本文關(guān)鍵詞： 塔里木盆地 中深地區(qū) 鹽下白云巖 油氣來(lái)源 油氣差異聚集　出處：《石油勘探與開(kāi)發(fā)》2017年01期 　論文類型：期刊論文

【摘要】：基于塔里木盆地中深地區(qū)儲(chǔ)集層樣品、原油樣品和天然氣樣品的地球化學(xué)特征分析,研究中深地區(qū)寒武系鹽下白云巖油氣來(lái)源及油、氣差異聚集現(xiàn)象。通過(guò)質(zhì)譜檢測(cè)發(fā)現(xiàn)儲(chǔ)集層及原油樣品重排甾烷含量低、C_(28)甾烷含量高,伽馬蠟烷含量高,原油中存在芳基類異戊二烯烴化合物;通過(guò)天然氣組成分析發(fā)現(xiàn)N_2含量低,為0.24%~4.02%。由此判斷油氣來(lái)源于寒武系—下奧陶統(tǒng)烴源巖。中寒武統(tǒng)天然氣δ~(13)C1值為-51.4‰~-44.7‰,干燥系數(shù)為0.65~0.78,為原油伴生氣;下寒武統(tǒng)天然氣δ~(13)C1值為-41.4‰~-40.6‰,干燥系數(shù)為0.99,為原油裂解氣。塔里木盆地深層存在硫酸鹽熱化學(xué)還原反應(yīng)生成的高含H_2S裂解氣的充注,中寒武統(tǒng)儲(chǔ)集層物性差、裂縫網(wǎng)絡(luò)體系不發(fā)育,故充注程度低,天然氣中H_2S含量低(0.003 8%~0.200 0%);下寒武統(tǒng)儲(chǔ)集層物性好、裂縫網(wǎng)絡(luò)體系發(fā)育,故充注程度高,天然氣中H_2S含量也高(3.25%~8.20%)。綜上,塔里木盆地中深地區(qū)寒武系鹽下白云巖油氣來(lái)源于寒武系—下奧陶統(tǒng)烴源巖,其差異聚集是儲(chǔ)集層物性以及裂縫網(wǎng)絡(luò)體系發(fā)育程度的綜合影響所致。
[Abstract]:Based on the geochemical analysis of reservoir samples, crude oil samples and natural gas samples in the middle and deep area of Tarim Basin, the oil and gas source and oil of Cambrian subsalt dolomite are studied in this paper. Gas differential aggregation phenomenon. By mass spectrometry, it was found that the rearrangement sterane content of reservoir and crude oil was low, the content of sterane was high, the content of gamma wax was high, and there were aryl isoprene hydrocarbon compounds in crude oil. Through the analysis of natural gas composition, it is found that the content of Nai _ 2 is low, which is 0.24 ~ 4.02. The hydrocarbon is derived from Cambrian-Lower Ordovician source rock. The 未 ~ (13) C _ (1) value of natural gas in the Middle Cambrian is -51.4 鈥，

本文編號(hào)：1553248