欠平衡钻井直井段岩屑运移规律研究  

Study on Cuttings Transport in Vertical Well with UBD

作　　者：靳鹏菠 黄欣 宋巍[2] 

机构地区：[1]冀东油田分公司勘探开发建设项目部,唐海063200 [2]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

出　　处：《科学技术与工程》2012年第34期9154-9157,共4页Science Technology and Engineering

摘　　要：欠平衡钻井技术由于具有提高钻速、及时发现和保护储层等优点,已被广泛应用。然而,地层气体进入井筒后,气液两相流型变化规律复杂。由于不同气液流型具有不同的携岩效果,因此井筒岩屑运移规律多变。首先分析单个岩屑的受力情况,建立岩屑运移数学模型。然后建立环空多相流流型判别模型及环空压力计算数学模型。最后以某井为例编制计算程序,分析相应的钻井参数及进行钻井参数优化。数值模拟结果与现场施工参数吻合。Underbanlanced drilling （UBD） technology is widely used in practice because it has many advanta- ges such as improving drilling speed and discovering and protecting reservoir timeliness. However, after the forma- tion gas enters into wellbore annulus, the rule of gas-liquid two-phase flow is complicate, because different gas-liq- uid flow pattern has different throughput capacity, as a result, the rule of cuttings transport is varied. Firstly, the essay introduces cuttings transport mathematical model; Secondly, it introduces the model of distinguishing different multiple phase flow patterns and the mathematical model of calculating annulus pressure; Finally, it takes some well for example and formulates calculator program, analyzes The results coincide with field parameters.

关 键 词：欠平衡钻井 气液两相流 数学模型 岩屑运移 计算程序 

分 类 号：TE242[石油与天然气工程—油气井工程]