高含硫气田井底落鱼井安全生产技术探讨

Technology Investigation of Safe Production of Gas Well with Bottom Fish in High Sulfur Content Gas Field

在高含硫气井完井作业过程中,由于操作失误导致作业工具掉入井下形成井底落鱼。落鱼打捞作业难度大,滞留井底易产生腐蚀,形成残渣。为解决腐蚀残渣冲蚀、堵塞井筒及生产设备等问题,在落鱼腐蚀特征研究的基础上,应用临界冲蚀流量、临界携硫颗粒流量及临界携液流量模型,通过气井产能优化,建立安全生产工艺。

In high sulfur content well completion process, some tool fell into the bottom and formed the ＇fish＇ be- cause of operation failure. ＇Fish＇ is difficult to be salvaged and easy to produce corrosion at the bottom and form residues. In order to solve the problems as residues erosion, shaft and production equipment block, on the basis of the corrosion characteristics of ＇fish＇, we can use the critical erosive flow, the critical carrying sulfur particles flow and the critical liquid carrying flow rate model to optimize deliverability, and then set up a safe production process.