摘要
勘探证实,南堡凹陷滩海地区下古生界碳酸盐岩潜山为含油气潜山,且已成为下一步勘探的重点领域。首先分析整个华北地区早古生代区域沉积背景,明确黄骅坳陷和冀中坳陷该时期处于统一的陆缘浅海沉积环境中;进而以冀中坳陷为参照,利用化石组合及岩电特征对南堡凹陷潜山钻井进行地层划分对比,建立南堡凹陷下古生界标准地层序列;在井—震标定基础上,解释上马家沟组、下马家沟组及寒武系出露范围;结合储层评价结果将奥陶系和寒武系分别划分出5套和6套储盖组合,分析认为下马家沟组储盖组合为下一步潜山勘探有利层系,为南堡凹陷下一步潜山油气勘探提供必要的地质依据和有利指导。
The exploration practice indicated that the lower Paleozoic carbonate buried hills would be favorable oil and gasbearing area in the beach area of Nanpu sag. It will become the hot exploration domain in the future. On the basis of sedimentary environment background in the north China,we consider that depositional environment in the Huanghua and Jizhong depressions was the shallowsea of continental margin at early Paleozoic. According to fossil assemblage and rockelectric features as well as standard sequence of lower Paleozoic in the Jizhong depression,we classify the lower Paleozoic sequences in the drilled well of Nanpu sag,and set up the standard sequence of lower Paleozoic in the Nanpu sag. The distribution range of upper Majiagou, lower Majiagou and Cambrian sequences was interpreted by wellseismic calibration. Ordovician and Cambrian were divided by reservoir evaluation into five and six reservoircap assemblages, respectively. The lower Majiagou assemblage is considered as the future favorable object. It provides the necessary geological evidences and beneficial directions for the buried hills exploration.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2012年第1期68-73,共6页
Natural Gas Geoscience
关键词
南堡凹陷
下古生界
碳酸盐岩潜山
地层序列
储盖组合
Nanpu sag
Lower Paleozoic
Carbonate buriedhill
Stratigraphic sequence
Reservoircap assemblage.
