柳林地区煤层压裂液伤害评价及应用

发布时间：2018-07-28 20:35

【摘要】：压裂增产技术是煤层气开发的重要手段之一。针对鄂尔多斯盆地柳林地区煤层具有储层压力低、渗透率低、孔隙度低和含气饱和度低以及煤层吸附性较强等特点,通过使用短岩心(暂堵)酸化流动仪进行了活性水压裂液、线性胶压裂液、冻胶压裂液和清洁压裂液对煤岩的柳林地区煤岩心渗透率伤害评价实验。实验结果表明,活性水对岩心渗透率的伤害程度最低,为9.82%,清洁压裂液的伤害程度为43.49%,冻胶破胶液压裂液的伤害程度为81%,线性胶压裂液的伤害程度为89.3%,对煤层伤害程度依次为:活性水清洁压裂液冻胶破胶液线性胶。使用优选出的活性水压裂液对现场实施压裂10口井,单井的最大砂比不超过30%,平均砂比15%左右,显示出活性水压裂液的携砂能力满足压裂施工要求,施工成功率接近100%。
[Abstract]:Fracturing is one of the most important methods in coalbed methane development. In view of the characteristics of low reservoir pressure, low permeability, low porosity and low gas saturation, and strong absorption of coal seam in Liulin area, Ordos Basin, active water fracturing fluid is carried out by using short core (temporary plugging) acidizing flow meter. Experiments on damage evaluation of permeability of coal core in Liulin area of coal rock by linear gel fracturing fluid, gel fracturing fluid and clean fracturing fluid. The experimental results show that the damage degree of active water to core permeability is the lowest. For 9.82, the damage degree of clean fracturing fluid is 43.49, the damage degree of gel fracturing fluid is 81, the damage degree of linear gel fracturing fluid is 89.3.The damage degree to coal seam is as follows: active water clean fracturing fluid gel fracture fluid linear glue. The best selected active water fracturing fluid is used for fracturing 10 wells in the field. The maximum sand ratio of single well is less than 30 and the average sand ratio is about 15%. It shows that the sand carrying capacity of active water fracturing fluid can meet the requirements of fracturing operation, and the success rate of operation is close to 100.
【作者单位】：中国石油大庆油田第七采油厂;
【分类号】：TE357.12

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