定向井欠压值设计中环空压耗分析模型的建立与应用  

Development and application of the annular pressure loss analysis model for the negative differential pressure design of directional well

作　　者：沈海超[1] 胡晓庆 王磊 

机构地区：[1]中国石化国际石油勘探开发有限公司 [2]中海油研究总院 [3]中海石油(中国)有限公司上海分公司

出　　处：《中国海上油气》2013年第4期49-53,共5页China Offshore Oil and Gas

摘　　要：目前的定向井环空压耗分析普遍没有考虑偏心环空及岩屑床的影响,导致实际欠压值比设计值明显偏低,直接影响了定向井欠平衡技术的实施效果。在前人研究的基础上,综合考虑斜井段偏心环空及岩屑床的影响,总结并建立了一套斜井段环空压耗分析半经验模型。实例分析表明,该模型可明显提高斜井段环空压耗计算精度,可为定向井欠压值的科学设计以及欠平衡钻进过程中井底压力的动态控制提供参考。The effect of eccentric annulus and cut tings bed has not been considered into the presentannular pressure loss analysis, and it leads to actu al negative differential pressure lower than the de signed value, which affect the implementation effect of underbalanced drilling. On the basis of previous researches, a semiempirical model for a nalysis of annular pressure loss of deviated interval has been developed considering the effects of ec centric annulus and cuttings bed. Case study shows that the model can improve the accuracy of the annular pressure loss analysis significantly, and it is useful for the design of negative differenti al pressure and the dynamic control of the bottom hole pressure during underbalanced drilling.

关 键 词：定向井 环空压耗分析偏心环空 岩屑床 半经验模型 欠压值设计 

分 类 号：TE246[石油与天然气工程—油气井工程]