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

用于控制煤层气井细粉损害的选择性井眼涂层

• 批准号: LP160101531
• 负责人: A/Prof Thomas Rufford
• 金额: $ 15.98万
• 依托单位: The University of Queensland
• 依托单位国家: 澳大利亚
• 项目类别: Linkage Projects
• 财政年份: 2018
• 资助国家: 澳大利亚
• 起止时间: 2018-04-05 至 2021-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LP160101531
• 关键词: Selective; wellbore; coatings; control; fines

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.

该项目旨在开发一种全新的方法，使用选择性相转化聚合物涂层来控制煤层气井筒中的固体产生。该方法将利用泥岩的低渗透性，在富含粘土的层之间形成保护屏障，同时在产气煤层之间保持渗透性。细粒固体的产出是影响昆士兰州煤层气威尔斯井产能的一个关键技术问题，每年造成10-15天的停产。该项目的预期成果包括对固体破碎现象的基本了解、对煤层气威尔斯井中潜在固体风险进行分类的预测工具以及控制固体产量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。