充气欠平衡钻水平井井眼净化规律研究  

Research on Hole Cleaning in Horizontal Well with Aerated Underbalanced Drilling

作　　者：李小林[1] 李皋[1] 宋巍 崔广亮[3] 陈佳[1] 唐斌[1] 

机构地区：[1]油气藏地质及开发工程国家重点实验室,西南石油大学,成都610500 [2]冀东油田公司工程监督中心,唐山063200 [3]海洋石油工程股份有限公司,天津300452

出　　处：《科学技术与工程》2013年第24期7138-7142,共5页Science Technology and Engineering

基　　金：国家科技重大专项(2011ZX05021-003)资助

摘　　要：欠平衡钻井技术由于在提高勘探开发水平、降低钻井成本、避免储层损害等方面的优势,已被广泛应用。然而,采用充气欠平衡钻进的方式,使得水平井段的气液两相流型变化规律复杂化。通过分析水平井段岩屑颗粒受力情况,明确水平井段与直井段岩屑运移规律存在本质的区别,并建立岩屑运移数学模型。通过研究充气欠平衡钻水平井携岩问题,建立水平环空多相流流型判别模型及压降计算数学模型。最后编写计算程序,以实际钻井参数为例,验证模型,并为现场的优化钻井参数提供建议。Due to the advantages in improving the level of exploration, reducing the drilling cost and avoiding formation damage from liquid phase effectively, underbalanced drilling has been used widely. The law of gas-liquid two-phase flow pattern is complicated because of aerated drilling, the difference of cuttings migration mechanism between horizontal wells and vertical wells are definited and the mathematical model of cuttings migration through analyzing forces acting on cuttings in horizontal sections are built, the discrimination model of multiphase flow pat- terns and the model of calculating pressure drops of horizontal annulus are built, the program are written and the es- tablished models based on actual drilling data are confirm, and confirmed advice in optimization of drilling parame- ters is orovided.

关 键 词：充气欠平衡 水平井 岩屑运移 气液两相流 数学模型 

分 类 号：TE21[石油与天然气工程—油气井工程]