鄂尔多斯盆地西南缘供水井质量恶化原因分析及对策

Analysis on the Cause of Water Well Quality Degradation in the Erdos Basin Southwest Edge and the Countermeasures

摘要:

作为极度缺水的鄂尔多斯盆地西南缘地区，针对白垩系含水地层采水的供水井很多，但供水井水质恶化和水量减小的现象较为普遍，其原因主要是井身结构严重不合理所致。通过对造成供水井质量恶化的原因分析，找出了止水方法的不合理性与泥岩缩径造成井身变形而致水量减小的问题实质，提出了科学合理的成井方案，从而有效地解决了供水井质量恶化问题，提高了供水井使用寿命。

关键词:供水井;水质恶化;水量减小;缩径;水泥固井;骨架管;成井结构;鄂尔多斯盆地

Abstract:

The southwest edge of Erdos basin is an extreme water shortage area. There are many water wells in cretaceous water-bearing formation, but water quality degradation and water quantity decreasing are common phenomenon, which is mainly caused by the serious unreasonable well structure. Based on the analysis on the causes of water well quality degradation, the substantial issues was found that water quantity decreasing was caused by well structure deformation because of unreasonable water stoppage method and diameter shrinkage in mudstone. The scientific and reasonable well-forming scheme was put forward to solve the water well quality issue and prolong the water well service life.

Key words:water well; water quality degradation; water quantity decreasing; diameter shrinkage; well cementing; framework pipe; well structure; Erdos basin