Xây dựng mô hình xử lý giếng khoan điển hình bị suy giảm năng suất khai thác trong vùng đá cứng nứt nẻ, mực nước động nằm sâu phục vụ cấp nước sinh hoạt
Abstract
Due to the geology and hydro-geoloy in Binh Phuoc province leading to the almost of the wells for water supply in to the unconsolidated rock layers and often to be small water discharge and to be declined after some years. The authors have studied and proposed the improvemnet solutions for the wells. The improved well has been chosen at Ong Nang area, Vuon Buoi group, Loc Thien village. The depth of old well is 115m with diameter of 110 mm. The chosen solution is open diemeter of the old well form 110 to 140 mm by the drill and to be flooded the well with HCL 36% in 6 hours in order to dessolve the resides to be adhered to the rock fissures. The stable water discharge has been 2,3 m3/ hour after improved well instead of 1,37 m3/hour before.
Key words: hydro-geoloy, declined well, improved well, drilling technology
