公开(公告)号：US20220325164A1

公开(公告)日：2022-10-13

申请号：US17698223

申请日：2022-03-18

申请人： China University of Petroleum(East China)

发明人： FUHUA WANG ,  LUYI WANG ,  WEIDONG ZHANG ,  HAITAO ZHU ,  ZEZHUANG SUN ,  ZHIHAO ZHANG ,  ZHIZUN WANG ,  DUNYUAN YU ,  YANG WANG ,  HAIYANG LIU

IPC分类号： C09K8/506 ,  E21B43/08 ,  C09K23/54

摘要： A ternary water control and gas recovery method suitable for an unconsolidated siltstone gas reservoir is provided. It includes the following steps: first, running a silt control screen pipe manufactured by an interface hydrophobic modification into a wellbore to realize wellbore water control and silt control; second, filling a surface hydrophobic modified gravel in an annular space between the silt control screen pipe and the wellbore to form a hydrophobic gravel packing layer for water control and silt control; third, injecting a wetting agent aqueous solution into a stratum, and performing a hydrophobic modification on a gas reservoir seepage channel surface to realize in-situ water blocking and silt migration of the unconsolidated siltstone gas reservoir, and then closing a well for a preset time before exploitation.