發(fā)布時(shí)間：2018-02-09 16:33

  本文關(guān)鍵詞： 鄂爾多斯盆地西部 馬四段 沉積相 沉積模式　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文針對(duì)當(dāng)前鄂爾多斯西部地區(qū)馬家溝組四段碳酸鹽巖地層劃分、沉積微相和沉積相分布規(guī)律等方面的研究現(xiàn)狀和所存在的問題,以地層學(xué)、碳酸鹽巖巖石學(xué)、構(gòu)造地質(zhì)學(xué)以及沉積學(xué)理論為指導(dǎo),運(yùn)用野外和室內(nèi)、宏觀和微觀相結(jié)合的方法,以野外剖面和巖芯精細(xì)觀察描述、常規(guī)顯微薄片觀察及鑒定為基礎(chǔ),結(jié)合碳氧同位素地化分析數(shù)據(jù),對(duì)地層格架、沉積相劃分、相標(biāo)志、縱向沉積組合序列、平面分布規(guī)律進(jìn)行了深入研究。 在區(qū)域地質(zhì)背景、構(gòu)造作用史等地質(zhì)特征分析基礎(chǔ)上,進(jìn)行了巖性特征、測(cè)井曲線特征和古生物綜合分析,認(rèn)為研究區(qū)地層橫向上東西向呈現(xiàn)出中間厚兩邊薄的趨勢(shì),由南向北地層厚度具有逐漸增厚的趨勢(shì)。平面上研究區(qū)以棋探1-鄂19-余探1井為界,西部地層厚度平面分布規(guī)律性明顯,自東向西地層厚度具有明顯增厚趨勢(shì)。東部馬四段地層厚度平面上以定邊地區(qū)為高值區(qū),逐漸向四周變��； 系統(tǒng)總結(jié)了研究區(qū)馬家溝組馬四段沉積特征,將其劃分為碳酸鹽巖臺(tái)地與碳酸鹽巖緩坡兩種沉積相,并可進(jìn)一步細(xì)分為6個(gè)亞相帶和若干個(gè)微相。橫向上,自西向東為由海槽-深緩坡-淺緩坡組成的碳酸鹽巖緩坡相過渡為由淺灘-臺(tái)坪亞相組成的碳酸鹽巖臺(tái)地相。說明研究區(qū)沉積環(huán)境為自西向東水體逐漸變淺,水體能量逐漸增強(qiáng),中央古隆起以東再度減弱。馬四時(shí)研究區(qū)承襲了馬三時(shí)的古地貌,馬四時(shí)研究區(qū)水體有所加深,因此沉積物巖性以灰質(zhì)白云巖以及灰?guī)r為主。隨著海侵過程進(jìn)一步擴(kuò)大,海水的入侵方向與早期入侵方向一致,臺(tái)坪面積具有明顯縮小的變化趨勢(shì),沉積物類型以灰色白云巖為主,局部夾泥巖和含泥含云泥晶灰?guī)r。其外主要為臺(tái)地沉積,沉積物類型以深灰色厚層-塊狀泥晶灰?guī)r、顆�；�?guī)r以及細(xì)晶一粉晶白云巖為主。研究區(qū)馬四段平面上沉積相變化規(guī)律性明顯,自西向東方向依次發(fā)育海槽、深緩坡、淺緩坡和淺灘、臺(tái)地。在上述研究的基礎(chǔ)上建立了研究區(qū)沉積相模式圖。
[Abstract]:At present, the western region Ordos four member of Majiagou Formation carbonate strata, sedimentary microfacies and sedimentary facies research status and other aspects of the distribution and the problems in carbonate stratigraphy, petrology, structural geology and sedimentology, using field and laboratory, the combination of macroscopic and microscopic methods, described by field section and the core of fine observation, conventional microscope observation and identification based on analysis of data combined with the carbon and oxygen isotope, the stratigraphic framework, sedimentary facies, facies, vertical sedimentary sequence, plane distribution laws were studied.
In the analysis of regional geological background, tectonic history and geological features on the basis of comprehensive analysis of lithology, logging curves and paleontology, the study area that strata horizontal East-West appears on both sides of the thin middle thick, from south to north with strata thickness gradually thickening trend. The plane in the study area of chess 1- Hubei 19- exploration over 1 well as Western circles, formation thickness plane distribution regularity, from east to West stratigraphic thickness has obvious trend. The eastern section of the horse four thickened stratum thickness on the plane in Dingbian area high value area around to gradually thinning;
The four section summarized the sedimentary features of Majiagou Formation in the study area, which is divided into carbonate ramp carbonate platform and two kinds of sedimentary facies, and can be further divided into 6 subfacies and several microfacies. Horizontally, from west to east by the carbonate ramp trough - deep ramp - shallow ramp the phase transition consists of carbonate platform for Taiwan Shoal flat sub facies composed of phase. The sedimentary environment of the study area is from the west to the East water gradually becomes shallow, the water energy gradually increased, the central uplift of the East once again weakened. Ma Sishi study area inherited the ancient landform Ma three, Ma Sishi has water in the study area therefore, to deepen, sediment lithology calcareous dolomite and limestone. With the transgression process to further expand the direction of seawater intrusion and intrusion early direction, Tai Ping area change tendency is significantly reduced, sediment types in gray Dolomite, local mudstone and mud containing limestone. Its main Unni as platform sediments, sediment types in dark gray thick bedded and massive micritic limestone, grain limestone and fine crystal dolomite. The study area four plane sedimentary facies variation regularity is obvious, from the west to the to the East are developed trough, deep ramp, shallow ramp and shallow tableland. Sedimentary facies model was established on the map on the basis of the above research.

