Screening and field test of crosslinking system for conditioning and driving in offshore low-temperature and high-permeability reservoirs
In the late stage of water-driven exploitation in high permeability reservoirs,the non-homogeneity between layers was enhanced,the dominant channel was obvious,the water runoff was serious,and the production decreased rapidly.Under the demand of oilfield production stabilization and upward production,profile control and flood control measures were becoming more and more important,and the combination of polymer crosslinking system driving technology has gained wide attention.In this paper,the polymer cross-linking system for low-temperature and high-permeability reservoir conditions for the experimental study of gel formation,preferred H-type dry powder polymer,heavy chromium system cross-linking agent,solid phenol cross-linking agent and liquid phenol cross-linking agent and other systems for the compatibility and performance of the gel formation were studied,the results showed that the H-type dry powder polymer concentration range of 2500～3000mg/L,solid phenol cross-linking agent concentration range of 1000～2000mg/L,when the cross-linking system was formed,the system can form a gel.This crosslinking system had a short gelation time and controllable gelation strength,and it was suitable for the drive-conditioning crosslinking system in low-temperature and high-permeability reservoir.The system was applied in Q oilfield B10 well group with good results,the water content of the well group was reduced by 2.6％,and the oil was increased by 5407 square meters.
low temperaturehigh-permeabilitycrosslinking systemprofile control
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