摘要
低渗致密气藏通常具有低孔、低渗、异常地层压力、强水锁等地质特征和最大的储层损害潜力。致密砂岩气藏自然产能普遍较低,通常需要实施水力压裂等增产措施才能经济有效地进行开发。在充分认识储层地质特征的基础上,针对四川盆地三叠系须家河组致密砂岩气藏,就1号和2号两种压裂液对储层的损害情况进行了评价,并对2号压裂液进行了大量的室内实验。通过对其配方甲醇加量的优化,优选出适合上三叠统须家河组储层的压裂液配方。
Tight gas reservoirs are characterized by low porosity and permeability, abnormal formation pressure, strong water lock and largest potential from reservoir damage. Hydraulic fracturing should be needed for these reservoirs in order to have an economic and effective development because the natural productivity is always lower. Considering fully reservoirs' geological characteristics and taking tight sand gas reservoirs of Xujiahe Formation in Sichuan Basin as aims, this paper evaluates the damage of No. 1 and No.2 fracturing fluids to reservoirs. Meanwhile, a lot of lab experiments with No. 2 fracturing fluid were carried out. Finally, methanol dose in the formula of No. 2 fracturing fluid was optimized, which is very suit for Triassic Xujiahe Formation.
出处
《天然气技术》
2008年第2期23-25,54,共4页
NATURAL GAS TECHNOLOGY
关键词
致密气藏
压裂液
储层损害
实验
评价
Tight gas reservoirs Fracturing fluid Experiment Reservoir damage Evaluation
