利用井温分布估算莺-琼盆地地下流体运移速度

基金项目:

国家自然科学基金(编号：49732005)和香港王宽诚基金资助

AN ESTIMATE OF THE RATE OF UNDERGROUND FLUID FLOW FROM WELL-TEMPERATURE DATA IN YING-QIONG BASIN

摘要: 莺-琼盆地是典型的高温高压盆地,现今平均地表热流78.7mW/m²,产生地表高热流的主要原因是深部热流体活动。根据盆地地温场分布特征与地下流体活动规律的关系,利用井温资料,我们计算了典型钻孔LD30-1-1A井地下流体的流速分布。结果表明,LD-30-1-1A井地下流体可分为上、中、下三段。上段流体运动微弱,垂向流速仅为8.33×10^-12 cm/s;中段流体向下垂向流速为4.37×10^-8 cm/s;下段流体向上垂向流速为2.65×10^-8 cm/s.
- 莺-琼盆地 /
- 井温分布 /
- 地下流体流速
Abstract: The Ying-Qiong basin is a typical high temperature and high pressure basin.The value of heat flow in this basin averages as high as 78.7mW/m² which is revealed to be caused by active thermal fluid at depth.Based on the relationship between the geothermal field and the activity of underground fluid,we have calculated the distribution of the fluid flow rate from the temperature data of well LD30-1-1A.The results show that the vertical fluid flow rate is as slow as 8.33×10^-12 cm/s in the upper part of the well 4.37×10^-8 cm/s downward in middle part,and 2.65×10^-8 cm/s upward in the lower part.
- Ying-Qiong basin /
- Well-temperature curve /
- underground fluid flow rate