钻井液对页岩井壁的稳定性能评价方法探讨
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摘要
页岩气钻完井过程中较易出现掉块、反复划眼和憋停顶驱等井下复杂情况,因此井壁稳定是技术难题之一。较为精准地评价钻井液对页岩的井壁稳定能力,在坍塌周期内选取合理的钻井液钻完井成为关键。通过室内实验,分析钻井液对页岩井壁稳定性评价方法的优缺点,以期为不同页岩气地层合理选用钻井液提供参考依据。
In the process of shale gas drilling and completion well, it is easy to occur complex downhole conditions such as block falling,repeated reaming and bit bouncing. Therefore, wellbore stability is one of the technical difficulties.It is the key to accurately evaluate the stability of drilling fluid to shale wellbore and to select reasonable drilling fluid to drilling and completion well in collapse period. The advantages and disadvantages of the evaluation methods for stabilizing effect of drilling fluid on shale well wall are analyzed in order to provide reference for reasonable selection of drilling fluid in different shale gas formations.
In the process of shale gas drilling and completion well, it is easy to occur complex downhole conditions such as block falling,repeated reaming and bit bouncing. Therefore, wellbore stability is one of the technical difficulties.It is the key to accurately evaluate the stability of drilling fluid to shale wellbore and to select reasonable drilling fluid to drilling and completion well in collapse period. The advantages and disadvantages of the evaluation methods for stabilizing effect of drilling fluid on shale well wall are analyzed in order to provide reference for reasonable selection of drilling fluid in different shale gas formations.
引文
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[8]刘社明,董易凡,杨圣方,等.高效水基钻井液在苏里格南小井眼的应用与评价[J].石油工业技术监督,2017,33(9):8-11.
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[3]吕开河,高锦屏,樊泽霞.井壁化学稳定性评价方法分析[J].钻井液与完井液,2001,18(5):34-35.
[4]吕开河,李会亮.井壁化学稳定性综合评价模型及其应用[J].钻井液与完井液,2003,20(5):20-22.
[5]赵虎,司西强,王忠瑾,等.氯化钙-烷基糖苷钻井液室内研究[J].钻井液与完井液,2014,31(5):1-5.
[6]赵虎,司西强,甄剑武,等.氯化钙-烷基糖苷钻井液页岩气水平井适应性研究[J].钻井液与完井液,2015,32(6):22-25.
[7]唐文泉,高书阳,王成彪,等.龙马溪页岩井壁失稳机理及高性能水基钻井液技术[J].钻井液与完井液,2017,34(3):21-26.
[8]刘社明,董易凡,杨圣方,等.高效水基钻井液在苏里格南小井眼的应用与评价[J].石油工业技术监督,2017,33(9):8-11.