吉林大学学报(地球科学版) ›› 2020, Vol. 50 ›› Issue (2): 589-597.doi: 10.13278/j.cnki.jjuese.20200021
谢春来, 王照阳, 仇越, 勾广洲, 高军飞, 尹光, 吴勇
Xie Chunlai, Wang Zhaoyang, Qiu Yue, Gou Guangzhou, Gao Junfei, Yin Guang, Wu Yong
摘要: 盐膏层钻井是当前钻井技术的难题之一,钻井施工中存在盐膏层及软泥岩层安全钻进难度大、井身质量控制困难和卡钻几率较大等问题。本文针对伊拉克哈法亚油田的地层条件:改变了盐膏层段套管坐封点,使套管漏封漏失状况得到有效控制;将定向轨迹井斜角由71.29°优化为29.48°,避开了易形成岩屑床井段,有效控制定向段卡钻,提高施工效率23%;确定哈法亚油田软泥岩缩径周期为48 h左右。根据缩径规律开展钻井,有效减少了钻头泥包和泥环的形成。确定了依据石膏岩、盐岩含量变化控制饱和盐水钻井液密度的原则,形成了控制饱和盐水钻井液黏度的现场维护技术措施。
中图分类号:
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