本文選題：庫車坳陷 + 烴源巖��； 參考：《中國科學(xué)院研究生院(滲流流體力學(xué)研究所)》2015年碩士論文

【摘要】：庫車坳陷是塔里木盆地油氣勘探的重要陣地之一,具備良好的油氣成藏條件,擁有豐富的油氣資源。本次研究主要利用地球化學(xué)理論和方法,輔助以沉積學(xué)特征研究,開展了對庫車東部中生界烴源巖、天然氣以及原油地球化學(xué)特征進(jìn)行了研究,并開展了油氣源對比研究。在對油氣源對比、油氣成藏特征、成藏期次、運(yùn)聚特征等方面深入分析的基礎(chǔ)上,預(yù)測了有利勘探區(qū)帶。侏羅系和三疊系兩套煤系泥巖是庫車東部的主力烴源巖,兩套烴源巖成因類型相似,常規(guī)的分析方法和地化指標(biāo)難以區(qū)分。本文利用烴源巖生物標(biāo)志化合物指標(biāo)對庫車東部烴源巖進(jìn)行了重新認(rèn)識,研究發(fā)現(xiàn),侏羅系和三疊系烴源巖均為典型的陸相烴源巖,形成于淡水—微咸水的弱氧化沉積環(huán)境,兩套烴源巖差異較小,識別難度大。針對庫車東部侏羅系和三疊系兩套烴源巖類型相似難以區(qū)分的問題,本次研究采用烴源巖熱模擬的方法來進(jìn)行判識。烴源巖熱模擬輕烴分析發(fā)現(xiàn),庫車東部烴源巖熱模擬輕烴中的支鏈烷烴與芳香烴相對含量存在一定差異,并由此建立了該區(qū)烴源巖輕烴判識圖版,為氣源對比提供了新的手段。利用輕烴判識圖版,并結(jié)合同位素等地球化學(xué)參數(shù),對庫車東部開展了油氣源對比,初步認(rèn)為庫車坳陷東部天然氣主要為高成熟演化階段煤型氣,并混有少量油型氣,迪北和迪那地區(qū)的天然氣主要來源于三疊系烴源巖；庫車坳陷東部地區(qū)原油主要來源于侏羅系烴源巖,油源巖主要為腐殖型烴源巖,以陸相生物有機(jī)質(zhì)輸入為主,成烴古環(huán)境偏氧化環(huán)境。庫車坳陷東部氣藏為兩期成藏,早期以液態(tài)烴充注為主,晚期以氣態(tài)烴充注為主,儲層致密時(shí)間早于氣態(tài)烴充注時(shí)間,即先致密后成藏,表現(xiàn)為致密氣藏的特征。迪北斜坡帶和吐格爾明構(gòu)造帶均為大型構(gòu)造斜坡帶,并具有源儲大面積疊置連片分布、源充足、儲相對致密的特征,具備致密砂巖氣藏發(fā)育的有利條件,是庫車東部目前有利的現(xiàn)實(shí)勘探區(qū)帶。本次研究對于庫車坳陷東部侏羅系油氣勘探具有重要的理論意義和應(yīng)用價(jià)值,將深化對庫車坳陷東部油氣富集規(guī)律的認(rèn)識,指導(dǎo)該地區(qū)油氣的進(jìn)一步勘探。
[Abstract]:Kuqa depression is one of the important positions for oil and gas exploration in Tarim Basin. It has good oil and gas accumulation conditions and abundant oil and gas resources. The geochemical characteristics of Mesozoic source rocks, natural gas and crude oil in the eastern Kuqa area were studied by means of geochemical theory and method, assisted by the study of sedimentological characteristics, and a comparative study of oil and gas sources was carried out. On the basis of the deep analysis of oil and gas source correlation, oil and gas accumulation characteristics, hydrocarbon accumulation times, migration and accumulation characteristics, the favorable exploration zones are predicted. The Jurassic and Triassic coal series mudstones are the main source rocks in the east of Kuqa. The genetic types of the two sets of source rocks are similar and it is difficult to distinguish the conventional analysis methods from geochemistry indexes. In this paper, the source rocks in the eastern part of Kuqa are rerecognized by using the biomarker index of source rocks. It is found that both Jurassic and Triassic source rocks are typical continental source rocks formed in the weakly oxidized sedimentary environment of freshwater and brackish water. The difference between the two sets of source rocks is small, and it is difficult to identify. In view of the difficulty of distinguishing the similarity between Jurassic and Triassic source rocks in eastern Kuqa, the method of thermal simulation of source rocks is used to identify the source rocks in this study. It is found that the relative content of branched alkanes and aromatic hydrocarbons in the thermal simulation of light hydrocarbons in source rocks in eastern Kuqa is different from that in source rocks, and the light hydrocarbon identification chart of source rocks in this area has been established, which provides a new means for gas source correlation. Using light hydrocarbon identification chart and geochemical parameters such as isotopes, oil and gas source correlation has been carried out in the east of Kuqa. It is preliminarily considered that natural gas in the east of Kuqa depression is mainly coal-type gas of high maturity and evolution stage and mixed with a small amount of oil-type gas. The natural gas in the Dibei and Dinah areas is mainly derived from Triassic source rocks, the crude oil in the eastern Kuqa depression is mainly derived from Jurassic source rocks, the source rocks are mainly humic source rocks, and the main source rocks are terrestrial organic matter. Hydrocarbon generation paleo environment partial oxidation environment. The gas reservoirs in the eastern Kuqa depression are formed in two stages, mainly liquid hydrocarbon filling in early stage and gaseous hydrocarbon filling in late stage. The reservoir densification time is earlier than that of gaseous hydrocarbon filling time, that is, first compaction and then reservoir formation, which is characterized by tight gas reservoir. The Dibei slope belt and the Turgumin structural belt are both large structural slope zones, and have the characteristics of large area superposition of source storage, abundant source and relatively dense reservoir, and have favorable conditions for the development of tight sandstone gas reservoir. Kuqa east of the current favorable exploration zone. This study has important theoretical significance and application value for Jurassic oil and gas exploration in the east of Kuqa depression. It will deepen the understanding of the law of oil and gas enrichment in the eastern part of Kuqa depression and guide the further exploration of oil and gas in this area.
【學(xué)位授予單位】：中國科學(xué)院研究生院(滲流流體力學(xué)研究所)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 吳朝東,林暢松,申延平,謝小建,肖建新,劉景彥,史艷麗;庫車坳陷侏羅紀(jì)沉積環(huán)境和層序地層分析[J];沉積學(xué)報(bào);2002年03期

