低渗透油藏重复压裂机理研究及现场应用

对重复压裂造缝机理的研究表明，重复压裂井由于初次压裂裂缝以及油层生产活动引起的压力下降，导致近井地带的应力场发生变化，从而在重复压裂过程中引起裂缝的重新定向。结合华北油田桐西断块储层低渗透的特点，进妒了重复压裂参数的优化和压裂材料的选择，提出了选井选层的原则。重复压裂技术在桐47-43x井成功实施，取得了很好的增油效果，为桐西断块储层下一步的开发提供了重要的技术措施。

Study on Multiple Fracturing Mechanism in Low Permeability Pool and Its Field Application

Studying on producing gaps mechanism of multiple fracturing shows that pressure drawdown causing by first fracturing fracture and oil reservoir production in multiple fracturing well results stress field changing near well, and fracture reorientation in the course of multiple fracturing. Combining with low permeability characteristic in Tongxi fault block reservoir in Huabei oilfield, multiple fracturing parameters is optimized and fracture materials are chosen, principle about choosing wells and layers is ...