哈得逊隆起下石炭统基准面旋回与储集层预测
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摘要
依据基准面旋回原理和方法,综合利用哈得逊地区的钻井、测井、地震以及地球化学资料,在研究区下石炭统识别出1个Ⅰ型和3个Ⅱ型层序界面,将哈得逊地区下石炭统划分为3个中期基准面旋回:SC_1、SC_2、SC_3,对应于早石炭世海侵的3个海进-海退旋回。SC_1旋回以滨岸砂坝沉积为主,而SC_2、SC_3旋回发育潮坪沉积体系。研究认为,SC_1旋回滨岸砂岩及SC_2下降半旋回的潮间带薄层砂岩为有利储集砂体,是地层-岩性型油气藏的重点勘探目标。
Based on principle and methods for base level cycle, the drilling, well logging, seismic and geochemical data from Hadexun area are analyzed. One I-type and three II-type sequence interfaces of Lower Carboniferous are recognized, and three medium-term base level cycles (SC_1, SC_2, SC_3) corresponding to three transgressive-regressive cycles are classified. SC_1 cycle is dominated by longshore bar deposit, while SC_2, SC_3 by tidal flat system. The study shows that SC_1 sandstone and SC_2 flagstone are favorable reservoir sand bodies and could be as key targets for exploration of stratigraphic and lithologic oil-gas pools.
Based on principle and methods for base level cycle, the drilling, well logging, seismic and geochemical data from Hadexun area are analyzed. One I-type and three II-type sequence interfaces of Lower Carboniferous are recognized, and three medium-term base level cycles (SC_1, SC_2, SC_3) corresponding to three transgressive-regressive cycles are classified. SC_1 cycle is dominated by longshore bar deposit, while SC_2, SC_3 by tidal flat system. The study shows that SC_1 sandstone and SC_2 flagstone are favorable reservoir sand bodies and could be as key targets for exploration of stratigraphic and lithologic oil-gas pools.
引文
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[3] 邓宏文．美国层序地层研究中的新学派——高分辨率层序地层学[J]．石油与天然气地质，1995，16（2）：89--97．
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