2 何登發(fā);周新源;楊海軍;雷剛林;馬玉杰;;庫車坳陷的地質(zhì)結(jié)構(gòu)及其對大油氣田的控制作用[J];大地構(gòu)造與成礦學(xué);2009年01期

3 杜治利;王飛宇;張水昌;張寶民;梁狄剛;;庫車坳陷中生界氣源灶生氣強(qiáng)度演化特征[J];地球化學(xué);2006年04期

4 王鐵冠,張枝煥;油藏地球化學(xué)描述的基本原理與方法[J];勘探家;1997年04期

5 賈承造;魏國齊;;塔里木盆地構(gòu)造特征與含油氣性[J];科學(xué)通報(bào);2002年S1期

6 趙孟軍,盧雙舫,李劍;庫車油氣系統(tǒng)天然氣地球化學(xué)特征及氣源探討[J];石油勘探與開發(fā);2002年06期

7 李玉桓,李長宏,夏亮;油藏地球化學(xué)進(jìn)展[J];河南石油;1999年05期

8 沈揚(yáng);馬玉杰;趙力彬;張榮虎;壽建峰;張惠良;;庫車坳陷東部古近系—白堊系儲層控制因素及有利勘探區(qū)[J];石油與天然氣地質(zhì);2009年02期

9 湯華國,王剛,彭軾,王媛,錢鈴,盧玉紅;庫車坳陷天然氣資源勘探前景[J];天然氣地球科學(xué);2003年06期

10 呂錫敏,皮學(xué)軍,任戰(zhàn)利,劉全新,蔡振忠,丁兆海;庫車前陸盆地含油氣系統(tǒng)的地質(zhì)特征[J];天然氣地球科學(xué);2004年03期

，

本文編號：1799379