摘要
利用微米CT扫描、背散射扫描电镜二维成像(Maps)、全岩矿物定量分析(Qemscan)和三维孔隙数字岩心建模技术,结合岩心、薄片、物性等常规实验手段对渤中19-6潜山变质岩储层的孔隙微观特征及其发育控制因素进行了研究。结果表明,潜山变质岩储层储集空间主要为溶蚀孔、微裂缝和构造裂缝,以微米级孔隙为主,孔隙半径区间主要为0.3~5μm,裂缝开度存在0.3~10μm、30~100μm、300~1000μm多个峰值区间。分析认为,潜山变质岩储层孔隙结构受岩性、溶蚀和多期次裂缝改造作用控制,脆性矿物含量高、燕山期和喜山期裂缝发育,溶蚀作用强,有利于孔隙发育。
With the assistance of conventional experimental methods such as cores,thin slices,and physical properties,the experimental techniques of micron CT scan imaging,backscattered scanning electron microscope two-dimensional imaging(Maps),quantitative analysis of whole-rock minerals(Qemscan),and three-dimensional pore digital core modeling are applied to research on the pore microscopic characteristics and controlling factors of the metamorphic rock reservoir of the buried hill in Bozhong 19-6. The results show that the reservoir spaces of the buried hill metamorphic rock reservoir are mainly dissolution pores,micro-fractures,and structural fractures. The pore radius is mainly at the micron level,and the range are from 0.3 μm to 5 μm. The width distribution of fractures has multiple peaks: 0.3 to 10 μm,30 to 100 μm,and 300 to 1 000 μm. The analysis shows that the pore structure of metamorphic rock reservoirs in buried hills is controlled by lithology,dissolution,and multi-stage fractures. The high content of brittle minerals,fractures developed in the Yanshan and Himalayan periods,and strong dissolution are all conducive to the development of pores.
作者
齐玉民
QI Yumin(CNOOC Energy Technology&Services Limited,Tianjin 300452,China)
出处
《复杂油气藏》
2022年第2期12-16,共5页
Complex Hydrocarbon Reservoirs
关键词
储层
数字岩心
基岩潜山
渤中19-6气田
渤海海域
reservoir
digital core
bedrock buried hill
Bozhong 19-6 Gasfield
Bohai Sea area
