钻井液与完井液2017，Vol.34Issue(2)：70-74,5.DOI:10.3969/j.issn.1001-5620.2017.02.012
伊拉克米桑Fauqi油田水平井造斜段钻井液技术
Drilling Fluid Technology for Angle Build Section of Horizontal Wells in Iraq Missan Fauqi Oilfield
陈建新 1赵振书 1李广环 1侯士立 1董殿彬 1王孝琴 1王倩1
作者信息
- 1. 中国石油集团渤海钻探泥浆技术服务分公司,天津 300280
- 折叠
摘要
Abstract
In horizontal drilling in the Fauqi oilfield, the angle build and hold sections are generally at depths between 3350 – 4480 m, the Cretaceous system, which mainly composed of limestone, mudstone and shale. Long time of hydrocarbon development has resulted in low formation pressure. During drilling, borehole collapse, differential pressure pipe sticking and lost circulation have been encountered frequently. Based on the formation characteristics, a BZ-KSM drilling fluid was used in drilling the well FQCS**. To improve the rheology of the drilling fluid and to prevent the formation of cuttings beds, an additive BZ-YRH was introduced into BZ-KSM. BZ-YFT, a nano plugging agent and a silicate were used to improve the inhibitive capacity of the drilling fluid. To avoid lost circulation, mud density was maintained between 1.22 g/cm3 and 1.28 g/cm3 in the 5th interval. Prior to POOH to change to directional drilling tool, the mud density was increased to 1.35 g/cm3. Field application has shown that this drilling fluid had good inhibitive and plugging capacity, as well as superior filtration control performance and rheology. Downhole problems such as shale dispersion, borehole instability and difficulties in cuttings carrying have been greatly mitigated, ensuring the success of the drilling operation.关键词
水平井/KCl-聚合物钻井液/井壁稳定/抑制性/润滑性/造斜段/伊拉克米桑油田Key words
Horizontal well/KCl-polymer drilling fluid/Borehole stabilization/Inhibitive capacity/Lubricity/Building up section/Missan oilfield in Iraq分类
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陈建新,赵振书,李广环,侯士立,董殿彬,王孝琴,王倩..伊拉克米桑Fauqi油田水平井造斜段钻井液技术[J].钻井液与完井液,2017,34(2):70-74,5.
