US 11,808,148 B2
Systems and methods for back-allocation of oil produced by waterflooding
Javad Rafiee, Houston, TX (US); and Pallav Sarma, Houston, TX (US)
Assigned to Tachyus Corporation, Houston, TX (US)
Filed by Tachyus Corporation, Houston, TX (US)
Filed on Dec. 30, 2020, as Appl. No. 17/138,582.
Prior Publication US 2022/0205359 A1, Jun. 30, 2022
Int. Cl. E21B 49/08 (2006.01); G06Q 50/02 (2012.01); G01V 99/00 (2009.01); G06N 20/20 (2019.01)
CPC E21B 49/087 (2013.01) [G01V 99/005 (2013.01); G06N 20/20 (2019.01); G06Q 50/02 (2013.01); E21B 2200/20 (2020.05)] 21 Claims
OG exemplary drawing
 
1. A computer-implemented method for determining the production rate of oil produced from each of a plurality of wells in an oil field with a plurality of oil-bearing geological layers, the method comprising:
allocating injected fluid into each layer of a plurality of oil-bearing geological layers to a plurality of paths from injection sites of injection wells to production wells in each layer by balancing the mass of fluid injected into and the total fluid recovered from each oil-bearing geological layer,
calculating estimated geological properties for each path in the plurality of paths to match total oil and injection fluid recovered at each production well in the plurality of production wells, and
using the estimated geological properties, calculating an oil production rate for each path between an injector well and a production well in a geological layer.