井壁稳定的化学动力学分析  

Analysis on chemical kinetics of wellbore stability

作　　者：张艳娜[1,2] 孙金声 王强[3] 蒋欢[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油集团钻井工程技术研究院,北京100083 [3]长江大学城市建设学院,湖北荆州434023

出　　处：《断块油气田》2011年第6期794-798,共5页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项"深井高温钻井液及高温高压固井等配套工艺技术"(2008ZX05021-004)

摘　　要：钻井液体系与泥页岩井壁之间存在化学作用。但是,在钻井液研究中,各种化学作用力多以文字的形式表述出来,很少见到有系统的数学公式表达。通过研究各种化学作用力的公式,如范德华力、静电引力、平行板电势能、毛细管张力、基质吸力、渗透压及浓差极化边界阻力等,并运用这些公式,定量描述了化学驱动力的大小。同时,还引用一些实验数据,验证了公式的正确性,为今后分析钻井液对井壁稳定性的化学作用起到了指导作用。The effect of drilling fluid on the wellbore stability of shale is widely approved. However, various chemical acting forces are described with words and systematic formulas are rarely seen in the process of drilling fluid study. This paper systematically gives all kinds of chemical acting force formulas, including VDW, electrostatic attraction, boundary resistance of concentration polarization, capillary tension, matrix suction, osmotic pressure and parallel-plate electric potential energy. The chemical driving force can be quantitatively described through the use of these formulas. Validity of formula is verified with some experimental data in the paper, which affords the reference for the analyses of the effect of drilling fluid on the chemical action of wellbore stability.

关 键 词：钻井液 井壁稳定 化学动力学 作用力 

分 类 号：TE254[石油与天然气工程—油气井工程]