本文選題：凝析油 + 蠟質(zhì)油��； 參考：《中國(guó)科學(xué):地球科學(xué)》2017年05期

【摘要】：對(duì)于發(fā)育多套不同成熟度烴源巖、存在多種類(lèi)型原油及天然氣的復(fù)雜含油氣區(qū),如何準(zhǔn)確判斷油氣來(lái)源與成因一直是非常困難的事情.準(zhǔn)噶爾盆地南緣中部地區(qū)存在正常原油、輕質(zhì)油、凝析油、蠟質(zhì)油和稠油,同時(shí)也發(fā)現(xiàn)了大量天然氣,長(zhǎng)期以來(lái)對(duì)該地區(qū)凝析油的來(lái)源與成因一直存在很大爭(zhēng)議,而對(duì)于蠟質(zhì)油與稠油的形成則幾乎沒(méi)有研究.本文以該地區(qū)為研究實(shí)例,探討復(fù)雜油氣區(qū)凝析油、蠟質(zhì)油與稠油成因判識(shí)地質(zhì)地球化學(xué)方法,揭示該地區(qū)多種類(lèi)型原油并存的原因與地球化學(xué)過(guò)程.南緣中部地區(qū)40多個(gè)原油、輕質(zhì)油、凝析油和稠油化學(xué)組成及其變化特征精細(xì)分析對(duì)比表明,該區(qū)凝析油以低碳數(shù)正構(gòu)烷烴為主,含有豐富的環(huán)己烷、甲基環(huán)己烷等環(huán)烷烴和苯、甲苯、二甲苯等低碳數(shù)芳烴,庚烷值在19~21%,異庚烷值在1.9~2.1,甲苯/正庚烷比值在1.5~2.0之間,其烷烴的分布與高密度蠟質(zhì)原油和稠油呈鏡像關(guān)系.結(jié)合該區(qū)原油、凝析油油源及天然氣氣源對(duì)比結(jié)果認(rèn)為,該區(qū)凝析油是白堊系湖相烴源巖生成的成熟原油油藏,在后期遭受了侏羅系生成的高成熟天然氣氣侵改造的產(chǎn)物,為蒸發(fā)分餾/相控運(yùn)移分餾作用形成的凝析油.蠟質(zhì)油是蒸發(fā)分餾/相控運(yùn)移分餾作用過(guò)程的中間產(chǎn)物或階段產(chǎn)物,稠油是蒸發(fā)/相控運(yùn)移分餾作用的殘留物.蒸發(fā)/相控運(yùn)移分餾作用是南緣凝析油、蠟質(zhì)油、稠油形成的主要成因機(jī)理,其導(dǎo)致油藏原油及凝析油的正庚烷、甲基環(huán)己烷、甲苯等輕烴化合物含量發(fā)生很大變化,使凝析油的甲苯/正庚烷等比值具有很大的不確定性.因此,不能依據(jù)凝析油中甲苯/正庚烷與正庚烷/甲基環(huán)己烷比值簡(jiǎn)單地套用Thompson圖版判識(shí)其成因,而必須從研究區(qū)地質(zhì)條件、烴源巖成烴演化與生烴歷史、各種類(lèi)型油氣分子組成與分布特征、不同物理化學(xué)性質(zhì)油氣在縱向及區(qū)域上分布等方面綜合分析判識(shí)凝析油的成因.
[Abstract]:For the development of multiple sets of source rocks with different maturity and the existence of complex oil-bearing regions with various types of crude oil and natural gas, it has been very difficult to accurately judge the source and origin of oil and gas. There are normal crude oil, light oil, condensate oil, waxy oil and heavy oil in the central area of the southern margin of Junggar Basin. At the same time, a large amount of natural gas has also been discovered. For a long time, the origin and origin of condensate oil in this area has been very controversial. The formation of waxy oil and heavy oil is hardly studied. In this paper, taking this area as an example, the origin of condensate, waxy oil and heavy oil in complex oil area is discussed, and the reason and geochemical process of the coexistence of various types of crude oil in this area are revealed. The fine analysis and comparison of the chemical composition and variation characteristics of more than 40 crude oil, light oil, condensate oil and heavy oil in the central part of the southern margin show that the condensate oil in this area is dominated by low carbon number n-alkanes and rich in cyclohexane. Low carbon aromatic hydrocarbons such as methylcyclohexane and benzene, toluene, xylene, etc., the heptane number is 1921, the isoheptane number is 1.9 ~ 2.1, and the ratio of toluene to n-heptane is 1.5 ~ 2.0. The distribution of alkanes is mirrored with high density waxy crude oil and heavy oil. Combined with the correlation of crude oil, condensate oil source and natural gas source, it is concluded that the condensate oil is a mature crude oil reservoir generated by lacustrine source rocks of the Cretaceous system, and has been the product of gas invasion and transformation of highly mature natural gas generated by Jurassic system in the late stage. Condensate formed by evaporative fractionation / phase controlled migration fractionation. Wax oil is the intermediate product or stage product of evaporative fractionation / phase controlled migration fractionation process, and heavy oil is the residue of evaporation / phase controlled migration fractionation process. Evaporation / phase-controlled migration fractionation is the main mechanism of formation of condensate, waxy oil and heavy oil in the southern margin, which leads to great changes in the contents of light hydrocarbons such as n-heptane, methylcyclohexane and toluene in crude oil and condensate. The ratio of toluene to n-heptane of condensate oil is uncertain. Therefore, based on the ratio of toluene / n-heptane to n-heptane and n-heptane / methylcyclohexane in condensate oil, we can not simply apply the Thompson chart plate to judge its origin, but must base on the geological conditions, hydrocarbon generation evolution and hydrocarbon generation history of source rock in the study area. The molecular composition and distribution of various types of oil and gas, as well as their physical and chemical properties, the vertical and regional distribution of oil and gas, etc., are comprehensively analyzed to identify the origin of condensate oil.
【作者單位】： 中國(guó)石油勘探開(kāi)發(fā)研究院;提高石油采收率國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)石油天然氣集團(tuán)公司油氣地球化學(xué)重點(diǎn)實(shí)驗(yàn)室;中國(guó)石油新疆油田公司;浙江大學(xué)地球科學(xué)系;
【基金】：中國(guó)石油天然氣股份有限公司科學(xué)研究與技術(shù)開(kāi)發(fā)項(xiàng)目(編號(hào):06-01A-01-02,2011A-0201,2014A-0211,2016A-0202)資助
【分類(lèi)號(hào)】：P618.13

