| In this paper,Xinjiang Hongshanzui oilfield reservoir step deep profile for research purposes. We synthesized five kinds of crosslinking agent and the two polymers, and existing16kinds of polymer solubility and salt tolerance of evaluation,and screelling of polynlel’gel in the two salinity conditions Gelling Properties to get the best of the polymer gel system,and test the gelling properties of the polylmer gel system in the clean-up mixed with water injection.HCJ-1polymer gel system,we detailed study of the composition of the polymer structure,solution properties and their adsorption retention performance in the core, the drag coefficient, the residual resistance factor and the mechallical stability of the gel system and the thermal stability and laboratory silllulation of performance contl.01and flooding； evaluated the performance of its indoor flooding:through a lot of physical model experiments to study the injection of the transfer drive system,the injection volulme and injection time,the technical parameters of the optimized control and flooding. The findings are as follows:(1)The synthesis of high molecular weight salt type polymer HCJ-1, The aggregate to determine the optimum process parameters:total monomer concentration of20％.initiator concentration of0.15％,the monomer B content of15％,the reaction temperature is35℃and pH7,was synthesized under this condition polymerization Property intrinsic viscosity25.4dl/g.(2)Development of a hydrophobically associating salt polylller HCJ-2. Determine the aggregate of the optimum process parameters: total monomer concentration of25％AM,AMPS and hydropllobic monomer ratio of5:1:0.18, triggering dose of0.25％of the monomer,the reaction temperature was60℃and pH of8,whell the polymer intrinsic viscosity17.2dl/g.(3)Evaluation of the laboratory synthesis of the polymer HCJ-1HCJ-2and the current prqject in the application of better polynler solubility and saIt tolerance of the HCJ-1under different salinity relatively the highest apparent viscosity to determine the HCJ-1-based agent to carry out the study of the polylher gel system performance.(4)A detailed study of the general performance of the HCJ-1polynler solution, evenly branched-chain structure of the polymee main chain,was a comb.Have a stretch of the molecular structure of polymer in water alld salt water.good salt tolerance.(5)Compared the phenolic resin and crosslinker(JL-1),chromium cross-linking agent(JL-2),aluminum crosslinking agent(JL-3).organic phenol cross-linking agent (JL-4) and Zr-associated agent (JL-5) performance of the five cross-linking agent and HCJ-polymer gelling. Indoor experimental study, preferably the best cross-linking agent chromium cross-linking agent, and optimize the basic formula of chromium crosslinking agent, when the ligand acid, acetic acid:lactic acid is1:1.75, the gel can maintain a high strength and suitable gelling time.(6) HCJ-1polymer gel system in the injected water and formation water salinity conditions Gelling Properties, the basic formula to meet progressively deep profile with the best polymer gel system, that is, strong gel segment plug the formula as follows:2.0%‰polymer (HCJ-1)+0.35%of organic chromium crosslinker; formula is in a strong gel segment plug:1.5‰polymer (HCJ-1)+0.3%organic chromium crosslinking agent; weak gel slug recipe0.10‰polymer (HCJ-1)+0.08%organic chromium crosslinker+0.10%coagulant.(7) Studied the adsorption characteristics of the polymer HCJ-1stratigraphic core static and dynamic, three slug polymer retention volume small, not gelling properties of the polymer gel impact. The polymer gel system has better shear resistance, and long-term stability. Large injection of the polymer gel(8) The permeability of the cores can adjust the profile, strong gel slug has the highest block rate can reach92.35%, three species of slug gel drive for drive recovery than water were increased, water flooding can be increased by5%, one of the largest enhanced oil recovery10.0%, and core penetration penetration, the lower the higher the final recovery.(9) A total of12injection wells in the test area deep profile, by the efficiency of the32oil wells, the efficiency of100%, increasing oil45t/d,9336.43tons cumulative absolute incremental oil, the declining balance method to calculate the cumulative incremental oil19000ton. All efficiency of the well, the central well of the incremental oil is3.7times the edge wells to increase oil. |
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