Gudao Oilfield Sand Control Technology Research And Applications

According to the problems of sand production and sand control in the Gudao oil field, the mechanisms of sand production in various wells were analyzed, and the sand control methods and matching technology were studied in this thesis.The fine siltstone reservoir is likely to produce sand under larger pressure drops because of its shallow depth, worse compaction and unconsolidated. To process such wells, graduated gravel packing combined with the physical unplugging technology and the clay expanding protection technology was used. During the thermal recovery of heavy-oil, the injection of steam under high pressure and high temperature and the production with high rate, the chemical-mechanical sanding control method before the injection of steam and matching technology were selected. Using such methods can greatly improve the effect of steam soak during the heavy oil recovery.Due to the formation shortfall, collapse outside the casing and the change of the diameter, the sand control in damaged casing wells was discussed in this paper too. Following the principles of the formation treatment outside the casing and the mechanical sand control within the casing, the plastic sand screen, QJFS compound sand control screen and centralizer were studied. The applications showed that such sand control method can improve the production of damaged casing wells and prolong the life of the wells.