琼东南盆地崖城组聚煤环境及成煤规律
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摘要
综合利用钻井、岩心及地震等资料,结合沉积学及层序地层学相关方法和理论,对琼东南盆地崖城组聚煤环境特征及成煤作用展开研究。琼东南盆地崖城组煤层主要见于潮坪潮上带和潮间带的泥炭坪、辫状河三角洲平原泥炭沼泽及扇三角洲平原泥炭沼泽。以聚煤环境为主线,考虑到古构造的影响,总结出琼东南盆地的聚煤模式:潮上带及潮间带面积最大,为主要的聚煤环境;缓坡带成煤沉积体系的分布广于断控陡坡带;崖二段具有较强的聚煤潜力。
Based on the drilling data,core data and seismic information,this paper discusses about features of coal-accumulating environment and coal-forming of Yacheng formation in Qiongdongnan basin with application of methods and theories of sequence stratigraphy and sedimentology.Coal seams of the Yacheng formation are mainly found in peat flat of supralittoral zone and intertidal zone of tidal flat,peat swamps of the braided river delta plain and fan-delta plain.Focusing on the coal-accumulating environment and considering the influence of paleostructure,the coal-accumulating model for Qiongdongnan basin is developed as following: the supralittoral zone and intertidal zone in tidal flat are of the largest area,being the main coal-accumulating environment;the distribution of coal-forming sedimentary system in gentle slope zones is broader than that in steep slope zones controlled by faults;the second member of Yacheng formation is of greater potentiality of coal-accumulating.
Based on the drilling data,core data and seismic information,this paper discusses about features of coal-accumulating environment and coal-forming of Yacheng formation in Qiongdongnan basin with application of methods and theories of sequence stratigraphy and sedimentology.Coal seams of the Yacheng formation are mainly found in peat flat of supralittoral zone and intertidal zone of tidal flat,peat swamps of the braided river delta plain and fan-delta plain.Focusing on the coal-accumulating environment and considering the influence of paleostructure,the coal-accumulating model for Qiongdongnan basin is developed as following: the supralittoral zone and intertidal zone in tidal flat are of the largest area,being the main coal-accumulating environment;the distribution of coal-forming sedimentary system in gentle slope zones is broader than that in steep slope zones controlled by faults;the second member of Yacheng formation is of greater potentiality of coal-accumulating.
引文
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[2]沈怀磊,秦长文,王东东,等.琼东南盆地崖城组煤层的识别方法[J].石油学报,2010,31(4):587-589.
[3]米立军,王东东,李增学,等.琼东南盆地崖城组高分辨率层序地层格架与煤层形成特征[J].石油学报,2010,31(4):535-540.
[4]李增学,何玉平,刘海燕,等.琼东南盆地崖城组煤的沉积学特征与煤模式[J].石油学报,2010,31(4):543-547.
[5]龚再升,李思田.南海北部大陆边缘盆地分析与油气聚集[M].北京:科学出版社,1997.
[6]张韬.中国主要聚煤期沉积环境与聚煤规律[M].北京:地质出版社,1995.
[7]黎玉战,傅太华.松辽盆地煤层在地震剖面上的特征[J].成都理工学院学报,1994,21(2):94-98.
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