Borehole Databases and 3D Geological Model of JurassicCretaceous Strata in Dongsheng Area, North Odors Basin

The integrated application of existing borehole data has become an urgent need with further  prospecting  of  sandstone-hosted  uranium  deposits.  In  this  paper,  a  comprehensive borehole  database  of  Jurassic –Cretaceous  strata  in  Dongsheng  area  (also  referred  to  as  the Database)  was  established  under  the  guidance  of  the  new  ideas  and  methods  of “secondary development  and  utilization  of  existing  coalfield  borehole  data” and “coal-uranium  joint exploration” .  In  detail,  the  borehole  attributes  of  Dongsheng  area  were  collected.  Then  key borehole data related to coalfields and uranium deposits were successively collated, scanned, converted  into  desired  data  types,  input  into  data  tables,  and  integrated  into  databases according  to  unified  standards  and  requirements.  As  a  result,  the  Database  was  established, achieving unified management of borehole data from multiple sources. The Database consists of  three  Access  databases  and  corresponding  result  maps.  Each  of  the  Access  databases contains  eight  data  tables,  namely Basic information of a borehole, Beds based on comprehensive histograms, Beds based on lithologic description, Names and codes of strata, Data from logging curves, Configuration of logging curves, Bending degree measurement of boreholes,  etc.  These  data  tables  respectively  contain  detailed  data  of  the  lithology  from geologic records, beds, rock colors, logging curves, hydrogeological beds, borehole sampling, and bending degree measurement. According to application and practices, the Database enables a quick generation of critical basic geologic maps such as well profiles and the isoline maps of the elevations of roofs and floors, stratum thickness, sand-body thickness, and sand content of target strata bearing coal and uranium. This will increase the data utilization efficiency and
provide critical data for the exploration and research of uranium deposits.