field building is low. It is considered that the structural implementation is an important factor restricting the discovery of oil and gas in this area, and the time-depth conversion is the technical bottleneck restricting the accuracy of the structural map. Based on the analysis of time-depth conversion method in the quasi-southern margin region, the problems and shortcomings of mapping complex structures in front of mountains are clarified, and the methods of seismic velocity field construction and variable velocity mapping in the quasi-southern margin region are studied. Based on the three dimensions of paleopastoral land in the eastern part of the southern margin and the three dimensions of Changshan 1 as the research targets for the implementation of the fine target, this paper makes a systematic study on the data processing, seismic data interpretation, time-depth conversion method and so on. A set of high precision time-depth conversion methods suitable for quasi-southern margin region and favorable target are summarized. According to the characteristics of seismic prestack time migration data and seismic prestack depth migration data, the preliminary structural implementation technology: 1, regional drilling velocity analysis method is developed in this study based on scientific research and production projects. 2. Regional seismic velocity field building and variable-velocity mapping method, complex structure high-resolution processing and interpretation technology, complex structure precision velocity modeling technology. These techniques have been applied in the southern margin region and the three-dimensional area of ancient pastoral land, and good results have been obtained. Through this study, velocity mapping method was carried out in the area of the quasi-southern margin. Several suggestions for drilling targets were put forward and adopted in the target areas of the fine velocity study, namely, the three dimension of ancient pastoral land and the three dimensional area of Changshan 1. Oil and gas discovery and good oil and gas display have been obtained from many drilling wells, which extend the oil and gas exploration results of complex structures in the eastern part of the quasi-southern margin. Through the verification of real drilling, the accuracy of time-depth conversion of complex structures can be effectively improved by using the technical method in this study. The errors of solid drilling stratification and design stratification in the three dimensional zones of ancient pastoral land and Changshan 1 are basically less than 1.5. The successful application experience in the three dimensions of ancient pastoral land and Changshan 1 is summarized. The technical achievements obtained in this study have a strong practical significance and provide a better technical reference for the accurate implementation of other complex structures in the area of the quasi southern margin.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：P618.13

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