阿姆河右岸东部山前中上部不稳定地层钻井液技术优化及应用
Optimization and Application of Drilling Fluid Technology for Unstable Upper Piedmont Formation in the East of Amhe River Right Bank

针对阿姆河右岸东部白垩系地层钻井过程中存在的强水敏泥岩段造浆、缩径和泥包，以及高地应力破碎性地层和薄弱交界面井壁失稳，起下钻阻卡严重、化眼频繁等复杂问题，基于白垩系地层井壁失稳机理及技术难点分析，提出了钻井液技术优化对策，在勘探前期应用的两性的离子聚合物体系基础上，通过引入氯化钾和聚胺抑制剂、封堵防塌剂为核心的处理剂，进一步强化钻井液体系抑制性和封堵防塌性能，优化形成了一套适合于该地层的钾胺基两性离子聚合物钻井液体系，并在现场进行了应用。室内研究和现场应用表明，该钻井液体系具有较强的抑制性能、封堵防塌性能。应用过程中钻井液性能稳定，录井岩屑清晰，无钻头和扶正器泥包问题，降低阻卡化眼时效，缩短了钻井工期，为该区块上部地层段安全、快速、高效钻井提供了技术保障。
According to the complex geological conditions of cretaceous formation in Turkmenistan with the drilling problems of being prone to hydrate, strong water sensitivity, wall sloughing, hole enlarging and bit balling, as well as caving and sticking during drilling operations and trips, based on the analysis and summary of the previous experience and fluid technical difficulties, the drilling fluid optimization Technique technical measures are put forward. Through the study on inhibition of polyamine inhibition, potassium chloride and anti-sloughing plugging agent and working with new efficient independent developed drilling sealing materials, a set of potassium amine amphoteric polymer drilling fluid technology was developed, which is suitable for the complex geological con-ditions of cretaceous formation in Turkmenistan. The laboratory studies and field application show that this drilling fluid system has ability of strong sealing and anti-collapse, hole cleaning and sticking prevention. No bit balling and centralizer balling problems occur during drilling, which completely satisfies the requirements of drilling in the complex geological conditions of cretaceous formation in Turkmenistan and provides the technical support for safe.