Mud Temperature Effects on Lost Returns

Mud Temperature Effects on Lost Returns PowerPoint PPT Presentation


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Original Concept. . Temperature Effects on Borehole. Higher borehole temperatures (from hot drilling fluids) will cause the rock to try to expand.Since it cannot expand outward it tries to expand radially and towards the inside of the borehole.Since it cannot expand, the hoop stress level in the r

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Mud Temperature Effects on Lost Returns

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1. Mud Temperature Effects on Lost Returns For Deepwater Wells

2. Original Concept

3. Temperature Effects on Borehole

4. Temperature Effects on Borehole

5. Increasing the Drilling Window

6. Lost Returns Problems

7. Production Field Data

8. Temperature Effects on Borehole

9. SPE 25732. " predicts an increase of the actual LOT value at the shoe when deepening the hole, with respect to the measurements made at the beginning of the drilling phase.“ SPE 71366. States that " the breakdown mud weight decreases by .03 ppg …for every 1 deg centigrade of cooling of a vertical well." SPE 29428. Says " Borehole stress evaluation shows how the near well-bore fracture gradient can be exceeded, when cooling is combined with ECD." More Documentation

10. The Well Test Guerrera 90

11. Test Well Procedure

12. Well Test Results

13. Well Test Results

14. Test Well

15. Test Well

16. Test Well

17. Historical Data In Deepwater

18. Well # 1

19. Well # 2

20. Cementing

21. Frac Gradient Plus For Cementing

23. Circulating Hot Muds Results in a total formation temperature increase of 50F

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