本文選題：源巖 + 生烴潛力��； 參考：《東北石油大學(xué)》2015年碩士論文

【摘要】：肇州凹陷沙河子組沉積地層作為松遼盆地斷陷期的產(chǎn)物,前人從烴源巖的角度對其進行研究還不夠詳細,伴著探索深度的加大和許多新現(xiàn)象的發(fā)現(xiàn),雖然對形成演化斷陷地層的構(gòu)造特征進行了重新認識,但沙河子組研究尚未有新的認識和進步,這也限制了資源量的確切落實和深層天然氣勘探的突破實施,因此亟待從沙河子組源巖品質(zhì)、生烴潛力等方面進行深入研究,為搜索新的勘探領(lǐng)域和重新審視盆地油氣資源和富集規(guī)律提供條件。利用鉆井、測井和地震資料等,開展對肇州凹陷沙河子組的源巖發(fā)育與分布和地化特征研究,并認為肇州凹陷沙河子組整體為一個二級層序,由下至上劃分為SQ1、SQ2、SQ3和SQ4共四個三級層序(柳成志,2012),結(jié)合地史、熱史及化學(xué)動力學(xué)等方法評價了沙河子組天然氣生烴潛力及資源潛力。結(jié)果表明,肇州凹陷沙河子組泥巖發(fā)育廣泛,平均厚度140米左右,其中凹陷北部湖盆中心整體較厚,南部以肇深14井及肇深15井為中心的泥巖厚度為最大。肇州凹陷沙河子組TOC整體較高,半數(shù)以上達到好的級別,尤以SQ2段與SQ3段更為突出;有機質(zhì)類型以III型為主,兼有少量II1型,有利于大量生氣;成熟度平均值2.41%,70%以上進入過成熟階段,大都進入高成熟-過成熟階段。SQ2段與SQ3段生氣量最多,分別達到12170.6×108m3與12497.5×108m3,SQ1段與SQ4段分別為2715.1×108m3和960×108m3。綜合選取不同的運聚系數(shù),計算得肇州凹陷沙河子組天然氣資源潛力為283.43—1417.15億立方米。總體看來,肇州凹陷沙河子組總生氣量為4.68×1012m3,具有較高資源潛力,為肇州凹陷沙河子組的繼續(xù)勘探開發(fā)打下良好基礎(chǔ)。
[Abstract]:The sedimentary strata of Shahezi formation in Zhaozhou sag, as the product of Songliao basin fault period, have not been studied in detail from the angle of source rock, accompanied by the increase of exploration depth and the discovery of many new phenomena. Although the structural characteristics of the formation and evolution of faulted strata have been reunderstood, there has not been any new understanding and progress in the study of the Shahezi formation, which has also restricted the exact implementation of the amount of resources and the implementation of the breakthrough in deep gas exploration. Therefore, it is urgent to study the source rock quality and hydrocarbon generation potential of Shahezi formation in order to search for new exploration fields and to re-examine the oil and gas resources and enrichment rules in the basin. Based on drilling, logging and seismic data, the source rock development, distribution and geochemical characteristics of Shahezi formation in Zhaozhou sag are studied, and it is considered that Shahezi formation in Zhaozhou sag is a second-order sequence. The natural gas hydrocarbon generation potential and resource potential of Shahezi formation are evaluated by four third-order sequences (Liu Chengzhi 2012) from the bottom up to SQ1, SQ2SQ3 and SQ4. The hydrocarbon generation potential and resource potential of natural gas in Shahezi formation are evaluated by means of geo-history, thermal history and chemical kinetics. The results show that the mudstone of Shahezi formation in Zhaozhou sag is widely developed with an average thickness of about 140 meters, in which the center of the lake basin in the north of the sag is thicker as a whole, and the mudstone thickness in the south of Shahezi formation with Zhaoshen 14 well and Zhaoshen 15 well as the center is the largest. The TOC of Shahezi formation in Zhaozhou sag is relatively high as a whole, more than half of which reach a good grade, especially in SQ2 and SQ3, the organic matter type is mainly type III, with a small amount of type II1, which is beneficial to a large amount of gas generation. The average maturity of 2.41% and over 70% entered the over-mature stage, most of them reached the high mature-over-maturation stage. SQ2 and SQ3 were the most abundant, reaching 12170.6 脳 108m3 and 12497.5 脳 108m3SQ1 and SQ4, respectively, which were 2715.1 脳 108m3 and 960 脳 108m3, respectively. The potential of natural gas resources of Shahezi formation in Zhaozhou sag is 283.43-141.75 billion cubic meters. In general, the total gas generation of Shahezi formation in Zhaozhou sag is 4.68 脳 1012m3, which has a high resource potential and lays a good foundation for further exploration and development of Shahezi formation in Zhaozhou sag.
【學(xué)位授予單位】：東北石油大學(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)碩士學(xué)位論文 前1條

1 袁大偉;三肇凹陷扶楊油層油成藏規(guī)律研究[D];大慶石油學(xué)院;2010年

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本文編號：2099141