超分子压裂液体系的研制及评价

蒋其辉; 蒋官澄; 刘冲; 王春蕾; 祝琦

doi:10.3969/j.issn.1001-5620.2015.05.018

超分子压裂液体系的研制及评价

doi: 10.3969/j.issn.1001-5620.2015.05.018

1.
中国石油大学(北京)石油工程学院, 北京
2. 油气资源与探测国家重点实验室, 北京
3. 渤海钻探工程公司, 天津

基金项目: 国家"863"主题项目"致密砂岩气高效钻井与压裂改造关键技术"(2013AA064800)部分研究成果。

详细信息

作者简介:
蒋其辉,博士, 1986年生,主要从事油气藏增产改造理论与技术应用领域研究。地址:北京市昌平区府学路18号中国石油大学汇才公寓1026号;邮政编码102249;电话15210816233, E-mail:jiangxiaye@163.com。

中图分类号: TE357.12
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出版历程
- 收稿日期: 2015-04-20
- 刊出日期: 2015-09-30

Development and Evaluation of Supramolecular Fracturing Fluid

Room 520, North Star Times Tower, Chaoyang District, Beijing 100101, China

摘要

摘要: 为解决现有交联压裂液抗剪切稀释性差、仅靠高黏度携砂,且残渣含量高易造成储层损害等问题,利用超分子聚合物化学原理,设计和制备出了一种超分子聚合物稠化剂,并研制出了配方简单、无需交联的超分子聚合物压裂液,并对其流变性、静态悬砂性、破胶性、静态滤失性和岩心基质伤害率进行了评价。结果表明,该压裂液体系在130℃、170 s^-1剪切2 h后黏度可保持在140 mPa·s;支撑剂的24 h和48 h沉降速率分别为3.7×10^-4 mm/s和5.6×10^-4mm/s;在80℃时加入0.05%的破胶剂过硫酸钾, 2 h破胶后,破胶液黏度为1.32 mPa·s,破胶液表面张力为25.23 mN/m,破胶液透明、基本无残渣;初滤失量为2.32×10^-3 m³/m²,滤失系数为1.86×10^-4 m³/min^0.5,滤失速率为3.23×10^-5 m/min,压裂液滤液对岩心基质的伤害率为10.8%。室内评价结果证明,该超分子聚合物压裂液体系满足致密气藏使用要求。
- 超分子聚合物 /
- 压裂液 /
- 致密气藏
Abstract: Crosslinking polymer fracturing fluids presently used have poor shear-thinning performance, therefore relying on high viscosity forsand carrying. Moreover, these fracturing fluids, because of their high residue contents, have been causing reservoir damage. A supramolecular polymer has recently been developed and a fracturing fluid of simple formulation has been prepared. Laboratory studies show that this fracturing fluid has viscosity of 140 mPa·s after shearing at 130℃ and 170 s^-1 for 2 h. Settling velocities of a proppant in this fracturing fluid at 24 h and 48 h are 3.7×10^-4 mm/s and 5.6×10^-4 mm/s, respectively. At 80℃, this fracturing fluid, 2 h after treatment with potassium persulfate at a concentration of 0.05%, has a viscosity of 1.32 mPa·s and a surface tension of 25.23 mN/m. The fracturing fluid, with gel broken, is transparent, and has almost no residues. It has an initial filtration volume of 2.32×10^-3 m³/m², a filtration coefficient of 1.86×10^-4 m³/min^0.5, and a filtration rate of 3.23×10^-5 m/min. Damage of the filtrate of the fracturing fluid to the matrix of cores is 10.8%. These properties make this fracturing fluid suitable for use in the fracturing of tight gas reservoirs.
- Supramolecular polymer /
- Fracturing fluid /
- Tight gas reservoir

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