川西深层井壁稳定及参数敏感性研究  

RESEARCH ON PARAMETER SENSITIVITY AND WELLBORE STABILITY OF DEEP WELL IN THE WEST OF SICHUAN BASIN

作　　者：齐从丽 钟敬敏 钟水清[2] 王德康[3] 

机构地区：[1]中石化西南分公司工程技术研究院 [2]西南石油大学 [3]四川石油局钻井处

出　　处：《钻采工艺》2007年第6期19-21,共3页Drilling & Production Technology

基　　金：国家自然科学基金资助项目(编号:90210022)

摘　　要：井壁稳定性研究是工程方案决策的重要依据,以Mohr-Coulomb准则为基础,分析了对井壁稳定性判断产生影响的各项参数,以及在川西深层条件下,井壁稳定性判断中各项参数对地层坍塌压力和破裂压力计算结果的影响程度。通过实例分析表明,在川西深层条件下,地应力、地层孔隙压力和岩石的弹性系数等参数的准确程度对井壁稳定性分析结果影响程度最大,而其它岩石力学参数的影响次之。分析结果同时证明,如果在川西深层采用定向井钻井,其井壁稳定性将不会因为井斜角、相对方位角的变化而变差,且地层破裂压力会随井斜角和相对方位角的增加而大幅提高。Wellbore stability research is the important basis of engineering design.On the basis of the Mohr-Coulomb rule,the paper analyzed the various parameters which effecting the wellbore stability,and it also found out the influence degree of every parameter on the wellbore stability judgement in the West Sichuan.The research indicated that the ground stress,pore pressure and the rocky Biot's elasticity coefficient play the leading role in the wellbore stability study,and the other rock mechanical parameters follow.Meanwhile,it also figured out that the wellbore stability of directional well in the west Sichuan will be more better than the straight well with the increasing of the deviation and relative azimuth.

关 键 词：钻井 井壁稳定 参数敏感性 地应力 孔隙压力 岩石力学参数 井眼轨迹 参数 

分 类 号：TE21[石油与天然气工程—油气井工程]