US 10,889,751 B2
Reservoir stimulation by energetic chemistry
Ahmed M. Shahin, Calgary (CA); and Bilu Cherian, Calgary (CA)
Assigned to Liberty Oilfield Services, LLC, Denver, CO (US)
Filed by Liberty Oilfield Services, LLC, Denver, CO (US)
Filed on Aug. 29, 2016, as Appl. No. 15/250,271.
Claims priority of provisional application 62/211,479, filed on Aug. 28, 2015.
Prior Publication US 2017/0081584 A1, Mar. 23, 2017
Int. Cl. C09K 8/592 (2006.01); C09K 8/588 (2006.01)
CPC C09K 8/592 (2013.01) [C09K 8/588 (2013.01); C09K 2208/32 (2013.01)] 19 Claims
 
1. A self-initiating, self-reactive treatment fluid for treating a hydrocarbon-bearing reservoir in a formation, comprising an aqueous solution comprising: (a) an ammonium salt capable of being exothermally oxidized to produce heat and nitrogen gas; (b) an oxidizing agent capable of oxidizing the ammonium salt; and (c) a free tertiary amine salt or a compound which reacts to form a free tertiary amine salt in situ; (d) a low molecular weight carboxylic acid; and (e) a high salinity brine containing divalent ions comprising Ca2+ and/or Mg2+; and (f) optionally, a surfactant.