汶川科钻 WFSD -4孔钻井液 CO2污染及其处理

详细信息

刊出日期: 2014-04-10

Drilling Fluid CO2 Contamination in WFSD-4 of Wenchuan Scientific Drilling and the Treatment

Publish Date: 10 April 2014

摘要: 汶川地震科学钻探四号孔( WFSD-4)在二开钻进过程中,钻井液受到了较为严重的CO2污染,造成钻井液性能变坏,具体表现为粘切升高,流动性变差,影响了正常钻进。通过分析CO2污染钻井液的影响因素,并结合钻井液遭受CO2污染的机理和特点,在室内实验和现场应用的基础上,总结出了CO2污染的规律、性能特征及相应的处理措施:即在保证钻井液pH值的条件下,通过石灰除去钻井液中的酸根离子等。
- 钾石灰聚磺钻井液 /
- CO2污染 /
- 钻井液性能 /
- WFSD-4孔
Abstract: In the process of the fourth hole (WFSD-4) of Wenchuan earthquake scientific drilling project, the drilling fluid was contaminated by CO2 seriously and the drilling fluid performance was deteriorated with sticking&cutting increas-ing and poor liquidity, by which normal drilling was affected.Through the analysis on the influence factors of CO2 on drill-ing fluid and according to the mechanism and characteristics of drilling fluid contamination by CO2 , the contamination rules, performance characteristics and corresponding treatment measures are summed up based on the laboratory experi-ments and field application cases:with pH value of drilling fluid keeping, acid radical ion etc.in drilling fluid can be re-moved by lime.
- potassium lime polysulfonate drilling fluid /
- CO2 contamination /
- drilling fluid performance /
- WFSD-4