海水基稠化剂的筛选与性能研究

Screening and Performance Evaluation of Sea-water Based Thickening Agent

随着海上油气田的开发,深海压裂和大规模压裂技术成为海上油气开采的发展方向。受海上平台空间和物料运输的限制,研究海水配制的稠化剂为海上压裂技术的发展开辟了新的途径。通过对目前常用的4种类型稠化剂(植物胍胶、微聚物、黏弹性表面活性剂VES、超支化分子)在溶解和配方残渣质量浓度等方面的试验研究和对比,从分子结构角度和作用机理分析了各自的溶解性能和耐盐性能。在矿化度大于30000mg/L海水中,超支化分子类稠化剂的溶解时间为4min,残渣质量浓度为66mg/L,性能最佳,可作为海水配制压裂液的目标稠化剂。

With the development of offshore oil and gas fields,deep fracturing and large-scale fracturing technologies became the development direction of offshore oil and gas exploration.Limited by space of offshore platform and material transportation,sea-water preparation of thickener opened a new route for the development of offshore fracturing.The salt resistance mechanism of four types of thickeners(guar gum,polymer,VES and hyperbranched polymer molecule)was studied in its molecular structure and functioning mechanism through experimental research and contrast in solution and residue content in formula.It is found out that its salinity in sea water is more than 30000mg/L,the dissolution time is less than 5min,the residue content is 66mg/L,it can be used as the target thickener for sea water prepared fracturing fluid.