US 11,946,369 B1
Determination of location and type of reservoir fluids based on downhole pressure gradient identification
Hamed Chok, Houston, TX (US); Bin Dai, Katy, TX (US); Christopher Michael Jones, Katy, TX (US); and Jonas Toelke, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Aug. 30, 2022, as Appl. No. 17/899,413.
Int. Cl. E21B 49/08 (2006.01); E21B 21/08 (2006.01); E21B 47/06 (2012.01)
CPC E21B 49/0875 (2020.05) [E21B 21/08 (2013.01); E21B 47/06 (2013.01); E21B 49/088 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving a measurement of a pressure in a subsurface formation at a number of depths in a wellbore formed in the subsurface formation across a sampling depth range of the subsurface formation to generate a number of pressure-depth measurement pairs;
partitioning the sampling depth range into a number of fluid depth ranges, wherein each of the number of fluid depth ranges comprises a range where a type of reservoir fluid is present in the subsurface formation;
performing a fitting operation over each of the number of fluid depth ranges to determine a fluid gradient for the type of the reservoir fluid for each of the number of fluid depth ranges; and
generating a solution set of one or more solutions based on the fluid gradient of the reservoir fluid for each of the number of fluid depth ranges determined from performing the fitting operation, wherein each solution defines a partitioning of the sampling depth range into the number of fluid depth ranges and the fluid gradient of each of the number of fluid depth ranges.