本文選題：松遼盆地　切入點(diǎn)：石炭-二疊系　出處：《長(zhǎng)江大學(xué)》2015年碩士論文

【摘要】：本文依據(jù)石油地質(zhì)學(xué)、油氣地球化學(xué)及構(gòu)造體系控油等理論,在對(duì)前人資料進(jìn)行了搜集并總結(jié)的基礎(chǔ)上,結(jié)合野外地質(zhì)調(diào)查和典型井的巖心觀察,首先對(duì)松遼盆地石炭-二疊系的烴源巖進(jìn)行綜合評(píng)價(jià)、建立油氣地球化學(xué)剖面,然后開(kāi)展構(gòu)造體系控源、控油研究。松遼盆地呈菱形展布,長(zhǎng)軸為北東向,長(zhǎng)約750余公里,寬330-370余公里,面積約26萬(wàn)余平方公里；其基底主要是來(lái)自石炭系、二疊系的變質(zhì)巖和花崗巖組成,構(gòu)造上可劃分為六個(gè)二級(jí)構(gòu)造單元。盆地的石炭-二疊系整體的勘探程度不高,目前確定的是大約有60多口探井鉆遇到二疊系。松遼盆地及鄰區(qū)的石炭-二疊系的主要烴源巖分布面積較廣,東部比西部的厚,研究區(qū)的四套烴源巖,主要集中分布的地區(qū)為德都-龍江、伊春-濱東、吉林中部等地區(qū),厚度差別較大。在盆地的中心地帶,石炭-二疊系烴源巖的有機(jī)碳含量高,有機(jī)碳值主要分布在0.4%-1.0%之間,部分地區(qū)大于1.0%,整體上評(píng)價(jià)為中等到好的烴源巖,而在那些盆地邊緣的露頭地區(qū),有機(jī)碳含量較低,有機(jī)碳值均小于0.4%,部分地區(qū)小于0.2%,綜合評(píng)價(jià)為差-中等的烴源巖,因此,盆地中心地帶的烴源巖有機(jī)質(zhì)豐度比邊緣地區(qū)高；就有機(jī)質(zhì)類型而言,盆地內(nèi)有機(jī)質(zhì)類型絕大部分為Ⅲ型,有機(jī)質(zhì)類型在盆地腹部為Ⅱ型,少量為Ⅰ型,露頭區(qū)以Ⅲ型為主,所以,盆地中心地帶的烴源巖的類型要比盆地邊緣的露頭地區(qū)相比較而言要好；現(xiàn)如今的有機(jī)質(zhì)成熟度普遍較高,Ro值分布在0.6%-3.4%之間,平均為2.23%,普遍進(jìn)入高-過(guò)熟階段,但是仍然可以視為有效的氣源巖。晚古生代地層中發(fā)現(xiàn)的干瀝青與該地區(qū)石炭-疊系生油巖飽和烴參數(shù)特征相似的結(jié)論表明,二疊系干瀝青來(lái)自于石炭-二疊系的烴源巖。構(gòu)造體系控制了盆地的形成與演化,從而決定了盆地的沉積特征,而沉積環(huán)境又控制著烴源巖的發(fā)育(質(zhì)量與規(guī)模),按照源控論的觀點(diǎn),松遼盆地?zé)N源巖的展布控制了油氣的分布。由此可以看出,構(gòu)造體系才是控源、控油的唯一因素,各個(gè)構(gòu)造體系的成生、演化控制了松遼盆地的形成、發(fā)展以及油氣的顯示、分布。松遼盆地石炭-二疊系烴源巖等受到來(lái)自華夏系、新華夏系及緯向系的聯(lián)合復(fù)合控制明顯,盆地及外圍地區(qū)發(fā)育有大量的基底斷裂,NNE向及NE向斷裂為控盆斷裂,其次為EW向斷裂,在基底斷裂的控制下,晚古生代地層及沉積相帶亦呈現(xiàn)出NNE向及EW向展布,從而使得盆地及外圍地區(qū)發(fā)育的烴源巖展布方向與盆地軸向一致,呈現(xiàn)出NNE向及EW向展布,與此同時(shí),油氣資源的分布也呈現(xiàn)出NNE、EW向展布,以上構(gòu)造體系的聯(lián)合復(fù)合形成的反轉(zhuǎn)構(gòu)造對(duì)于油氣的聚集非常有利,在壓應(yīng)力和扭應(yīng)力下形成的反轉(zhuǎn)構(gòu)造與源巖生烴期近似同步,使得油氣能夠進(jìn)入到由反轉(zhuǎn)構(gòu)造形成的圈閉內(nèi),松遼盆地南部的大量油氣區(qū)均與反轉(zhuǎn)構(gòu)造有關(guān)。因此,松遼盆地及外圍地區(qū)構(gòu)造體系控源控油的研究對(duì)于盆地尋找油氣具有一定的指導(dǎo)意義。
[Abstract]:On the basis of petroleum geology, oil and gas geochemistry and tectonic system control theory, in the previous data were collected and summarized on the basis of the observation of combination of field geological survey and typical wells cores, the first comprehensive evaluation of Carboniferous Permian in Songliao Basin, hydrocarbon source rocks, the establishment of oil gas geochemical profiles, and then carry out tectonic system control source, control study. Songliao basin shaped distribution, major axis of North East, about 750 kilometers wide, 330-370 kilometers, an area of about 26 square kilometers of the basal million; mainly from the Carboniferous Permian, two metamorphic rock and granite, the structure can be divided into six grade two the Permian basin tectonic unit. The Carboniferous exploration degree is not high overall, is currently identified about 60 wells drilled encountered. The distribution of Permian hydrocarbon source rock of Permian area of Songliao Basin and its adjacent area of Carboniferous Wider than in the west of the study area is thick, four sets of source rock, mainly concentrated in Germany - Longjiang, Yichun - Bindong, central Jilin and other regions, the thickness difference. In the center of the basin, the organic carbon content in Carboniferous Permian source rocks is high, the value of organic carbon distribution in 