低渗气藏压裂中裂缝导流能力的影响因素研究

Study of Influence on Fluid Diversion Ability of Crack When Fracture in Low Percolation Gas Reservoir

利用改进的API线性导流仪,对支撑剂充填层气体导流能力的主要影响因素进行了实验研究。研究表明,低渗气藏压裂改造过程中,除支撑剂种类、强度、闭合压力、铺置浓度等影响裂缝导流能力外,充填层的微粒及其含量、液体滞留是气体导流能力下降的主要因素。此外对现场使用的压裂交联液进行了充填层气体导流能力的损害评价,提出了防止和减少压裂液损害的有效方法和措施。

Using advanced API linear fluid diversion meter, experimental study of main factors influencing on gas diversion capacity packing by proppant. It is shows that besides proppant types, stress, closure pressure, additional concentration influences fluid diversion ability of crack for treatment to low percolation gas reservoir, grain of pack formation and its content, hold-up of fluid are the key reason to cause depress of it. Damage evaluation of the field applied fracturing crosslinked fluid to fluid diversion is conducted to suggest some effective methods and treatments for avoiding or decreasing these damages.