US2008190610A1PendingUtilityA1

Fracture Clean up Method

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Assignee: BARMATOV EVGENY BORISOVICHPriority: Feb 13, 2007Filed: Feb 12, 2008Published: Aug 14, 2008
Est. expiryFeb 13, 2027(~0.6 yrs left)· nominal 20-yr term from priority
Inventors:Evgeny Borisovich BarmatovKonstantin Mikhailovich LyapunovAlexander Victorovich GolovinJonathan E. Abbott
C09K 8/72C09K 8/52C09K 8/70E21B 43/267E21B 37/00
42
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Claims

Abstract

Methods including the pumping of fracturing fluid carrying proppant. Simultaneously particulate is pumped made of substance that under subterranean temperature releases hydrochloric or etching acid precursor, wherein the said acid precursor reacts with the formation water and produces acid. The methods stimulate the inflow of formation fluid towards the well due to cleaning of the surface of hydrofracture and due to growth of its area.

Claims

exact text as granted — not AI-modified
1 . A method for fracture clean up that includes the delivery to the fracture of a substance capable to produce inorganic acid; the fracture is propped by a mixture of proppant and particulate that produces hydrochloric acid precursor under subterranean conditions and due to reaction with formation fluid. 
   
   
       2 . The method in accordance with  claim 1 , wherein the particulate is particles of polyvinylchloride and/or its copolymers. 
   
   
       3 . The method in accordance with  claim 1 , wherein the particulate is particles of polyvinyldenchloride. 
   
   
       4 . The method in accordance with  claim 3 , wherein the granulated ammonium chloride or fluoride coated with oil-soluble composition is employed. 
   
   
       5 . The method in accordance with  claim 1 , wherein the particulate is particles of copolymers of polyvinyldenchloride. 
   
   
       6 . The method in accordance with  claim 5 , wherein the granulated ammonium chloride or fluoride coated with oil-soluble composition is employed. 
   
   
       7 . The method in accordance with  claim 1 , wherein the particulate is particles of polyvinyldenchloride and its copolymers. 
   
   
       8 . The method in accordance with  claim 7 , wherein the granulated ammonium chloride or fluoride coated with oil-soluble composition is employed. 
   
   
       9 . A method for fracture clean up that includes the delivery to the fracture of a substance capable to produce inorganic acid; the fracture is propped by a mixture of proppant and particulate that produces etchingc acid precursor under subterranean conditions and due to reaction with formation fluid. 
   
   
       10 . The method in accordance with  claim 9 , wherein the particulate is particles of polyvinylchloride and/or its copolymers. 
   
   
       11 . The method in accordance with  claim 9 , wherein the particulate is particles of polyvinyldenchloride. 
   
   
       12 . The method in accordance with  claim 11 , wherein the granulated ammonium chloride or fluoride coated with oil-soluble composition is employed. 
   
   
       13 . The method in accordance with  claim 9 , wherein the particulate is particles of copolymers of polyvinyldenchloride. 
   
   
       14 . The method in accordance with  claim 13 , wherein the granulated ammonium chloride or fluoride coated with oil-soluble composition is employed. 
   
   
       15 . The method in accordance with  claim 9 , wherein the particulate is particles of polyvinyldenchloride and its copolymers. 
   
   
       16 . The method in accordance with  claim 15 , wherein the granulated ammonium chloride or fluoride coated with oil-soluble composition is employed. 
   
   
       17 . The method in accordance with  11  wherein the particulate size varies from 0.1 microns to 10 mm. 
   
   
       18 . The method in accordance with  11  wherein the content of polyvinylchloride and polyvinyldenchloride in copolymers is from 0.1 wt. % to wt. 99.9%. 
   
   
       19 . The method in accordance with  11  wherein the content of chlorine in particulates is from 0.01wt. % to wt. 85%. 
   
   
       20 . The method in accordance with  11  wherein the mass proportion of particulates to the mass of proppant is from 0.1wt. % to wt. 99.9%. 
   
   
       21 . The method in accordance with  1  wherein the particulate size varies from 0.1 microns to 10 mm. 
   
   
       22 . The method in accordance with  1  wherein the content of polyvinylchloride and polyvinyldenchloride in copolymers is from 0.1 wt. % to wt. 99.9%. 
   
   
       23 . The method in accordance with  1  wherein the content of chlorine in particulates is from 0.01 wt. % to wt. 85%. 
   
   
       24 . The method in accordance with  1  wherein the mass proportion of particulates to the mass of proppant is from 0.1 wt. % to wt. 99.9%.

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