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.