重庆科技大学学报（自然科学版）2026，Vol.28Issue(2)：10-22,13.DOI:10.19406/j.issn.2097-4531.2026.02.002
东海陆架盆地基岩潜山储层分带特征及其主控因素
Zonation Characteristics and Key Controlling Factors of Bedrock Buried-Hill Reservoirs in the East China Sea Shelf Basin
摘要
Abstract
Through a comprehensive application of analytical methods,including core observation,thin section cast-ing,nuclear magnetic resonance,overburden pressure porosity-permeability,and CT scanning methods,the zoning characteristics and primary controlling factors of bedrock buried hill reservoirs in the East China Sea Shelf Basin are analyzed.The research indicates that:1)The upper part of the bedrock buried hills in the East China Sea Shelf Basin is primarily influenced by weathering,developing clay zones,weathered conglomerate zones,and weathered leaching zones from top to bottom;whereas the lower part is mainly controlled by tectonic activity,featuring inner fracture zones and tight zones.2)The reservoir space of bedrock buried hills is predominantly composed of second-ary pores.The structure of the reservoir space transitions from a dual-porosity(pore-fracture)type to a fracture-dominated type,with overall deterioration in reservoir quality.The main pore size distribution range decreases from 0.10-50 μm to 0.0007-0.05 μm,and the pore structure homogeneity in the weathering-leaching zone is relative-ly poor.3)Mineral composition serves as the material basis for the formation of dissolution pores and tectonic frac-tures in bedrock buried hills.Tectonic activity determines the degree of development of fracture-type reservoir space and also exerts certain control over the connectivity of pre-existing pores/fractures and dissolution processes.Weath-ering-leaching-related dissolution plays a decisive role in enhancing the reservoir quality of dual-porosity(pore-frac-ture)type reservoirs at the top of the bedrock.4)In the gentle slope zone of the bedrock buried hill,the weathered glutenite zone and weathering-leaching zone,along with the broad and gentle areas near the depression-controlling faults,exhibit a greater thickness of weathering-leaching zones.These areas exhibit well-developed dual porosity-fracture reservoir spaces and possess favorable reservoir properties,establishing them as key exploration targets in the upper section of bedrock buried hills.Near fault zones,internal fracture zones characterized by high light min-eral content are also relatively well-developed.These features can create valuable exploration target intervals in the lower section of buried hills.关键词
东海盆地/基岩潜山/潜山纵向分带/储层特征/储层主控因素Key words
East China Sea Basin/bedrock buried hills/vertical zonation of buried hills/reservoir characteristics/main controlling factors of reservoirs分类
天文与地球科学引用本文复制引用
陶良清,朱宇宇,王雷,陈玲,严雪齐,时欣雨,朱郑杰..东海陆架盆地基岩潜山储层分带特征及其主控因素[J].重庆科技大学学报（自然科学版）,2026,28(2):10-22,13.基金项目
国家自然科学基金项目"古新世—始新世极热气候时期咸化湖泊物质分异作用及早期成岩行为研究"(42072140) （42072140）
重庆市杰出青年科学基金项目"极热气候环境下湖泊沉积-成岩系统及油气效应"(CSTB2022NSCQ-JQX0031) （CSTB2022NSCQ-JQX0031）
重庆市教育委员会科技重大项目"极热气候高CO2浓度下湖泊水介质状态及油气富集"(KJZD-M202101502) （KJZD-M202101502）
