不同粒径组合支撑剂导流能力实验研究

在油气田开发过程中,深井、超深井通常具有高温、高压、高闭合压力等复杂情况。在此类油井中进行水力压裂作业时,由于上述特点而面临诸多问题。高闭合压力下,大粒径支撑剂由于颗粒间接触面积小,承压能力差,破碎率高,支撑裂缝的导流能力下降快;小粒径支撑剂由于粒径小,形成的流动孔隙小,不能提供足够的裂缝导流能力。综合考虑以上因素,开展不同粒径组合支撑剂短期和长期导流能力的实验研究。实验结果表明：高闭合压力下,不同粒径支撑剂按照适当比例组合后,其抗破碎能力和导流能力较单一粒径支撑剂有显著的改善。

Study on flow conductivity of proppant with different size combination

During the oil and gas field development, the deep and ultra-deep wells usually have many complex situations as high temperature, high pressure and high closure stress. Hydraulic fracturing operations in such wells are often faced with many questions. For example, at the high closure stress, the flow conductivity of large diameter proppant drops very quickly because of the low compressive resistance ability and high crushing rate caused by small contacted area. On the other hand, the small size proppant can...