高温高压井中温度和压力对钻井液密度的影响  

Effect of temperature and pressure on drilling fluid density in HTHP wells

作　　者：汪海阁[1] 刘岩生[2] 杨立平[2] 

机构地区：[1]石油勘探开发科学研究院钻井所,北京学院路100083 [2]中国海洋石油总公司渤海石油公司,天津塘沽300456

出　　处：《钻采工艺》2000年第1期56-60,共5页Drilling & Production Technology

摘　　要：文中研究了地温梯度、地表温度、入口钻井液温度、循环钻井液温度梯度和钻井液类型等因素对当量静态钻井液密度（ ＥＳＤ）的影响；建立了高温高压井中预测ＥＳＤ 的积分模型。结果表明：温度梯度对ＥＳＤ 影响很大。随温度梯度增加，ＥＳＤ 减小，且井口与井底ＥＳＤ 差值增大。随地表温度或钻井液入口温度增加，ＥＳＤ 减小，但不同初始温度条件下井口与井底ＥＳＤ 差值基本相同。不同钻井液体系的高温高压钻井液性能不同。静止时，随井深增加，ＥＳＤ减小；钻井液充分循环后，随井深增加，ＥＳＤ 增加。The paper has studied the effect of formation temperature gradient,surface temperature,circulating temperature gradient,drilling fluid inlet temperature and drilling fluid type on Equivalent Static Density (ESD).The integrating model of ESD has been established.The results show that temperature gradient has great impact on ESD.ESD decreases with temperature increasing,and the ESD difference between well surface and bottom is large.While ESD decreases with surface temperature or drilling fluid inlet temperature increasing,but the ESD difference is small.Drilling fluid HTHP behavior differs for different drilling fluid systems.During static state,ESD decreases with well depth,while ESD increases with well depth during drilling fluid circulating.

关 键 词：深井钻井 温度 压力 钻井液 密度 高温 高压 

分 类 号：TE254.1[石油与天然气工程—油气井工程]