石油钻采工艺Issue(4)：45-49,5.DOI:10.13639/j.odpt.2015.04.013
强抑制、抗高温防塌钻井液在董8井中的应用
The use of drilling lfuid te of strong inhibition, anti-high temperature and anti-collapse in Well Dong-8
摘要
Abstract
Well Dong-8 is an important exploratory vertical well placed in Junggar Basin bySINOPEC. Its total depth is 5 580 m. Tight hole was frequently met during tripping in the upper part of the well, and in the lower part, the Jurassic coalbeds were deposited. Moreover, the formation pressure was anomalous and wellbore instability was severe during drilling. The Sangonghe Formation has high-pressure saltwater layers and is contaminated by bicarbonate lfuid, so the rheology of drilling lfuid under high density is not easily controlled. In view of its geologic characteristics and through indoor studies, it was determined that the aluminum-amine strong inhibition and anti-sloughing drilling lfuid system and high-temperature iflm forming anti-sloughing drilling lfuid system are used. Field application results show that the drilling lfuid systems used have overcome the dififculties of tight hole in the upper soft mudstone, sticking in sandstone section and instability of Jurassic wellbore. The average enlargement rate of the entire hole was only 7.02%, which was quite satisfactory.关键词
董8井/防塌钻井液/煤层/高压/流体污染/井壁稳定Key words
Well Dong-8/anti-collapse drilling lfuid/coalbed/high pressure/lfuid contamination/wellbore stability分类
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邱春阳,赵立新,司贤群,何兴华,王宝田,渠震龙..强抑制、抗高温防塌钻井液在董8井中的应用[J].石油钻采工艺,2015,(4):45-49,5.基金项目
中石化先导项目“准噶尔盆地西山窑组井壁稳定技术应用研究（SG12030）”及胜利石油管理局项目“准噶尔盆地钻井液技术研究与应用”（GKZ1211）部分内容。 （）
