Abstract
A sandstone unit of the Sergi Formation in the region of Cocorobo - Bahia was selected as an experimental area for an appraisal of the feasibility of artificial injection of water in sedimentary underground reservoirs of the semiarid region of the Brasilian Northeast. Geological mapping of the region showed that these sandstones occur intercalated with argillaceous lithologies in a block-faulted structure, a quite common framework in that region. Some fault zones are impervious due to silicification along the planes of rupture. The threedimensional geometrical configuration of the formation were delineated using AFMAG (audio-frequency magnetic), electrical and seismic refraction methods. The AFMAG measurements yielded a very good delineation of the fault systems of the area. Electrical soundings and seismic profilings defined the geometry of the reservoir,and gave qualitative informations about its boundaries and the hydrological properties of the sandstones at depth. Direct observations, in a well drilled through the formation, showed that the reservoir is undersatured under the conditions prevailing in that semiarid environment.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
