准噶尔盆地南缘山前高陡构造高密度水基钻井液技术研究

发布时间：2018-02-22 18:05

本文关键词： 准噶尔盆地南缘地区高陡构造 PRT-有机盐钻井液体系　出处：《长江大学学报(自科版)》2016年35期 　论文类型：期刊论文

【摘要】：准噶尔盆地南缘地区具有广阔的勘探前景,该地区钻井复杂事故多,导致钻井速度下降、钻井周期长。主要地质原因在于安集海河组地层岩性以泥岩为主,水敏性极强,易发生泥岩水化膨胀、分散而造成井眼缩径、井壁垮塌。为了提高南缘地区钻井速度,加快勘探开发进程,针对上述钻井难点,结合南缘地区地质资料及已完钻井的资料,对该地区钻井液技术进行了研究。根据安集海河组地层特点,室内对现场使用的PRT钻井液体系和有机盐钻井液体系进行了评价,优选出具有现有2种钻井液体系优点的高密度PRT-有机盐钻井液体系配方,并对该体系的抑制性、封堵性和抗污染性进行了评价。结果表明,该钻井液体系能很好地满足钻井工程的需要。将该新的钻井液体系在现场进行了应用,使用效果良好,其中A5井?311.1mm井段较邻井平均机械钻速提高22%,钻井周期缩短4d。
[Abstract]:The southern margin of Junggar Basin has a broad prospect of exploration. The complex accidents of drilling in this area lead to the decrease of drilling speed and the long drilling period. The main geological reason is that the formation lithology of Anji Haihe formation is dominated by mudstone, and the water sensitivity is very strong. In order to improve drilling speed and speed up the exploration and development process, in order to improve the drilling speed and speed up the exploration and development process, in view of the above drilling difficulties, combined with the geological data of the southern margin and the completed drilling data, The drilling fluid technology in this area is studied. According to the formation characteristics of the Anji Haihe formation, the PRT drilling fluid system and the organic salt drilling fluid system used in the field are evaluated indoors. The formula of high density PRT- organic salt drilling fluid system with the advantages of two existing drilling fluid systems was selected, and the inhibition, plugging and pollution resistance of the system were evaluated. The drilling fluid system can well meet the requirements of drilling engineering. The new drilling fluid system has been applied in the field, and the effect is good, in which well A5? The average drilling speed of 311.1mm well is increased by 22, and the drilling period is shortened by 4 days.
【作者单位】：中石油新疆油田分公司勘探公司;长江大学石油工程学院;
【分类号】：TE254

【相似文献】