Patent ID: 9586863
Date: 2017-03-07
CPC Classifications: C04B,C09K,E21B,Y02W

Claim:
1. A method, comprising: (i) selecting at least one casing string having a casing linear thermal expansion coefficient (LCTE); (ii) preparing a set cement slurry that contains at least one carbonaceous material, and measuring a set cement LCTE of the set cement slurry, (iii) comparing the casing LCTE to the set cement LCTE; (iv) if the set cement LCTE is higher than the casing LCTE, and is between 11·10 (v) installing the casing string in a thermal recovery well; (vi) performing a cementing operation such that the cement slurry is placed adjacent to the at least one casing string, and allowing the cement slurry to set in the thermal recovery well; and (vii) applying heat to the thermal recovery well such that a well temperature varies between 150° C. and 700° C., causing the at least one casing string and the set cement slurry to undergo linear expansion without the formation of a microannulus between the at least one casing string and the set cement.