Shaft interior temperature distribution semi-analytical determination method and device
A technology of temperature distribution and determination method, applied in the direction of buildings, etc., can solve problems such as many required parameters, large temperature difference, and cumbersome solution process.
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[0109] The concrete steps that the technical solution of this embodiment realizes comprises:
[0110] 1) Basic parameters: the depth H, m of the well is obtained from the drilling and completion data; the geothermal gradient m and surface temperature t are obtained from the test data of the well es , °C; the water equivalent W of the produced fluid is obtained from the production data, W / °C; based on the knowledge of heat transfer, the linear relationship between the heat transfer coefficient k between the inside and outside of the tubing and the temperature t is obtained, k=at+b.
[0111] 2) if Figure 4 Shown is the schematic diagram of the section of the production well in the embodiment. Using the idea of nodes, the research system is divided into N sections along the wellbore, with a total of N+1 nodes. Section i, that is, in the interval (h i-1 , h i ), according to the energy balance:
[0112] W i dt i =k i (t i -t ei )dh i (1)
[0113] In the formul...
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