US 12,380,969 B2
Designing cement that withstands perforations and other impact loads
Siva Rama Krishna Jandhyala, The Woodlands, TX (US); Thomas Jason Pisklak, Houston, TX (US); Ronnie Glen Morgan, Duncan, OK (US); and John Paul Bir Singh, Kingwood, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Dec. 14, 2021, as Appl. No. 17/550,767.
Prior Publication US 2023/0187029 A1, Jun. 15, 2023
Int. Cl. G16C 20/30 (2019.01); C09K 8/46 (2006.01); G16C 20/70 (2019.01)
CPC G16C 20/30 (2019.02) [C09K 8/46 (2013.01); G16C 20/70 (2019.02)] 18 Claims
OG exemplary drawing
 
1. A method for designing a composition, the method comprising:
(a) selecting at least a cementitious material and concentration thereof and a water and concentration thereof to form a cement slurry recipe;
(b) calculating a toughness for the cement slurry recipe using a toughness model wherein the toughness model comprises an input of physicochemical properties of components of the cement slurry recipe, wherein the toughness model comprises an equation of the following form:

OG Complex Work Unit Math
where A is a constant, w/B is water to blend ratio of water to other components of the cement slurry recipe, f ( ), g ( ), h ( ), p ( ) and k ( ) are functions, Ca/Si is a calcium to silica ratio, Al/Si is an aluminum to silica ratio, T is temperature, P is pressure, PSD is a particle size distribution of particulates in the cement composition and φ is the shape factor of the particulates in the cement slurry recipe;
(c) comparing the toughness of the cement slurry recipe to a toughness requirement;
(d) repeating steps (a)-(c) if the calculated toughness of the cement slurry recipe does not meet or exceed the toughness requirement, wherein each repeated step of selecting comprises selecting different concentrations and/or different chemical identities for at least the cementitious material and/or water than previously selected; and
(e) preparing a cement slurry based on the cement slurry recipe, the cement slurry including a toughness that meets or exceeds the toughness requirement.