吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (4): 991-1005.doi: 10.13278/j.cnki.jjuese.20200189
叶涛1,2, 王清斌1, 黄志1, 孙哲1, 李飞1, 陈安清2
Ye Tao1,2, Wang Qingbin1, Huang Zhi1, Sun Zhe1, Li Fei1, Chen Anqing2
摘要: 以钻井、测井、地震以及岩心、薄片资料为基础,在划分三级层序的基础上,探讨了渤海西南海域下古生界层序地层特征及其对岩溶储层的控制作用。结果表明:1)三级层序界面附近发育碳、氧同位素负异常以及自然能谱Th/K正异常,基于此特征将下古生界划分为21个三级层序;2)白云岩是研究区主要的储集岩性,层序通过控制垂向岩性的变化进而控制了优质储层的发育;3)将白云岩发育的12个三级层序定义为"优势储集层序",加里东期构造不整合与12个"优势储集层序"耦合控制了潜山型储层规模及其产能高低;寒武系内发育以溶蚀孔隙为主的内幕型岩溶储层,亦限定发育于"优势储集层序"之中。实际勘探中,优选风化界面与"优势储集层序"耦合区域优先钻探,同时兼顾内幕型储层,其是今后该区高效勘探的关键。
中图分类号:
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