Abstract
In Luodai gas field, people adopt positive electricity glue mud system and porous - throat temporary plugging agent that protects reservoirs, and corresponding technology to perform drilling, an accomplishment of drilling is with perforation method. After perforating, the perforation fluid is not completely discharged, and the salt crystal precipitation blocks the pipeline, leading damage to reservoir, and ecological environment will be damaged as well. To plan and implement the process of recycling and protecting the reservoir has become a problem to be solved. Based on the analysis of the composition of flowback fluid, combined with the re-use indicator of liquid waste back on the site, we decide to remove impurities with membrane at first, and then add processing agent of 0.4%DRS, 0.6%RT, 0.6%ZPJ-2, 1.0%FPJ-1, 0.6%HSJ-1 for performance tuning, so as to realize the recovery and reuse of perforating fluid and protect the oil and gas layer.
