盐膏层合理钻井液密度的确定  

Determining Reasonable Density of Drilling Fluid in Evaporite Beds

作　　者：朱亮[1] 楼一珊[1] 黄万龙[1] 刘瀚宇 梁昌健[3] 李呈祥[4] 

机构地区：[1]油气钻采工程湖北省重点实验室长江大学石油工程学院,湖北荆州434023 [2]渤海钻探大港油气合作开发公司,天津300280 [3]塔里木油田分公司开发事业部轮南作业区,新疆库尔勒841000 [4]胜利石油管理局黄河钻井总公司钻井四公司,山东东营257055

出　　处：《石油天然气学报》2009年第4期111-114,共4页Journal of Oil and Gas Technology

摘　　要：在阐述盐膏层蠕变规律的基础上,对某油田X区块盐膏层蠕变进行分析,利用有限差分模拟计算软件建立计算模型,通过数值模拟计算得出在不同钻井液密度下井眼缩径率随井深的变化规律,并绘制出盐膏层岩段不同缩径率下的钻井液密度图版,从而确定了顺利钻穿该区块盐膏层的合理钻井液密度。Drilling the evaporite beds was one of the major technical problems in drilling project.The determination of reasonable mud density was the key to successfully carry out the evaporate-bed drilling.The shrinkage of borehole was induced by plastic deformation.On the basis of denoting the rules of creep deformation of evaporate-bed,the creep deformation in Block X in a certain oilfield was analyzed,a model was established By using finite difference simulation software to calculate reducing rate which was changed with the increase of well depth at different densities by numerical simulation,and a chartboard of mud density was mapped for evaporite beds under different reducing rates,thus a reasonable density of the mud is determined for drilling the evaporite beds of this block successfully.

关 键 词：盐膏层 蠕变 缩径 钻井液密度 

分 类 号：TE254.1[石油与天然气工程—油气井工程]