中文摘要：

针对GY油田裂缝性低渗低温高矿化度的油藏特征，以三氯化铬、氢氧化钠、乙酸、胡萝卜酸为原料合成交联剂几．1。以成胶时间和成胶强度为评价指标，通过筛选聚合物（HPAM）相对分子质量以及HPAM、JL-1浓度，得到低温高矿化度油藏弱凝胶调驱体系KY-1，并测定KY-1体系的抗盐性和耐剪切性，对KY-1体系封堵驱油效果进行评价。结果表明，适用于GY油田KY-1弱凝胶调驱体系的最佳配方为：T114油区地层水＋3000mg／LHPAM（M=1400x10）＋500mg／L儿．1。地层水矿化度为40g／L时，弱凝胶体系在60h内迅速成胶，成胶黏度达30Pa．s＇耐盐性较好。在剪切速度200S-1、27℃条件下剪切120min后，体系成胶黏度为25600mPa·s，成胶黏度损失率为18．99％，抗剪切性较好。对裂缝性岩心的平均封堵率为88．7％，采收率增幅平均值为12．1％。图2表5参5

英文摘要：

Aimed at the low temperature and high salinity condition of low permeability fractured reservoir in GY oilfield, the crosslinker JL-1 was synthesized by three chromium chloride, sodium hydroxide, acetic acid and daucic acid. Then with gelling time and gel strength as evaluation indexes, a weak gel profile control system KY-1 in low temperature and high salinity reservoirs was prepared by regulating the relative molecular mass of polymer （HPAM） and the concentration of HPAM and JL-1. The performance of salt tolerance and shear resistance of KY-1 was investigated, and the plugging capacity and oil displacement efficiency of KY-1 was estimated. The results showed that the best formula of KY-1 weak gel flooding system which was applied to GY oil field was： T114 oil formation water, 3000 mg/L HPAM （M= 1400 x 10^4） and 500 mg/L JL-1. When the salinity of formation water was 40 g/L, the weak gel system could gelatinize rapidly in 60 hrs with 30 Pa. s gel strength and good salt tolerance. The system also had good sheering tolerance. The gel strength of system was 25600 mPa. s and the gel viscosity loss rate was 18.99% after 120 min sheering at 200 S-l, 27℃. The stemming ratio of fxactured cores in average was 88.7%, and average enhanced oil recovery rate was 12.1%.