神府致密气区块小井眼井改进研究  

Improvement of Slim Holes in Shenfu Tight Gas Block

作　　者：贾佳 谢海涛 夏忠跃 解健程 Jia Jia;Xie Haitao;Xia Zhongyue;Xie Jiancheng(Engineering Technology Branch,CNOOC Energy Technology&Services Limited(Tianjin 300467,China))

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300467

出　　处：《石油工业技术监督》2021年第4期6-10,共5页Technology Supervision in Petroleum Industry

基　　金：中海油能源发展股份有限公司工程技术分公司科技项目“临兴区块致密砂岩气水平井钻效技术研究”(编号:GCJSXMHT-1716)。

摘　　要：小井眼井身结构的显著优势,在神府区块致密气开发中得到了推广应用。但是,在钻井过程中,存在机械钻速慢、工期长、固井漏失、易泥包等问题。为了解决这些问题,从井身结构、钻头、钻具组合等方面进行了改进研究,将井身结构优化为Ф241.5 mm×Ф193.7 mm+Ф165.1 mm×Ф114.3 mm,将钻头由19 mm齿调整为16 mm齿,将Ф88.9 mm钻具优化为Ф101.6 mm钻具。现场作业表明,可以提高机械钻速31%,缩短工期23%,有效避免了固井漏失、钻头泥包等,达到高效钻井的目的,对后续致密气小井眼钻井具有一定的借鉴意义。Due to the significant advantages of slim hole structure,it has been widely used in Shenfu tight gas block.However,in the process of drilling,there are some problems,such as slow ROP,long construction period,cementing leakage,easy to produce bit balling and so on.In order to solve these problems,the wellbore structure,bit and BHA were improved.The wellbore structure was optimized to beФ241.5 mm×Ф193.7 mm+Ф165.1 mm×Ф114.3 mm,the bit was adjusted from 19 mm teeth to 16 mm teeth,and theФ88.9 mm drilling tool was optimized to beФ101.6 mm drilling tool.The field operation shows that the improvements can increase the ROP by 31%,shorten the construction period by 23%,effectively avoid the problems of cementing leakage and bit balling,and achieve the purpose of efficient drilling,which has certain reference significance for subsequent slim hole drilling in tight gas reservoirs.

关 键 词：神府区块 致密气 小井眼 井身结构 

分 类 号：TE246[石油与天然气工程—油气井工程]