现代地质2025，Vol.39Issue(3)：787-800,14.DOI:10.19657/j.geoscience.1000-8527.2024.135
济阳坳陷太古宙基岩储层特征及油气成藏模式
Archean Basement Rock Reservoir Characteristics and Hydrocarbon Accumulation Model in Jiyang Depression
摘要
Abstract
Archean basement rock in Jiyang Depression has gradually become one of the focuses of hydrocarbon exploration.At present,the research on the characteristics of basement rock reservoir and the conditions of hy-drocarbon accumulation in this area is not mature.On the basis of core observation,thin section identification,macroelement analysis,XRD,scanning electron microscopy,nuclear magnetic resonance and well seismic data analysis,the development characteristics of Archean basement rock reservoir and favorable geological conditions for hydrocarbon accumulation in Jiyang Depression are studied.The results show that the rock types of Archean basement rock reservoir in Jiyang Depression are mainly granites,gabbro,felsic gneiss,plagioclase amphibolite and cataclastic rock.Developed weathered crust type and inside type reservoir;The physical properties of the weathered crust are best in the semi-weathered zone,and the reservoir space is the solution pore,solution frac-ture,structural fracture and solution expansion fracture.The porosity of the reservoir is concentrated in 2.2％～3.8％,the average permeability is 2.79 × 10-3 μm2,and the average density of imaging logging fractures is 1.4 bars/m.The weathering crust is dominated by Class Ⅱ reservoirs,followed by class Ⅰ reservoirs.The in-side type reservoir space is dominated by structural fractures,followed by a small number of dissolution frac-tures,with porosity ranging from 1.1％to 1.9％,average permeability of 1.69 × 10-3 μm2,and average densi-ty of imaging logging fractures of 0.6/m,which is dominated by Class Ⅲ reservoirs,followed by class Ⅱ reser-voirs.The basement rock reservoir in Chengbei area is adjacent to the hydrocarbon-generating depression of the Yellow River Estuary,and hydrocarbon migrated along the top unconformity and tectonic fault of the Archean basement rock buried hill,overlying the lower Paleozoic Cambrian-Ordovician carbonate rocks,and the mud-stones of the Paleogene Sha3 and Sha4 provide effective sealing.Finally,hydrocarbon accumulated in weathe-ring crust and inside fractures at the top of basement rock during the Ming Huazhen period(3.0～1.5 Ma)of Neogene Pliocene.The research results are of great significance to the hydrocarbon exploration of basement rock in Jiyang Depression.关键词
济阳坳陷/太古宙/基岩储层/成藏模式Key words
Jiyang depression/Archean/basement reservoir/hydrocarbon accumulation model分类
地质学引用本文复制引用
穆星,孟涛,石泉清,李继岩,刘鹏,方正伟,赵贤,牛花朋..济阳坳陷太古宙基岩储层特征及油气成藏模式[J].现代地质,2025,39(3):787-800,14.基金项目
中国石油化工股份有限公司研究项目"济阳坳陷太古界潜山油气成藏条件及目标评价"(P22067). （P22067）
