摘要
苏里格气田是一个低压、低渗、低丰度、产层薄且分布面积大的岩性气藏,采用水平井开发技术是开发这种类型气田的有效方法。近年来随着苏里格气田大开发的深入,水平井钻井数量也在逐年增多。该气田在水平井施工中,造斜增斜井段主要集中在石千峰组和石盒子组(简称"双石组"),然而地层存在大段泥岩,脆性强,极易发生井壁坍塌掉块现象。通过对"双石组"地层井壁失稳机理分析,进行井壁稳定性研究,进而提出了井眼轨迹优化、钻井液体系优选及性能优化、钻头优选、现场施工等方面的应对措施。
Sulige Gas Field is a lithologic gas field with low pressure,low permeability,low abundance,horizontal well technology is an effective method to develop this type of gas field.In recent years,along with development of Sulige Gas Field,the number of horizontal well drilling increases year by year.In the horizontal well construction,deflecting section is mainly concentrated in the Shiqianfeng Formation and Xiashihezi Formation ( abbreviation for Shuangshi Formation ), however there is shale formation,brittle,vulnerable which is be easy to be collapsed.Through the mechanism of instability analysis for Shuangshi Formation of borehole,borehole stability,it puts forward the measures for well trajectory optimization,the optimized drilling fluid system optimization,bit selection,field construction.
出处
《长江大学学报（自科版）（中旬）》
CAS
2013年第5期50-53,6,共4页
Journal of Yangtze University(Nature Science Edition)
关键词
苏里格气田
造斜增斜段
泥岩
井壁稳定控制
Sulige Gas Field
kick off section and build section
clay stone
Control wellbore wall stability
