新型缝网压裂技术在镇北致密储层的研究与应用

北美非常规油气藏的成功开发为长庆致密油藏改造开辟了新的技术途径。在与北美巴肯致密油藏特征进行对比分析的基础上,指出镇北长X致密储层具有天然裂缝发育、岩石脆性程度高、水平两向应力差适中的特点,具备大规模体积压裂形成复杂网状裂缝的条件。因此,以体积压裂为理念,在该区块开展了的"高排量、大液量、低黏压裂液、小粒径支撑剂"技术模式的新型缝网压裂先导性试验,取得了较好的增产效果,为长庆油田0.3mD以下致密油藏压裂改造积累了重要的经验。

Research and application of the New Network Fracturing Technology in Zhenbei Tight Reservoir

Unconventional reservoirs developed in North America opens a new technical way to changqing tight reservoir reformation. On the basis of comparison and analysis with North America Bakken tight oil reservoir, Zhenbei Chang X tight reservoir has the characteristics of more natural fractures , high rock brittleness degree and the moderate stress difference, can form complicated netwok fracture through volume fracturing technology. So, for the idea of volume fracturing, carried out the new network fracture pilot test with the technology mode of "high discharge rate, large liquid volume, low viscosity fracturing fluid, small diameter proppant " . Changqing oil field accumulated important experience for the test obtained good production effect.