HOW TO MAKE WELLSTICK DIAGRAM?

 A wellstick diagram is a chart that shows the thickness of the markers in each well sorted by interpretation interest. There is a variety of information that we can get from wellstick diagrams such as estimating the direction of deposition and estimating the presence of structures. Wellstick diagrams can be powerful tools for initial geological interpretation. They are often used in reservoir studies, oil and gas exploration, and geological modelling. Usually wellstick diagrams are depicted with stacked bar charts.  

Wellstick Diagram Example

---

Customise Wellstick Diagram

Unit of Thickness: Meter (m) Feet (ft)

Number of Wells:

HOW TO DETERMINE GEOTHERMAL GRADIENT?

The temperature beneath the surface increases as the depth increases. The data used to calculate the subsurface temperature includes geothermal gradient, depth, and the surface temperature data from the well being evaluated. The formula used to calculate the subsurface temperature is as follows:

T_d = T_s + (G_g × d)

• T_d = Temperature at a specific depth
• T_s = Surface temperature
• G_g = Geothermal gradient
• d = Depth

However, if the geothermal gradient data is not available, linear regression can be applied to obtain the geothermal gradient value from the temperature and depth data.

Geothermal Gradient Example

---

Calculate your Geothermal Gradient and Get the Graph!

Enter the surface and bottom hole temperatures, and depths, to calculate the geothermal gradient and see the graph.

Unit System: Celsius and Meters

Surface Temperature (°C):

Bottom Hole Temperature (°C):

Surface Depth (m):

Bottom Hole Depth (m):

Geothermal Gradient (Celsius and Meter): 14.94 °C/100 m
Geothermal Gradient (Fahrenheit and Feet): 27.19 °F/100 ft