中原油田封堵大孔道技术研究

Plugging macropores in Zhongyuan Oilfield

针对中原油田注水开发的不断深入，大孔道普遍存在，递减逐年加大，开发效果变差。通过分析中原油田地质特点，开展封堵大孔道技术研究，形成了配套的ＰＩ决策技术、示踪剂油藏监测技术、多段塞封堵技术、分层封堵及施工工艺技术，并对各种技术进行了详细的阐述。同时开展了系列封堵大孔道堵剂研究，开发了石灰泥堵剂、水泥复合堵剂、粉煤灰堵剂、纸浆废液堵剂、Ｆ９１７ 树脂堵剂、ＷＴ－ＩＩ封堵剂、盐酸—硅酸钠等调剖剂的研究。试验证明，系列堵剂对封堵大孔道具有明显的作用。现场应用取得了较好的结果，为高含水期油田稳产探索了一条新路，提高了油田最终采收率。

With development of waterflood decelopment in Zhongyuan Oilfield,macropores are widely existed,production decrease is accelerated annually.Through analysis of geologic features of Zhongyuan Oilfield,macropore plugging technique is studied,and matching techniques are formed,such as PI decision technique,tagged-agent reservoir monitoring technique,multi-slug plugging technique,separate-layer pluiging technique and operation technology. In this paper,each technique is expounded in detail. Meanwhile,plugging agents of macropore plugging are studied, And lime slurry plugging agent,cement compound plugging agent,fly ash plugging agent,pulp exhausts plugging agent,F917 resin plugging agent,WT-Ⅱ plugging agent and hydrochloric acid-sodium silicate profile control agent are developed.These plugging agents have apparent effects on plugging macropores and have got good results after application in field.