Patent ID: 8887806
Filing Date: 2014-11-18
Classification: C04B,C09K,E21B

Abstract:
1. A method of servicing a wellbore comprising: preparing a dry cement bland comprising a base cement and a crystalline component and mixing the dry cement blend to homogeneity wherein the dry cement blend is formulated based on an initial dry cement blend formulation; obtaining an experimental diffraction pattern of a sample of the dry cement blend wherein the sample has not been admixed with water; generating a model diffraction pattern; refining the model diffraction pattern to generate a refined model diffraction pattern wherein refining comprises subjecting the model diffraction pattern to a structural refinement method; determining a type and amount of crystalline- and noncrystalline components present in the dry cement blend based on the refined model diffraction pattern; generating a final dry cement blend formulation by adjusting one or more components of the initial dry cement blend formulation in response to the refined model diffraction pattern; and comparing the initial dry cement blend formulation to the final dry cement blend formulation, wherein a compressive strength of a slurry formed from the initial dry cement blend formulation differs from the a compressive strength of a slurry formed from the final dry cement blend formulation by less than about 10%; contacting the final dry cement blend formulation with water and one or more additives to form a cement slurry; placing the cement slurry downhole; and allowing the cement slurry to set.