Analysis of reservoir choke and broken down of Tong Liao uranium production

摘要

This project aims at the phenomenon of increasing injection pressure of injection wells of the Tong Liao Uranium SW-8E test wells group, carries out the research of reservoir choke and broken down. By analysis of the water quality of injected and produced fluid through the test wells, scaling prediction, physical simulation experiments and other research, we find the main cause of clogging injection wells: Bacteria blockage, scale blockage, solids blockage and reservoir clay swelling blockage. Meanwhile according to the main reasons of reservoir pollution we have carried on pointed research of broken down, excogitate a better integrated and targeted reservoir choke Blocking Remover. Through on-site implementation, the injection pressure is reduced by 0.3-0.4MPa (maximum allowable injection pressure is 2.0MPa), well purge period is extended from three days to three months, this project solves the problems and achieves very good results.