Selective wellbore coatings to control fines damage in coal seam gas wells

该项目旨在开发一种全新的方法，利用选择性相转化聚合物涂层来控制煤层气井中的固体产量。该方法将利用泥岩的低渗透性，在富粘土层之间形成保护屏障，同时在产气煤层之间保持渗透性。细粒固体的产生是影响昆士兰州煤层气井产能的关键技术问题，每年导致10-15天的停产。该项目的预期成果包括对固体破裂现象的基本理解，对煤层气井中潜在固体风险进行分类的预测工具，以及控制固体生成的新型岩石选择性井筒涂层技术。该项目的潜在经济影响是降低天然气生产成本和提高天然气供应安全性。

This project aims to develop a completely new approach to control solids production in coal seam gas wellbores using a selective phase-inversion polymer coating. The approach will take advantage of the low permeability of mudrocks to form a protective barrier across clay-rich layers while remaining permeable across the gas-producing coal seams. The production of fine solids is a key technical issue affecting the productivity of coal seam gas wells in Queensland, and leads to 10-15 days’ production downtime a year. The expected outcomes of the project include fundamental understanding of the solids breakage phenomena, a predictive tool to classify potential solids risks in coal seam gas wells, and a novel rock-selective wellbore coating technology to control solids production. The potential economic impacts from the project are lower gas production costs and improved gas supply security.