安棚深层系致密砂岩水平井钻井技术研究与应用

RESEARCH AND APPLICATION ON THE HORIZONTAL DRILLING TECHNOLOGY IN ANPENG DEEP TIGHT SANDSTONE FORMATION

泌阳凹陷安棚深层系致密砂岩气藏储量丰富,河南油田为开辟新的增储领域,先后在安棚区块核三段Ⅸ油组14小层、核三段Ⅷ油组2小层完成了安HF1井、安深3-1HF井两口致密砂岩水平井。在分析该区地质特征的基础上,针对长水平段水平井存在的井眼轨迹控制困难、摩阻扭矩大、岩屑床不易清除及技术套管封固段长等工程技术难点,通过研究攻关及钻井实践,形成了河南油田致密砂岩水平井钻井技术系列,为致密砂岩油(气)勘探开发提供了技术支持。

As Anpeng deep information has abundant reserves of tight sandstone reservoirs in Miyang Depression, Henan oilfield has completed An HF-1,Ansheng HF-1 two tight sandstone horizontal wells in Eh_3 Layer Ⅸ oil group 14 thin layer and Ⅷ oil group 2 thin layer in order to open up new increasing reservoir. On the basis of geological characteristics and for the engineering difficulties such as hole trajectory control difficulties,large torque and drag,hard to removing cuttings bed and long isolation section of intermediate casing,Henan oilfield has formed the series of drilling technology about tight sandstone horizontal well by research and drilling practices,which provided the technical supporting for tight sandstone oil( gas) exploration and development.