收稿日期: 2006-05-15
修回日期: 2006-07-14
网络出版日期: 2006-12-10
基金资助
国家“十五”重点科技攻关课题(编号:2001BA605A09)资助.
EVOLUTION CHARACTERISTICS OF GASEOUS HYDROCARBON DURINGTHERMAL SIMULATION OF DEEP SOURCE ROCKS
Received date: 2006-05-15
Revised date: 2006-07-14
Online published: 2006-12-10
对济阳坳陷沙四段和昌潍坳陷孔二段的泥岩样品进行热模拟实验并对其气态烃产物进行分析后表明,气态烃产率随热模拟温度升高而增大,350℃时开始急剧增大;产物中甲烷含量和C2―C5重烃含量均随模拟温度的升高而增大,C2-C5占C1-C2的比例呈降低趋势。对气态烃的稳定碳同位素进行分析后指出,甲烷碳同位素在350℃之前有所减小,当温度超过350℃后逐渐增大;C1―C4烃类气体碳同位素分布在-24.6‰~-42.6‰之间。还指出济阳坳陷和昌潍坳陷深层烃源岩在进入成熟演化阶段后具有生油气的潜力,但烃源岩的原始有机碳含量对油气的生成量有影响。
袁东山;张枝焕;曾艳涛;张学军;董波; . 深层烃源岩热模拟过程中气态烃产物变化特征――以济阳坳陷沙四段和昌潍坳陷孔二段烃源岩为例[J]. 天然气地球科学, 2006 , 17(6) : 833 -836 . DOI: 10.11764/j.issn.1672-1926.2006.06.833
Low mature mudstone from Jiyang depression and Changwei depression have been studied by the thermal simulating experiment. The results show that yield of gaseous hydrocarbon become more and more with increasing simulation temperature and begin increasing rapidly at 350℃. With the simulation thermal heightened, the contents of methane and heavy hydrocarbon are augment and (C2-C5)/(C1- C5) is reducing. Stable carbon isotope analyses display that methane carbon isotope has depressed(350℃ ) and building up exceed 350C. Gaseous carbon isotopic distribution at -24.6‰-42.6‰. The result show that the source rocks can produce oil and gas if they are mature.
[1]HOERING T C. Thermal relations of kerogen with added water, heavy water and pure organic substances[J].Org Geochem, 1984, (5):267-278.
[2] LEWAN M D, WINTERS J C, DONAL J H. Generation of oil-like pyrolyzates from organic-rich shales[J]. Science, 1979, 203: 879-899.
[3] 刘洛夫,毛东风,妥进才,等.源岩生烃模拟实验的研究现状[J].矿物岩石地球化学通报,1997,16(1):55-57.
[4] 刘大锰,金奎励,姚素平.沉积有机质的成烃模拟实验研究[J].地质论评,1995,41(6):544-552.
[5] 刘洛夫,王伟华,李术元.干酪根二次生烃热模拟实验研究 [J].沉积学报,1995,13(增刊):147-150.
[6] 姜峰,杜建国,王万春,等.高温超高压模拟实验研究——高温高压下烷烃产物的演化特征[J].沉积学报,1998,16(4):145-148.
[7] 夏燕青,罗斌杰,王春江.热模拟实验产物中烷烃参数的地球化学意义[J].石油学报,1996,17(2):36-40.
[8] 王兆云,程克明,张柏生.加水热模拟实验气态产物特征及演化规律研究[J].石油勘探与开发,1995,22(3):36-40.
[9] 黄志龙,钟宁宁,张四海.碳酸盐岩与泥岩烃源岩生气规律对比研究[J].地球化学,2003,32(1):29-34.
[10] 段毅,周世新.塔里木盆地石炭系烃源岩热模拟实验地球化学研究——气态和液态产物的产率及演化特征[J].沉积学报,1999,17(增刊):832-835.
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