【摘要】：塔中低凸起塔中10號構(gòu)造帶上奧陶統(tǒng)臺內(nèi)礁灘以其豐富的油氣資源潛力成為塔中碳酸鹽巖油氣勘探的重點,但沉積微相分布研究程度低也成為了該區(qū)進一步勘探的瓶頸。論文以地層學(xué)、碳酸鹽巖石學(xué)、沉積學(xué)等學(xué)科理論為指導(dǎo),運用地質(zhì)、地球物理等技術(shù)手段,在塔中10號構(gòu)造帶上奧陶統(tǒng)良里塔格組地層精細(xì)劃分與地層分布模式建立的基礎(chǔ)上,通過巖心、薄片、測井等相標(biāo)志,識別研究區(qū)各沉積微相類型,分析沉積相縱向發(fā)育特征并建立地層對比剖面,分析沉積相橫向展布特征；井震結(jié)合,劃分地震相類型,并建立地震相對比剖面及平面分布圖,分析地震相橫向及平面分布特征；結(jié)合沉積相及地震相的研究成果,建立沉積相演化模式,分析不同類型礁灘體組合的演化特征；綜合研究成果,對研究區(qū)沉積相平面分布進行分段預(yù)測,明確礁灘體有利分布區(qū)。 研究區(qū)良里塔格組自下而上可劃分為五段、12個小層,地層厚度具有兩邊薄中間厚的變化特征。塔中10號構(gòu)造帶良里塔格組主要巖石類型有砂屑灰?guī)r、生屑灰?guī)r、藻粒灰?guī)r、粒屑泥晶灰?guī)r、泥晶灰?guī)r、隱藻泥晶灰?guī)r和格架巖七種巖石類型,其中以砂屑灰?guī)r和生屑灰?guī)r為主,含量分別為45.7%和24.35%。FMI成像測井相分為層狀、塊狀、斑狀相,其含量分別為56.18%、19.64%和24.18%。研究區(qū)沉積相分為臺內(nèi)灘,臺內(nèi)緩坡、臺內(nèi)洼地、臺內(nèi)礁丘、臺坪5個亞相及鮞粒灘、(生屑)砂屑灘、核形石灘、礁(丘)核、礁(丘)坪、丘(翼)、藻坪、泥灰坪等8種沉積微相,主要以(生屑)砂屑灘和臺內(nèi)點丘微相為主。沉積相縱向上表現(xiàn)為良五段時期為臺內(nèi)灘亞相沉積；良四段晚期海平面升至最高,為臺內(nèi)洼地亞相沉積；在良三-良二段時期沉積了一套臺內(nèi)洼地、臺內(nèi)緩坡的垂向組合；良一時期沉積了一套臺內(nèi)緩坡、臺內(nèi)點丘、臺內(nèi)灘及臺內(nèi)洼地的垂向組合,頂部發(fā)育一套較厚的核形石灘。橫向上,塔中10號帶北西-南東向,礁灘體的發(fā)育規(guī)模自西向東逐漸變大,厚度逐漸增大,灰泥丘主要在良二段的中部發(fā)育；北東-南西向,表現(xiàn)為隆凹相間的沉積格局,高能灘體之間為臺內(nèi)緩坡至洼地的低能沉積。根據(jù)地震幾何反射特征,將良里塔格組地震相分為丘狀外形、弱-中強振幅相；丘狀外形、強振幅、中等連續(xù)相等7種地震相類型。丘狀反射和中弱振幅亞平行連續(xù)或斷續(xù)反射主要分布于塔中10號帶內(nèi)部的高能灘體和丘灘體發(fā)育區(qū),中-強振幅平行連續(xù)反射主要分布于過渡區(qū)臺內(nèi)緩坡和臺內(nèi)洼地沉積。 平面上臺內(nèi)礁灘體在塔中10號構(gòu)造帶內(nèi)呈帶狀分布,臺內(nèi)灘之間以臺內(nèi)緩坡及臺內(nèi)洼地發(fā)育為主,良一段至良三段是臺內(nèi)礁灘體發(fā)育的有利層位。其中臺內(nèi)灘、臺內(nèi)礁丘為有利相區(qū),為儲層研究及進一步勘探的重點。論文豐富了塔中地區(qū)開闊臺地沉積研究,并可以為研究區(qū)下一步油氣勘探提供了一定的指導(dǎo)。
[Abstract]:The reef beach in the Ordovician platform of Tazhong No. 10 structural belt in the middle uplift of Tarim Basin has become the focus of hydrocarbon exploration for carbonate rocks with its rich potential of oil and gas resources, but the low degree of sedimentary microfacies distribution has also become the bottleneck of further exploration in this area. Guided by the theories of stratigraphy, carbonate petrology, sedimentology and so on, the paper applies geological, geophysical and other technical means. On the basis of fine stratigraphic division and formation distribution model of the Litag formation in Tazhong No. 10 structural belt, the sedimentary microfacies types in the study area can be identified by means of core, thin slice, logging and other facies markers. The longitudinal developmental characteristics of sedimentary facies and the establishment of stratigraphic correlation section are analyzed, the horizontal distribution characteristics of sedimentary facies are analyzed, the types of seismic facies are classified by combining well and earthquake, and the correlation section and plane distribution map of seismic facies are established. The characteristics of lateral and plane distribution of seismic facies are analyzed, the evolution model of sedimentary facies is established, and the evolution characteristics of different types of reef and beach assemblages are analyzed. The stratigraphic distribution of sedimentary facies in the study area is forecasted, and the favorable distribution area of reef and beach body is determined. The Lianglitag formation in the study area can be divided into five sections from the bottom to the top with 12 sublayers. The thickness of the strata has the characteristics of thin and intermediate thickness on both sides. The main rock types of Lianglitag formation in Tazhong No. 10 structural belt are sandclastic limestone, bioclastic limestone, algal limestone, granulated marl limestone, cryptic algal marl limestone and framework rock. Among them, sand limestone and bioclastic limestone are dominant, the content of which is 45.7% and 24.35%.FMI imaging logging facies are stratiform, block and porphyry respectively, and their contents are 56.18% and 24.18%, respectively. The sedimentary facies in the study area are divided into Taiwan beach, gentle slope in platform, depression in platform, reef hill in platform, five subfacies in platform and oolitic beach, sand and debris beach, core stone beach, reef (hill) core, reef (wing), algal flat, etc. There are 8 kinds of sedimentary microfacies, such as mudstone flat and so on. The sedimentary facies are as follows: the fifth member of the Yangtze formation is the subfacies of the flat in the platform, the sea level of the fourth member rises to the highest level, and the subfacies of the depressions within the platform are deposited in the period of the third and the second member of Liang Sanliang, and the vertical assemblage of the gentle slope in the platform is deposited. A set of gentle slope, dome, beach and depressions within the platform were deposited in Liang-1 period, and a set of thicker nuclear rocky beach was developed at the top of the platform. Horizontally, in the NW-SE direction of Tazhong No. 10 belt, the scale and thickness of the reef body gradually increased from west to east, and the plaster mound mainly developed in the middle of the second member of Liang, and the sedimentary pattern of uplift and depression appeared in the NE-NW direction. Between the high energy beach bodies is the low energy deposit from the gentle slope to the depression in the platform. According to the characteristics of seismic geometric reflection, the seismic facies of the Lianglitag formation are divided into 7 types of seismic facies: mound shape, weak-medium strong amplitude facies, mound shape, strong amplitude and medium continuous equal seismic facies. The mound reflection and the moderate and weak amplitude subparallel continuous or intermittent reflection are mainly distributed in the high energy beach body and the hilly body development area in the Tazhong 10 belt, and the moderate and strong amplitude parallel continuous reflection mainly distribute in the gentle slope and depositional depositions in the transitional area. There is a zonal distribution of reef beach in Tazhong No. 10 tectonic belt, in which gentle slope and depressions are dominant, and the Liangyi to the third member is the favorable horizon for the development of the reef beach body in Tazhong. Among them, the beach and reef mound are favorable facies area, which is the focus of reservoir research and further exploration. This paper enriches the study of open platform sediments in Tazhong area and provides some guidance for further oil and gas exploration in the study area.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

