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营山103井位于川中古隆平缓构造区的仪陇—营山构造群内的营山构造Ⅰ高点上的一口预探井,其储层主要分布于雷口坡组雷四段及须家河组须四、须二段,从保护储层、提高机械钻速、防治井漏的目的出发,设计在须六~雷四段油气层段采用常规钻井液欠平衡钻进(遇见良好显示层段进行取心作业)。在该区块的钻探程度和研究程度比较低,具体的储层类型、储层分布不均。本文主要介绍欠平衡钻井技术在本井的应用、工艺流程、技术措施、进行分析总结。
Well Ying 103 Wells are located in the Yanshan-Yingshan tectonic group of the Gulong Formation in the Central Sichuan Basin. The reservoirs are mainly distributed in the Leiyasu Section of the Leikoupo Formation and the Xujiahe In order to protect the reservoir, increase the penetration rate of the machine and prevent the loss of the well, we designed to use the conventional drilling fluid under balanced drilling (see the well-developed interval Coring work). Drilling degree and research level in this block are relatively low, with specific reservoir types and uneven reservoir distribution. This article introduces the application of underbalanced drilling technology in this well, process flow, technical measures, and analysis and summary.