Abstract: Dolomiteis scatter in the Anpeng areas of the south-east of the depression.distributed horizontally stable,vertically distributed in the period of upper H3-H2.Rock is composed from hard dolomite,ferrugious calcite primarily.Most of them has the micrite texture.Level lamination,cur-rent bedding and lens primarily are the main microscopic structure which experienced the intense compress function.The dolomite rock reservoir spacetype are various primarily with dissolved hole,Limestone cave,cracks and pore.The physical properties is worse.It is thought that only the dolo-mite hole linking development can prove the largescale dol-omite class oil deposit.