【參考文獻】

相關(guān)期刊論文 前8條

1 金順愛,李德生;中國海相油氣地質(zhì)勘探與研究——訪李德生院士[J];海相油氣地質(zhì);2005年02期

2 江懷友;宋新民;王元基;安曉璇;齊仁理;彭仕宓;;世界海相碳酸鹽巖油氣勘探開發(fā)現(xiàn)狀與展望[J];海洋石油;2008年04期

3 ;Study on 3D simulation of wave fields in acoustic reflection image logging[J];Science in China(Series D:Earth Sciences);2008年S2期

4 朱劍兵;趙培坤;;國外地震相劃分技術(shù)研究新進展[J];勘探地球物理進展;2009年03期

5 王招明;張麗娟;王振宇;韓劍發(fā);劉運宏;沈安江;;塔里木盆地奧陶系礁灘體特征與油氣勘探[J];中國石油勘探;2007年06期

6 曾允孚;王成善;;海洋碳酸鹽沉積相模式[J];礦物巖石;1991年03期

7 董運青;;碳酸鹽巖微相研究現(xiàn)狀與發(fā)展展望[J];科技視界;2012年22期

8 唐武;王英民;楊彩虹;仲米虹;李冬;秦培莉;朱國隆;刁宛;;生物礁、生物丘及灘相沉積的地震特征對比與識別——以瓊東南盆地深水區(qū)儲層預(yù)測為例[J];海相油氣地質(zhì);2013年02期

，

本文編號：2253593