A Study on Gel Fracturing Fluid for Coalbed Methane at Low Temperatures
A Study on Gel Fracturing Fluid for Coalbed Methane at Low Temperatures
复制标题
DOI：
10.1080/15567036.2010.545806
复制
发表时间：
2012-01-01
影响因子：
2.9
通讯作者：
Zhao, F.
中科院分区：
文献类型：
--
作者：
Dai, C.;You, Q.;Zhao, F.
活性水压裂液和植物胶压裂液在我国煤层气压裂中得到广泛应用，但存在流变性差、水不溶物含量高、残渣含量高等缺陷。针对煤层气储层低温（20-40 ℃）、低渗透的特点，研究了能够解决上述问题的冻胶压裂液。该冻胶压裂液由非离子聚丙烯酰胺、交联剂（ZrOCl 2）、pH调节剂、含（NH 4）（2）S2 O 8的破胶剂、活化剂等组成，并对冻胶压裂液的配方进行了优化和性能评价。实验结果表明，该冻胶压裂液具有配制简单、成本低、抗剪切能力强、滤失系数低、破胶速度快、破胶后无残留、易返排等优点。该冻胶压裂液的性能上级活性水和植物胶，非常适合作为煤层气低温压裂液。
Active water and plant gum fracturing fluids are widely used for coalbed methane in China, however, the limitations of poor theological property, high content of water insoluble substances, and high residual content need to be resolved. Considering the low temperature (20-40 degrees C) and low permeability of the coalbed methane reservoir, gel fracturing fluid, which can solve the problems above, was studied in this article. The gel fracturing fluid is composed of nonionic polyacrylamide, cross-linker (ZrOCl2), pH modifier, gel breaker containing (NH4)(2)S2O8, and activator The optimized formula and performance evaluation of gel fracturing fluid were also investigated. The experimental results show that this gel fracturing fluid has the advantages of easy preparation, low cost, strong shearing resistance capacity, low filtration coefficient, rapid break, lack of residual after gel breaking, and ease of flow back. The performance of the gel fracturing fluid is superior to that of active water and vegetable gum, and it is very suitable for use as a fracturing treatment in coalbed methane at low temperatures.