合肥盆地侏罗系低渗透致密砂岩储层的成因与优质储层发育的潜力
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摘要
合肥盆地侏罗系地层厚度大，分布面积广，储集砂岩发育，但砂岩储集物性与孔隙结构均较差，现有样品分析表明储层主要为低渗透致密层，仅上侏罗统具中等的储集性能．作者通过薄片观察、阴极发光、扫描电镜等多方面测试与综合分析研究对侏罗系砂岩低孔隙、低渗透性的原因进行了详细的讨论，并根据成因划分了四种储集类型，不同的储集类型具不同的储集潜力。结合有机地球化学、地震地层学等研究认为合肥盆地侏罗系地层具优质砂岩储层发育的潜力，并指出优质储层发育的方向。
Jurassic reservoir sand body was widely develOped in Hefei Basin, But the porosity and permeability and pore structure of sandstone are all worse- The analysis on available samples reveals that the sand body mainly belongs to low-permeability tight reservoirs, and only the Upper Jurassic has moderate storage quality. In this paper,the genesis of tight Jurassic sandstone reservoirs is discussed in detail 'by means of section observation, cathodoluminescence test, scaning electron microscope test etc. and comprehensive analyses and investigations. Four types of reservoirs are classified based on their origin. Reservoir potential is varied with different reservoir types. Combined with Organic Geochemistry,Seismic Stratigraphy and so on,the conclusion that the Jurassic strata in Hefei Basin have the potential of developing goOd-quality sandstone reservoirs is Obtained. The directiOn of developing good-quality reservOirs is also pointed out.
Jurassic reservoir sand body was widely develOped in Hefei Basin, But the porosity and permeability and pore structure of sandstone are all worse- The analysis on available samples reveals that the sand body mainly belongs to low-permeability tight reservoirs, and only the Upper Jurassic has moderate storage quality. In this paper,the genesis of tight Jurassic sandstone reservoirs is discussed in detail 'by means of section observation, cathodoluminescence test, scaning electron microscope test etc. and comprehensive analyses and investigations. Four types of reservoirs are classified based on their origin. Reservoir potential is varied with different reservoir types. Combined with Organic Geochemistry,Seismic Stratigraphy and so on,the conclusion that the Jurassic strata in Hefei Basin have the potential of developing goOd-quality sandstone reservoirs is Obtained. The directiOn of developing good-quality reservOirs is also pointed out.
引文
1郑浚茂,庞明.碎屑储集岩的成岩作用研究.武汉:中国地质大学出版社,1989
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