| The Qaidam Basin is rich in oil and gas resources,but the proven degree of oil and gas is very low.Researchers have done a lot of oil and gas exploration work in the area.The development and distribution of karst is of great help to oil and gas exploration,and no detailed investigation of the karst in the study area is carried out before me.I have collected all the geological,meteorological,hydrological and hydrogeological data of the Delingha fault zone.A total of 78 days of field field trips during the three years from the beginning of 2014 were found in the Juelaogou area in the eastern part of the Qaidam Basin,the daily mining mining area,the Limei area,the vicinity of the Barker River and the Gahai Nanshan area.A karst outcrop,the location of 14 large caves,karst strength,karst thickness,control fissures and other factors to carry out field survey,take pictures,and detailed description,made a large number of research areas of surface karst development of detailed information,finishing the study Distribution of surface karst in the area.And through the information obtained on the reasons for the formation of each outcrop detailed analysis.Through the field investigation of the study area,three karst spring outcrops were found,and the three springs were described and photographed in detail.The karst spring was sampled and the water quality analysis experiment was carried out.The chemical composition of karst water was determined,and the results were analyzed and the water chemistry classification map was drawn.The results show that the karst spring mineralization degree in the study area is not high,most of them are fresh water and partly brackish water.Three karst springs belong to HCO3 · Ca type groundwater.The main source of water is the dissolution of calcium carbonate and dolomite in marble in the cypress mountain area.A detailed description of the underground karst in the area of the dead wolf ditch,Wanga show,the Gahai Nanshan,the cypress mountain,Which indicates the depth of drilling and the strata of the underground karst.The porosity and permeability tests were carried out to study the porosity and permeability characteristics,and the conclusion that the karst reservoir conditions were generated near the Delingha fault was obtained.In this paper,the distribution and development characteristics of surface and subsurface karst and karst water near Delingha fault are described in detail.For the future for the study area karst reservoir proven and karst water development and utilization of the cornerstone. |
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