摘要
Chelif盆地是阿尔及利亚西北部的中一新生代叠合盆地，中一新生代地层中发育有利的生储盖组合。上白垩统、上中新统泥灰岩是主力烃源岩，中新统的（辫状、扇）三角洲砂岩为有利储层，中新统广泛发育的泥岩、膏岩和灰岩等形成良好的盖层。为了突破盆地半个世纪以来的勘探空白，采取了圈闭地质风险评价方法来提高圈闭的命中率。圈闭地质风险评价法是在油气地质构造、生油、储层、生储盖组合和对油气运移研究的基础上，制定各风险评价因素标准的工作。在经过圈闭地质风险评价之后，下中新统底部找到了2个Ⅰ类圈闭和3个Ⅱ类圈闭，上中新统底部找到了2个Ⅰ类圈闭和1个Ⅱ类圈闭，为盆地的下一步勘探指明了方向。
Chelif Basin is a Mesozoic-Cenozoic superimposed basin in the northwest of Algeria, and moreover potential combination of source-reservoir-cap rocks is developed in Mesozoic-Cenozoic strata. Upper Cretaceous and Upper Miocene muddy limestones are the main source rocks, Miocene （braided, fan） delta sandstones are favorite reservoir rocks, and the widely-developed Miocene mudstone, gypsum and limestone turn into good cap rocks. In order to make a breakthrough for half a century in this basin, the geologic risk evaluation （ including the standards of evaluating factors） of the traps are conducted on the basis of studies of petroleum geologic structures, the above combination and petroleum migration. After that, two first-grade traps and three second-grade traps are found in the bottom of Lower Miocene, and two first-grade traps and one second-grade trap are discovered in the bottom of Upper Miocene, thus the next step of exploration direction of the basin is made clear.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2010年第1期16-20,共5页
Petroleum Geology & Oilfield Development in Daqing
关键词
Chelif盆地
中新统
成藏特征
圈闭
地质风险评价
Chelif Basin
Miocene
reservoir-forming characteristic
trap
geologic risk evaluation
