Characteristics of source rocks from Carboniferous-Permian in Songliao Basin and its peripheral area,northeastern China
Characteristics of source rocks from Carboniferous-Permian in Songliao Basin and its peripheral area,northeastern China
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发表时间：
2011
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通讯作者：
Zeng Yan-tao
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作者：
Zeng Yan-tao
在松辽盆地及周缘地区，上古生界构造层长期以来被认为是中、新生代盆地的褶皱变质基底，因此在油气勘探中被忽视。通过近3年的野外和室内研究表明，研究区上古生界除局部地区存在不同程度的动力接触变质作用和热变质作用外，不存在区域性变质作用。初步调查表明，区内存在石炭系—二叠系4个烃源岩层，由上至下依次为：上二叠系（林溪组、索伦组）、中二叠系（浙寺组、吴家屯组）、上石炭系—下二叠系（本八图组、阿木山组）、下石炭系（白家店组、洪水泉组）。其中上二叠统（林西组）和中二叠统（浙西组）分布广泛，黑色泥质岩最大单层厚度可达几百米，累积厚度从几百米到几千米不等。主要有机地球化学指标（有机碳酸盐、成熟度和干酪根类型）反映两组烃源岩处于中等或较好水平。这两组是松辽及周缘石炭系—二叠系的主要生烃层，具有良好的油气资源前景，将成为中国东北油气探区新的战略成功层。
In the Songliao Basin and peripheral area,the neopaleozoic tectonic layers are recognized as the folding and metamorphic basement of Mesozoic and Cenozoic basins for a long time,so they are neglected in the oil exploration.By the study in the field and laboratory for about 3 years,it indicates that there is no regional metamorphism in the Upper Paleozoic of the study area except for the dynamitic contact metamorphose and thermal metamorphism with various degree in some areas.The preliminary investigation indicates that it exists four source rock layers from Carboniferous to Permian in the area,from upper to lower including: Upper Permian(Linxi Formation,Suolun Formation),Middle Permian(Zhesi Formation,Wujiatun Formation),Upper Carboniferous-Lower Permian(Benbatu Formation,Amushan Formation),Lower Carboniferous(Baijiadian Formation,Hongshuiquan Formation).Among them,the Upper Permian(Linxi Formation) and Middle Permian(Zhesi Formation) spread widely in the area,the max monolayer thickness of the black muddy rock from which gets to several hundred meters and the accumulated thickness from several hundred meters to several kilometers.The main organic geochemical indices(the organic carbonate,the maturity and the type of kerogen) reflect the source rocks from the two formations get the rank of middle or good.The two formations are the main generating hydrocarbon layers in the Carboniferous-Permian of the Songliao and peripheral area,which shows the good prospect of oil and gas resource,would become the new strategic succeed strata in the northeast oil and gas exploration region of China.