The pattern,scale,distribution, planar development of main trough microfacies of fanhead and its sand and gravel in lower Karamay formation,as well as oil-gas distribution,are described.

• 对克下组形成的扇顶主槽微相带及其砂砾体的形态、规模、分布范围、平面展布和油气分布进行了描述。