【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】：2015
【分類號(hào)】：P618.13

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 葛銘,孟祥化,曠紅偉,蔡國(guó)印,劉燕學(xué),劉為付;微亮晶(臼齒)碳酸鹽巖:21世紀(jì)全球地學(xué)研究的新熱點(diǎn)[J];沉積學(xué)報(bào);2003年01期

2 侯方浩,方少仙,董兆雄,趙敬松,盧蜀秀,吳詒,陳婭娜;鄂爾多斯盆地中奧陶統(tǒng)馬家溝組沉積環(huán)境與巖相發(fā)育特征[J];沉積學(xué)報(bào);2003年01期

3 霍勇;羅順社;龐秋維;金姍姍;羅軍梅;;鄂爾多斯臺(tái)地靖邊潛臺(tái)南部中奧陶統(tǒng)馬五_1~2巖相古地理[J];中國(guó)地質(zhì);2012年01期

4 王玉新;鄂爾多斯地塊早古生代構(gòu)造格局及演化[J];地球科學(xué);1994年06期

5 劉池洋;趙紅格;王鋒;陳洪;;鄂爾多斯盆地西緣(部)中生代構(gòu)造屬性[J];地質(zhì)學(xué)報(bào);2005年06期

6 馮增昭,鮑志東,康祺發(fā),張永生,譚健,李振亞,龐福民,趙學(xué)仁;鄂爾多斯奧陶紀(jì)古構(gòu)造[J];古地理學(xué)報(bào);1999年03期

7 汪壽松;加強(qiáng)對(duì)鄂爾多斯及其相鄰地區(qū)沉積與構(gòu)造演化的研究[J];地球科學(xué)信息;1988年03期

8 楊華;黃道軍;鄭聰斌;;鄂爾多斯盆地奧陶系巖溶古地貌氣藏特征及勘探進(jìn)展[J];中國(guó)石油勘探;2006年03期

9 羅順社;霍勇;羅軍梅;呂奇奇;尚飛;淡衛(wèi)東;龐錦蓮;;靖邊潛臺(tái)南部中奧陶統(tǒng)馬五1～4亞段沉積演化特征研究[J];礦物巖石地球化學(xué)通報(bào);2011年04期

10 賈承造;趙政璋;杜金虎;趙文智;鄒才能;胡素云;;中國(guó)石油重點(diǎn)勘探領(lǐng)域——地質(zhì)認(rèn)識(shí)、核心技術(shù)、勘探成效及勘探方向[J];石油勘探與開發(fā);2008年04期

，

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