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李贊豪;不同類(lèi)型的凝析油及其地質(zhì)分布[J];石油實(shí)驗(yàn)地質(zhì);1987年02期

2 李道軒;;預(yù)測(cè)凝析油氣體系蠟沉積熱力學(xué)模型[J];新疆石油地質(zhì);2006年01期

3 武杰,張以珈;凝析油的氣相色譜分析[J];石油實(shí)驗(yàn)地質(zhì);1986年01期

4 陳建渝;凝析油的多種成因概述[J];地質(zhì)科技情報(bào);1987年03期

5 陳建渝,王啟軍,何炳駿;中國(guó)渤海灣北部凝析油的特征和成因[J];地球科學(xué);1990年01期

6 陳?ài)`發(fā)，沈平，文啟彬;我國(guó)凝析油的成因類(lèi)型及其地球化學(xué)特征和意義[J];沉積學(xué)報(bào);1995年01期

7 何家雄;梁可明;馬文紅;;潿14-2-1井凝析油氣的煤成因證據(jù)[J];中國(guó)海上油氣;1992年05期

8 張水昌;運(yùn)移分餾作用:凝析油和蠟質(zhì)油形成的一種重要機(jī)制[J];科學(xué)通報(bào);2000年06期

9 童敏,李相方,程時(shí)清;近井地帶凝析油聚集機(jī)理研究綜述[J];力學(xué)進(jìn)展;2003年04期

10 盧松年,張剛;一種新的凝析油形成模式[J];中國(guó)科學(xué)(B輯 化學(xué) 生命科學(xué) 地學(xué));1994年01期

相關(guān)會(huì)議論文 前1條

1 盧雙舫;申家年;薛海濤;王躍文;劉新穎;李宏濤;;松遼盆地齊家-古龍凹陷凝析油藏成因機(jī)制研究[A];第十屆全國(guó)有機(jī)地球化學(xué)學(xué)術(shù)會(huì)議論文摘要匯編[C];2005年

相關(guān)碩士學(xué)位論文 前1條

1 章成東;變形介質(zhì)中凝析油氣體系流固耦合相平衡理論及應(yīng)用研究[D];西南石油大學(xué);2006年

，

本文編號(hào)：1805983