ANALYSIS OF THE SEEPAGE OIL AND OIL SOURCE IN CHENGKOU AREA OF THE SOUTHERN MARGIN OF DABASHAN
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摘要: 通过对出露于大巴山前缘一系列逆冲断层带上的液态油苗与秦岭南缘及邻区烃源岩的地球化学对比研究表明:油苗点碳同位素与下古生界烃源岩抽提物碳同位素较为接近,与二叠系烃源岩抽提物差异较大,反映油苗点的油与下古生界亲缘关系较好.但质谱分析表明,油苗点的生物标志化合物参数却与二叠系烃源岩更为相似.结合研究区的构造—沉积演化史、烃源岩的生烃演化史研究认为:油苗点油源来自于二叠系烃源岩,在运移充注过程中混入了下古生界烃源岩的有机地球化学信息.Abstract: The oil seepages were occurred along a series of thrust faults in the front of Dabashan.Based on comparative analysis of the source rocks in the southern margin of Qinling mountain and its surroundings and the seepage oil in Chengkou area,it showes that carbon isotope of the seepage oil is close to that of the extract of the Lower Paleozoic source rocks,but different with that of the extract of the Permian source rocks.The results show intimate relationship between the seepage oil and the Lower Paleozoic source rocks.However,the biomarker parameters by GS-MS indicate that the seepage oil is more similar to the Permian source rocks.According to analysis of tectono-depositional history and hydrocarbon generation history of the source rocks,the seepage oil came from the Permian source rocks.During hydrocarbon migration and entrapment,some organic geochemical information of the Lower Paleozoic source rocks was mixed.
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Key words:
- seepage oil /
- source rock /
- oil-source correlation /
- Lower Cambrian /
- Permian /
- the south of Dabashan /
- East Qinling area
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[1] 陈昭年.石油与天然气地质学[M].北京:地质出版社,2005 [2] 刘光祥.中上扬子北缘中古生界海相烃源岩特征[J].石油实验地质,2005,27(5):493～495 [3] 吴世祥,汤良杰,郭彤楼等.米仓山与大巴山交汇区构造分区与油气分布[J].石油与天然气地质,2005,26(3):362～364 [4] 裴振洪.南大巴构造带中新生代构造变形特征研究[J].石油实验地质,2007,29(3):269～274 [5] 高长林,刘光祥,张玉箴等.东秦岭-大巴山逆冲推覆构造与油气远景[J].石油实验地质,2003,25(2):523～526 [6] 秦建中.中国烃源岩[M].北京:科学出版社,2005 [7] 秦建中,付小东,腾格尔.川东北宣汉-达县地区三叠-志留系海相优质烃源岩评价[J].石油实验地质,2008,30(4):367～374 [8] 王顺玉,戴鸿鸣,王海清等.大巴山、米仓山南缘海相烃源岩的生物标志化合物特征[J].海相油气地质,2000,5(2):55～59 [9] 王顺玉,戴鸿鸣,王海清等.大巴山、米仓山南缘烃源岩特征研究[J].天然气地球科学,2000,11(4):5～14 [10] 郑冰,高仁祥.塔里木盆地原油碳硫同位素特征及油源对比[J].石油实验地质,2006,28(3):282～285 [11] 韩应钧,丁玉兰.龙门山、米仓山、大巴山及其前缘带石油天然气远景预测[J].天然气勘探与开发,2002,25(1):19～23 [12] 罗宪婴,赵宗举,孟元林.正构烷烃奇偶优势在油源对比中的应用[J].石油实验地质,2007,29(1):75～79 [13] 高林,刘光祥.贵州凯里地区下古生界原油油源分析[J].石油实验地质,2008,30(2):187～191 [14] 夏在连,徐国强,刘树根等.米仓山东段-大巴山前缘圈闭构造样式分析[J].成都理工大学学报(自然科学版),2008,35(1):42～46 -
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