大庆油田气体钻井井斜控制技术研究

Deviation Control Technology of Gas Drilling in Daqing Oilfield

气体钻井以其保护油气层、提高钻速等方面的巨大优势而得到广泛应用,但是气体钻井井斜问题一直没有得到很好地解决,制约着气体钻井的发展。国内外对气体钻井井斜机理及控制方面研究较少,还没有形成系统的理论和技术。根据大庆油田气体钻井实例现从地质因素、井径扩大、钻井参数、井斜角、钻井循环介质等方面分析了气体钻井井斜的原因,基于分析结果并与大庆现场钻井实例相结合,初步给出了气体钻井井控措施,为气体钻井设计和施工提供一定的基础。

Gas drilling has been widely applied because of its enormous advantage in protecting gas field, improving drilling rate, etc. However, the issue of hole deviation has not been appropriately solved, it still restricts the development of gas drilling. At present the study on gas drilling in terms of borehole deviation mechanism and control method is very few and has not form a theory of large scale systems at home and aboard. According to some exam- pies of gas drilling in Daqing Oilfield, the reasons are analyze for deviation of gas drilling from many aspects such as geological factor, borehole diameter expanding, drilling parameter, hole drift angle, circulation medium of drilling, etc. Base on the analytic result and the site example of drilling, tentative diagnosis measures has been given to gas drilling control measures, this result laid a solid foundation for the design and construction of gas drilling.