0.4%-1.0%, in some areas more than 1%, for the evaluation until the source rocks in the whole, and in the edge of the basin outcrop area, low organic carbon content and organic carbon values were less than 0.4%, less than 0.2% in some areas, comprehensive evaluation for poor medium source rocks, therefore, hydrocarbon source rocks the abundance of organic matter than the center of the basin edge area is high; the type of organic matter in the basin, the type of organic matter for the vast majority of type III, the type of organic matter type II in the basin, a small amount of type I and type III in outcrop area, so the center of the basin, the hydrocarbon source rocks The edge of the basin type than the outcrop area comparatively better; now the maturity of organic matter is generally high, the distribution of Ro value between 0.6%-3.4%, the average was 2.23%, generally in the high - over mature stage, but still can be regarded as effective source rocks. Late Paleozoic strata found in the area with dry asphalt the Carboniferous Permian source rocks saturated hydrocarbon parameters similar to the conclusions show that the Permian dry bitumen from Carboniferous Permian source rocks. Tectonic system controlled the formation and evolution of the basin, so as to determine the sedimentary characteristics and sedimentary environment of the basin, but also control the formation of hydrocarbon source rocks (quality and scale), in accordance with the source control theory, the distribution of hydrocarbon source rocks in Songliao Basin, the distribution of oil and gas control. It can be seen that the structural system is the only source control, control factors, various structural system generation, evolution controlled in Songliao Basin The formation, development and shows that oil and gas distribution in Songliao basin. Carboniferous Permian source rock from Cathaysian, combined to control the Neocathaysian and weft, basin and the periphery area developed large basement faults, NNE and NE faults for the basin controlling fault, followed by EW in the control of fracture, basement faults, stratigraphic and sedimentary facies of Late Paleozoic also presents NNE and EW distribution, which makes the development of the source rock distribution direction of basin and its peripheral area and basin axial consistent, showing NNE trending and EW trending, at the same time, the distribution of oil and gas resources is also showing NNE and the EW trending tectonic inversion combined with the formation of the above system for oil and gas accumulation is favorable, pressure should be in synchronous approximation inversion structure and hydrocarbon generation period force and torsion stress form, making oil and gas can enter by tectonic inversion A large number of oil and gas areas in the southern Songliao basin are all related to the inversion structure. Therefore, the study of source control and oil control in the Songliao Basin and its periphery is of guiding significance for finding oil and gas in the basin.

【學(xué)位授予單位】：長(zhǎng)江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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