| 川西坳陷中段上三叠统须家河组储层沥青地球化学特征及成因研究 |
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| 引用本文： | 罗小平,曹军,沈忠民.川西坳陷中段上三叠统须家河组储层沥青地球化学特征及成因研究[J].矿物岩石,2009,29(1). |
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| 作者姓名： | 罗小平 曹军 沈忠民 |
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| 作者单位： | 成都理工大学"油气藏地质及开发工程"国家重点实验室,四川,成都,610059 |
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| 基金项目： | 国家自然科学基金，成都理工大学油气藏地质及开发工程国家重点实验室开放基金 |
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| 摘 要： | 川西坳陷上三叠统须二、须四段致密砂岩的溶蚀孔洞、裂缝及砂岩层理界面上分布大量的沥青,沥青的热演化程度极高,须二段达到干气阶段,须四段达到湿气一干气早期阶段;经过针对砂岩中层理界面及裂缝、溶孔洞中充填的沥青及泥岩层裂缝中充填沥青取样的有机地球化学指标分析后显示:沥青具有较低的H/C、O/C比,须二段沥青残余生烃能力极小,须四段沥青还具有较大的残余生烃潜力;须家河组须二、须四段沥青为马鞍塘-小塘子组与须二段海湾相油型烃源岩在生油窗期成的古油藏,在后来的高温条件下裂解成天然气后残留物;须二,须四的古油藏构成了川西坳陷上三叠统须家河组天然气重要的气源.
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| 关 键 词： | 储层沥青 古油藏 地球化学特征 川西坳陷 |
GEOCHEMICAL CHARACTERISTICS AND GENESIS OF RESERVOIR BITUMEN OF XUJIAHE FORMATION IN THE UPPER TRIASSIC OF WESTERN SICHUAN DEPRESSION |
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| LUO Xiao-ping,CAO Jun,SHEN Zhong-min.GEOCHEMICAL CHARACTERISTICS AND GENESIS OF RESERVOIR BITUMEN OF XUJIAHE FORMATION IN THE UPPER TRIASSIC OF WESTERN SICHUAN DEPRESSION[J].Journal of Mineralogy and Petrology,2009,29(1). |
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| Authors: | LUO Xiao-ping CAO Jun SHEN Zhong-min |
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| Institution: | LUO Xiao-ping,CAO Jun,SHEN Zhong-minState Key Laboratory of Oil , Gas Reservoir Geology , Exploitation,Chengdu University of Technology,Chengdu 610059,China |
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| Abstract: | In the Upper Triassic of western Sichuan depression,plenty of bitumen was distributed in the dissolved pores,fractures and the sandstone bedding interfaces of alternate marine-continental tight sand in the 2nd and 4th Members of Xujiahe Formation.The thermal evolution degree is extremely high,with the 4th Member in the early stage of wet-dry gas,and the 2nd Member in late dry gas stage.The value of H/C and O/C is low for the bitumen.In the 4th Member,it still possesses strong hydrocarbon generation ability,... |
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| Keywords: | reservoir bitumen palaeo-oil reservoir geochemical characteristics western Sichuan depression |
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