摘要
塔河油田超深定向井钻井主要使用聚磺混油钻井液,该钻井液虽然能满足超深定向井的钻井要求,但无法满足环境保护和油气层保护的要求。因此,以阳离子乳液聚合物钻井液为基础,通过引入磺化材料提高其抗温性,加入KCl提高其抑制性,优选出了KCl-阳离子乳液聚磺钻井液。室内性能评价表明,KCl-阳离子乳液聚磺钻井液的高温润滑性、抑制性、稳定性与聚磺混油钻井液相当。现场应用表明,KCl-阳离子乳液聚磺钻井液能够满足塔河油田超深定向井的携岩、防塌、润滑和环保要求,可以替代聚磺混油钻井液,同样也适用于与塔河油田地质特征相似的超深定向井。
Polymer-sulfonate oil-mixed drilling fluid was used in ultra-deep directional wells m Tahe Oilfield. Although this drilling fluid can meet the requirement of ultra-deep directional drilling,it is unable to satisfy the requirements of environment and reservoir protection. Therefore, on the basis of cationic emulsion polymer drilling fluid,KClcationic emulsion polymersulfonate drilling fluid was selected by introducing sulfonated material to improve the temperature resistance, adding KC1 to improve its inhibitory properties. Laboratory performance evaluation showed that KCI cationic emulsion polymersulfonate drill- ing fluid was similar with polymer-sulfonate oil-mixed drilling fluid in high temperature lubricity,inhibition and stability. Practical application showed KCIcationic emulsion polymer-sulfonate drilling fluid could sat- isfy the requirements of cutting carrying, anti-sloughing, lubrication, and environmental protection of ultra- deep directional wells in Tahe Oilfield, replaced polymer-sulfonate oil-mixed drilling fluid, and was suitable for ultra-deep directional wells in similar geological conditions with Tahe Oilfield.
出处
《石油钻探技术》
CAS
北大核心
2012年第3期73-77,共5页
Petroleum Drilling Techniques
关键词
超深井
定向井
乳化钻井液
聚合物钻井液
钻井液性能
塔河油田
ultra-deep well,directional well,emulsion drilling fluid
polymer drilling fluid^drilling fluidproperty
Tahe Oilfield
