以玛北油田具有代表性的乌尔禾组和百口泉组为研究对象，针对埋藏深、致密、低孔、特低渗、非均质性的储层特征，通过对玛北油田压裂改造历史状况及存在问题的系统分析和深入研究，提出了以深穿透大中型压裂改造为核心、结合转向压裂改造技术的多裂缝压裂改造思路。通过对转向剂的评价及优选，完善压裂施工工艺，经现场压裂施工应用，压后产油量比压前取得了明显的提升。

Wuerhe oil well groups and Baikouquan oil well groups in Mabei Oilfield have characters of deep bury,compact,low porosity,super low permeability and strong heterogeneity.Through the systematic analysis and deeply research on the historical situation and existing problems of the fracturing treatments in Mabei Oilfield,a multi-crack fracturing method which combines the massive re-fracturing with steering fracturing technology is proposed.The fracture technology of this method is perfected by the evaluation and optimum selection of steering agent.Implementation results show that after using this method,the oil production of oil wells increases noticeably.