缝网压裂技术及其现场应用

针对低渗透、特低渗透储层的缝网压裂技术，完善了缝网压裂的概念，指出缝网压裂是在达到预期目标支撑缝长的主裂缝基础上，形成多缝直至形成“缝网”系统。对不同类型的储层，根据弹性力学假设，采用不同的平面模型，分析了形成缝网的力学条件。当施工时裂缝内净压力超过水平主应力差值与岩石抗张强度之和后，可在原始裂缝的基础上形成新裂缝，实现缝网。研究了各种缝网压裂施工方式，提出了目前可应用的缝网压裂施工方法，并指出缝网压裂的发展方向。采用缝网压裂设计理论对F1-15井进行了缝网压裂设计，施工取得成功。试验结果表明，压裂后效果显著，分析显示有多缝形成。

Network fracturing techniques and its application in the field

In terms of network fracturing techniques for low or ultra-low permeability reservoirs,the present paper supplemented the concept of network hydraulic fracturing by delineating network fracturing that forms multi-fractures even a fracture network system on the basis of forming principle fractures with the predicted supporting fracture length.Different planar models for various reservoirs and elastic hypotheses were used to analyze mechanical conditions for the formation of a fracture network.In practice,new...