發(fā)布時間：2018-05-12 18:34

  本文選題：塔河油田 + 中下奧陶統(tǒng)��； 參考：《中國地質(zhì)大學(xué)(北京)》2017年碩士論文

【摘要】：塔里木盆地斷裂系統(tǒng)對于碳酸鹽巖儲層形成具有重要意義,中下奧陶統(tǒng)鷹山組和蓬萊壩組是塔河油田最重要的勘探層位。本文以中下奧陶統(tǒng)鷹山組和蓬萊壩組為研究對象,以層序地層學(xué)、構(gòu)造地質(zhì)學(xué)等為理論指導(dǎo),以鉆測井、三維地震資料為基礎(chǔ),以地震屬性分析為主要技術(shù)手段,建立了一套塔河油田主干斷裂和層控斷裂發(fā)育模式,并對斷裂發(fā)育模式的各方要素進(jìn)行詳細(xì)分析。通過地質(zhì)和地震資料,對塔河油田中下奧陶統(tǒng)鷹山組、蓬萊壩組地層層序進(jìn)行精細(xì)解釋。將鷹山組分為鷹一段、鷹二段、鷹三段、鷹四段四個四級層序,蓬萊壩組分為蓬一段、蓬二段兩個四級層序。通過對相干體屬性、曲率屬性、傾斜角屬性等10多種地震屬性的分析和對比,認(rèn)為相干體屬性、曲率屬性的綜合識別能力最優(yōu)。論文以層序地層劃分、斷裂精細(xì)解釋為基礎(chǔ),對斷裂剖面和平面特征進(jìn)行研究。塔河油田中下奧陶統(tǒng)斷裂平面組合類型有平直狀、雁列狀、共軛狀等,并以大型共軛斷裂和平直狀斷裂為主。而斷裂的剖面構(gòu)造樣式主要分為花狀構(gòu)造和高陡斷裂構(gòu)造2大類,其中花狀構(gòu)造根據(jù)斷裂性質(zhì)和斷裂形態(tài)可進(jìn)一步分為7種亞類,高陡斷裂構(gòu)造根據(jù)切入地層情況可進(jìn)一步分為3種亞類。同時研究發(fā)現(xiàn),塔河油田斷裂具有“三分”特點,即分區(qū)性、分帶性、分段性。研究區(qū)有五個斷裂帶,東西向發(fā)育,以研究區(qū)中部最為集中。在同一斷裂帶的不同位置,斷距大小、構(gòu)造樣式等具有不同特征。在塔河油田斷裂系統(tǒng)整體認(rèn)識的基礎(chǔ)之上,建立塔河油田中下奧陶統(tǒng)主干斷裂和層控斷裂發(fā)育模式。剖面上層控斷裂的構(gòu)造樣式分為界面終止型和界面切入型兩大類。平面上層控斷裂由下至上發(fā)育密度逐漸增大,發(fā)育區(qū)由研究區(qū)中北部向中南部及東西部擴(kuò)散。通過對從層序界面、巖性、巖層厚度、應(yīng)力場等角度分析,鷹山組由下至上泥晶灰?guī)r含量逐漸增多,地層厚度逐漸變薄,蓬萊壩組白云巖含量較高但受到較大地層壓力。研究發(fā)現(xiàn)層控斷裂發(fā)育強(qiáng)度與應(yīng)力場強(qiáng)度、白云巖及泥晶灰?guī)r含量成正比,與巖層厚度成反比。
[Abstract]:The fault system of Tarim Basin is of great significance to the formation of carbonate reservoir. Yingshan formation and Penglai Ba formation of middle and lower Ordovician are the most important exploration horizon in Tahe Oilfield. This paper takes Yingshan formation and Penglai Dam formation of middle and lower Ordovician as research objects, takes sequence stratigraphy and tectonic geology as theoretical guidance, takes drilling logging and 3D seismic data as the basis, and takes seismic attribute analysis as the main technical means. A set of development models of main faults and stratabound faults in Tahe Oilfield are established, and the elements of fault development model are analyzed in detail. Through geological and seismic data, the stratigraphic sequence of Yingshan formation and Penglai dam formation of middle and lower Ordovician in Tahe oilfield is interpreted in detail. The Yingshan formation is divided into four sequences: the first member, the second member, the third member and the fourth member of the fourth member, while the Penglai formation is divided into two four sequences. Through the analysis and comparison of more than 10 seismic attributes, such as coherent volume attribute, curvature attribute and tilt angle attribute, it is concluded that the comprehensive recognition ability of coherent volume attribute and curvature attribute is the best. Based on sequence stratigraphic division and fine interpretation of faults, the fault profile and plane characteristics are studied in this paper. The plane assemblages of Middle and Lower Ordovician faults in Tahe Oilfield are flat, geese, conjugate, etc, and are dominated by large conjugate faults and flat straight faults. The structural styles of the section of the faults are mainly divided into flower structure and high steep fault structure, among which the flower structure can be further divided into 7 subtypes according to the fault nature and the fault morphology. High-steep fault structures can be further divided into three subtypes according to the tangent strata. At the same time, it is found that the fault in Tahe Oilfield has the characteristics of "three parts", namely zoning, zonation and segmentation. There are five fault zones in the study area, with the most concentrated in the middle of the study area. At different locations of the same fault zone, the size of fault distance and structural style have different characteristics. On the basis of the whole understanding of the fault system in Tahe Oilfield, the development models of the main faults and the stratabound faults of the middle and lower Ordovician in Tahe Oilfield are established. The structural styles of the upper section controlled faults can be divided into two types: the interfacial termination type and the interfacial intersecting type. The density of the upper-plane controlled fault increases gradually from the bottom to the top, and the developed area diffuses from the central to the north of the study area to the central to the south and the east to the west. From the point of view of sequence interface, lithology, lithologic thickness and stress field, it is found that the content of mudstone in Yingshan formation increases gradually from the bottom to the top, the formation thickness becomes thinner, and the dolomite content of Penglai dam formation is higher but subject to greater formation pressure. It is found that the development strength of stratabound faults is directly proportional to the stress field strength, dolomite and mudstone content, and inversely proportional to the thickness of the strata.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.13

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