扎纳若尔油田巨厚盐层的钻井泥浆工艺

论述了盐对泥浆胶体性质的影响机理,介绍了两性离子聚合物抗盐泥浆的组成,总结了两性离子聚合物泥浆体系钻穿大段盐层的施工工艺及现场应用中常见的问题,指出抗盐泥浆的基础是保证处理剂对粘土颗粒足够的护胶能力,而手段是提高抗盐处理剂在泥浆中的含量。通过扎纳若尔油田的钻井实践,证明了两性离子聚合物泥浆极强的抗盐能力和钻穿盐层泥浆工艺的合理性。

DRILLING FLUIDS TECHNOLOGY OF MEGASALT BED IN ZALALOER OILFIELD

The mechanism that salt affect colloid characteristic of the mud has been discussed. The components of amphoteric polymer salt tolerance mud have been introduced, and the field operation technology drilling through thick salt bed by using amphoteric polymer mud system has been summarized. The key of the salt tolerance drilling fluids is to maintain dispersity of thebentonite particles by increasing the content of salt tolerance additives in mud. Results of applying the amphoteric polymer salt tolerance mud in Zalaloer oilfield show that the drilling fluid system has a pretty good ability to withstand salt, and the drilling fluid technology is reasonable in drilling thick salt bed.