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通过大量岩石薄片的观察发现,松辽盆地深层碎屑岩中含有大量的条纹长石,主要为正条纹长石.条纹长石在深层碎屑岩储层形成过程中起到了重要的作用,表现为条纹长石在溶蚀过程中被选择性地溶蚀了主晶钾长石,从而保留了长石骨架,因此,在3600m埋深下,富含条纹长石的碎屑岩还能保留较高的孔隙度.结合沉积相和条纹长石物源的研究,初步总结了登娄库组砂岩有利储层形成模式,预测出深层登娄库组砂岩有利储层发育的主要区域为近条纹长石物源的河道砂岩区.
The observation of a large number of rock slices shows that the deep clastic rocks in the Songliao Basin contain a large amount of stripe feldspar and are mainly positive feldspar.The striated feldspar plays an important role in the formation of deep clastic rock reservoirs, Striped feldspar was selectively eroded by the dissolution of the main crystal K-feldspar in the dissolution process, thus retaining the feldspar skeleton. Therefore, the clastic rocks with stripe feldspar retained a relatively high Porosity.According to the study of sedimentary facies and stripe feldspar provenance, the formation pattern of favorable sandstone reservoirs in Denglouku Formation is summarized, and the main areas for the development of favorable sandstone reservoirs in Denglouku Formation are predicted to be near-striped feldspar Source of the river sandstone area.