羧甲基香豆胶压裂液在乾安油田的研究与应用

Research of Carboxymethyl Fenugreek Gum Fracturing Fluid and its Application in Qian'an Oilfield

针对乾安油田储层特点,室内进行了羧甲基香豆胶压裂液高温性能评价。实验结果表明,羧甲基香豆胶压裂液具有耐高温耐剪切、良好的携砂性能和防膨效果、低表面张力和界面张力的特点。该压裂液在乾安油田油井压裂现场应用,压裂施工取得成功,压后获得较好的增产效果。

In view of the low porosity, low permeability, strong water sensitivity of the reservoir in Jilin Oilfield, a low damage perforating fluid formulation was developed through optimization in laboratory experiments and was evaluated. The formulation of this perforating fluid is： 2% sulfonated phenolic resin （SMP-II） ＋ 1% carboxymethyl cellulose （HEC） ＋ 3% KC1 ＋ 2% Na2SO3 ＋ 1% uhrafine calcium carbonate powder （JQYZ） ＋ 0.05% surfactant （FC-3B） ＋ 4% corrosion inhibitor （JCI） ＋ heavyweight additive （ZnBr2 ）. According to the results of evaluation, this perforating fluid has the characteristics of high density, low corrosivity, strong inhibition, low surface tension and low damage, etc. , and it can withstand the temperature that is as high as 155 ℃. Therefore, this perforating fluid can satisfy the construction operation at Jilin Oilfield.