延长气田压裂液体系室内评价研究

延长气田位于鄂尔多斯盆地中部,经勘探在上古生界砂岩地层发现了四套储层,通过评价均属于低渗透气藏,主要表现为储层物性差,平均渗透率(0.2~1.0)×10-3μm2、孔隙度(4.8%~7.5%),地层压力系数低,平均为0.852,基本无自然产能。因此,加砂压裂技术是气田勘探开发的关键技术之一。文章对现用羟丙基胍尔胶压裂液体系的添加剂性能及压裂液整体性能进行了评价,该体系能够达到行业标准的要求。

Study on the laboratory evaluation of Yanchang gas field fracturing fluid system

Yanchang gas field is located in the central basin of the Erdos, exploration in the upper Paleozoic sandstone formation discovered four sets of reservoir,through the evaluation belongs to low permeability gas reservoir,the main performance for the reservoir physical property is poor,average permeability（0.2-1.0）×10^-3μm^2,porosity（4.8 %-7.5 %）,low formation pressure coefficient on average 0.852,have no natural productivity.Therefore,the sand fracturing technology is one of the key techniques in exploration and development of gas field.The article on the current performance and fracturing fluid additive for overall performance of hydroxypropyl guar gum fracturing fluid system was evaluated, the system can achieve the requirements of industry standards.