钻井液与完井液2017，Vol.34Issue(3)：44-48,5.DOI:10.3969/j.issn.1001-5620.2017.03.008
B国Syl气田Sy125井钻井液技术
Drilling Fluid Technology for Use in Drilling Well Sy125 in Syl Gas Field in Country B
刘海鹏 1王本利 1赵黎明 1李希君 1洪航海 1王伟 1吴万华2
作者信息
- 1. 中国石化集团胜利石油工程有限公司钻井工程技术公司,山东东营257064
- 2. 华北油田公司技术监督检验处,河北任丘062552
- 折叠
摘要
Abstract
The Syl gas field located in Country B has complex geological structures.21 wells were drilled in this gas field,nine of which have encountered pipe sticking during drilling,7 abandoned.During drilling of the 21 wells,23 times of various drilling troubles took place.To better develop the Syl gas field,a cooperation agreement was reached between the National Gas Field Company Ltd.of the country B and Sinopec,which proposed 4 wells in this gas field.The Well Syl-25 was the first well to be drilled,with designed depth of 3,200 m,and actual drilled depth of 3,560 m.Different drilling fluid formulation were selected for use in different intervals.To avoid the flow of drilling fluid over the shale shakers in siltstone drilling,the bentonite content of the drilling fluid was reasonably increased and the inhibitive capacity improved.Good mud rheology,which was maintained to clean the hole,accompanied by reaming operation,overcame the problem of"sudden slim hole" along the sandstone section in the Block Syl.In drilling the fourth interval,amine based poly alcohol drilling fluid was used to stabilize the borehole wall.The Well Syl-25 was finally deepened to 3,560 m with the consent from drilling and geology engineers.Drilling of the hole section from 3,200-3,560 m,which had never been performed in the past in the country B,not only helped the engineers obtain lithological data of this section,it also found 7 extra pay zones with high production rates.Completion tests of the well gave birth to 640,000 m3/day industrial gas flow.关键词
粉砂岩/页岩垮塌/胺基聚醇-KCl钻井液体系/砂岩瞬间小井眼/Sy125井Key words
Siltstone/Borehole collapse in shale formation/Amine based poly alcohol drilling fluid/Sudden slim hole in sandstone/Well Syl-25分类
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刘海鹏,王本利,赵黎明,李希君,洪航海,王伟,吴万华..B国Syl气田Sy125井钻井液技术[J].钻井液与完井液,2017,34(3):44-48,5.
