本文選題：塔里木盆地西南地區(qū) + 白堊系��； 參考：《成都理工大學》2017年碩士論文

【摘要】：本文研究區(qū)位于塔里木盆地西南地區(qū),包括喀什坳陷、莎車隆起、葉城-和田坳陷及麥蓋提斜坡等四個二級構造單元。研究的目的層為白堊系,包括克孜勒蘇群和英吉沙群。根據(jù)論文研究內容,以多學科理論為指導,結合國內外碳酸鹽巖及層序地層研究現(xiàn)狀,在仔細分析薄片、巖芯、鉆井、測井、地球化學和地球物理資料的基礎上,深入研究目的層的巖石類型、沉積環(huán)境、層序地層的關系,分析出塔西南地區(qū)白堊系地層有利儲集相帶。影響塔西南地區(qū)白堊系地層的構造運動主要是燕山中期、燕山晚期、喜山早期運動,喜山運動中-晚期發(fā)生在古近紀漸新世末期。位于新特提斯洋北緣歐亞大陸南部東緣的塔西南,白堊系下統(tǒng)繼承性發(fā)育與侏羅系類似的陸相沉積。受同期全球海平面整體上升時期大規(guī)模海侵影響,塔西南白堊系上統(tǒng)—古近系始新統(tǒng)烏拉根組主要發(fā)育海相沉積。塔西南白堊系海相沉積發(fā)育有障壁濱岸以及受海水鹽度控制的開闊臺地和蒸發(fā)臺地沉積體系,陸相沉積發(fā)育沖積扇—扇三角洲—湖泊沉積體系。以層序地層學為理論基礎,結合研究區(qū)沉積背景、巖石地層、地震地層綜合分析,塔西南地區(qū)白堊系共識別出二級層序2個:SSQ1,SSQ2,三級層序3個:KSQ1-KSQ3。在過井剖面和地震相研究的基礎上,進行層序格架內沉積相展布及其主控因素研究,確立研究區(qū)層序沉積演化模式。最終編制沉積相平面圖,并揭示沉積相展布規(guī)律。塔西南白堊系層序形成主控要素有構造沉降、海平面變化及古氣候條件。構造運動對層序的控制主要表現(xiàn)在對層序界面和對沉積古地貌的影響;海平面的升降控制著三級層序界面的形成與層序內部體系域的演化;古氣候的變化則影響著碳酸鹽巖臺地類型和臺緣位置的變遷。綜合層序、沉積、儲層特征分析認為,塔西南白堊系主要有利儲集相帶為白堊系下統(tǒng)SSQ1(克孜勒蘇群)有利儲集相帶主要為扇三角洲相平原(沖積扇扇緣)及扇三角洲前緣細砂巖、粉砂巖;白堊系上統(tǒng)KSQ3(依格孜牙組)有利儲集相帶主要為開闊臺地臺內灘顆�；�?guī)r、云巖及垮塌云質灰質角礫巖。儲集空間以粒間(溶)孔、粒內(溶)孔及鑄模孔、生物骨架孔和晶間(溶)孔等次生孔隙為主。
[Abstract]:The study area is located in the southwest of Tarim Basin and consists of four secondary tectonic units: Kashi depression, Shaqa uplift, Yecheng-Hetian depression and Maigeti slope. The target layer of the study is the Cretaceous system, including the Kezilesu Group and the Ingisha Group. According to the contents of this paper, guided by the multidisciplinary theory, combined with the present research situation of carbonate rock and sequence stratigraphy at home and abroad, on the basis of careful analysis of thin slice, core, drilling, logging, geochemistry and geophysical data, The relationship among the rock types, sedimentary environments and sequence stratigraphy of the target strata is studied, and the favorable reservoir facies zones of the Cretaceous strata in the southwest of the Tarim Basin are analyzed. The tectonic movements that affect the Cretaceous strata in southwest Tarim are mainly the middle Yanshanian late Yanshanian early Himalayan and mid-late Himalayan movements which occurred at the end of the Oligocene Paleogene. Located in the southwest of Tarim on the eastern edge of the Eurasian continent in the northern margin of the New Tethys Ocean, the lower Cretaceous inherited deposits similar to the Jurassic. Under the influence of large-scale transgression during the global sea-level rise period, marine deposits were mainly developed in the Cretaceous to Paleogene Eocene Ulagen formation in southwest Tarim. The marine sediments of Cretaceous in southwest of Tarim have barrier shoreline, open platform and evaporation platform controlled by seawater salinity, and alluvial fan fan delta lacustrine sedimentary system. On the basis of sequence stratigraphy, combined with sedimentary background, lithostratigraphy and seismic stratigraphy in the study area, the Cretaceous series in southwest Tarim area identified two second-order sequences (2: SSQ1 / SSQ2) and three third-order sequences (3: KSQ1-KSQ3). Based on the study of cross well profile and seismic facies, the distribution of sedimentary facies in sequence framework and its main controlling factors are studied, and the evolution model of sequence deposition in the studied area is established. Finally, the sedimentary facies plane map is compiled, and the distribution law of sedimentary facies is revealed. The main factors controlling the formation of Cretaceous sequence in southwest of Tarim Basin are tectonic subsidence, sea level change and paleoclimate conditions. The influence of tectonic movement on sequence interface and sedimentary paleogeomorphology, the rise and fall of sea level control the formation of third-order sequence interface and the evolution of internal system tract of sequence. Paleoclimate change affects carbonate platform type and the change of platform margin position. Comprehensive sequence, sedimentary and reservoir characteristics analysis, The main favorable reservoir facies belt of Cretaceous in southwest of Tarim is SSQ1 (Kizilesu group) favorable reservoir facies belt of Cretaceous, mainly fan delta facies plain (alluvial fan margin) and fan delta front fine sandstone, siltstone; The favorable reservoir facies belt of the Upper Cretaceous KSQ3 (Igariziya formation) is mainly composed of flat granular limestone, dolomite and collapsing dolomitic breccia in the open platform. The reservoir space is mainly composed of intergranular (dissolved) pore, intragranular (dissolved) pore and mold pore, biological skeleton pore and intergranular (dissolved) pore.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P618.13

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