石油实验地质Issue(2)：150-156,163,8.DOI:10.7603/s40972-015-0024-4
渤海海域渤南低凸起碳酸盐岩潜山储层特征及形成机制
Characteristics and formation mechanisms of buried hill carbonate reservoirs in Bonan Low Uplift, Bohai Bay
摘要
Abstract
The carbonate rock buried hills are important exploration and development targets in the Bonan Low Up⁃lift of the Bohai Bay. Based on drilling, seismic, core, thin section and well logging data, the characteristics and formation mechanisms of the buried hill carbonate reservoirs were studied. They were divided into two reservoir sys⁃tems, including the weathering crust karst reservoir and the inner dissolution reservoir. Dolomites were dominant, while limestones took second place. Reservoir space mainly included intercrystalline porosity, fractures and dis⁃solved pores. The results of physical characteristic analysis showed that inequality grain dolomites, powder crystal-aplitic dolomites and silt crystal dolomites were better than limestones. Sedimentary facies, karstification and tec⁃tonic disruption were recognized as the main formation mechanisms of the buried hill carbonate reservoirs in the Bo⁃nan Low Uplift. (1) Sedimentary facies were the basis of reservoir formation. Favorable reservoirs mainly distribu⁃ted in the dolomites and limestones of restricted sea, intertidal flat and tidal flat facies. (2) Karstification was the key to the formation of buried hill carbonate reservoirs. Weathering crust karst reservoirs and inner dissolution res⁃ervoirs developed within 0-250 and 0-150 meters under the top of the unconformity. Favorable karst reservoirs de⁃veloped in the karst highland and karst slope of karst palaeogeomorphology. (3) Tectonic disruption was the con⁃nection of the formation of buried hill carbonate reservoir. Semi⁃filled or unfilled structural fractures and dissolution fractures provided important reservoir porosity and migration channels. When combined with dissolution pores, they formed fracture-pore and pore-fracture reservoirs, which improved reservoir performance.关键词
碳酸盐岩潜山/储层特征/形成机制/岩溶作用/渤南低凸起/渤海湾盆地Key words
carbonate rock buried hill/reservoir characteristics/formation mechanism/karstification/Bonan Low Uplift/Bohai Bay Basin分类
能源科技引用本文复制引用
于海波,王德英,牛成民,李龙..渤海海域渤南低凸起碳酸盐岩潜山储层特征及形成机制[J].石油实验地质,2015,(2):150-156,163,8.基金项目
国家科技重大专项（2011ZX05023－006－002）资助。 （）
