Method of well treatment

• US 20050115710A1
• Filed: 03/27/2002
• Published: 06/02/2005
• Est. Priority Date: 03/30/2001
• Status: Active Grant

• Current Assignee: Statoil Petroleum As (Asa Equinor)
• Original Assignee: Statoilhydro ASA
• Inventors: Sjoblom, Johan, Kotlar, Hans Kristian, Schilling, Birgitte
• Granted Patent: US 7,270,184 B2
• Time in Patent Office: Days
• US Class Current: 166/295
• CPC Class Codes: C09K 8/502 Oil-based compositions
• CPC Class Codes: C09K 8/565 Oil-based compositions
• CPC Class Codes: G01V 15/00 Tags attached to, or associated with, an object, in order to enable detection of the object record carriers for use with machines having a detectable tag or marker G06K19/00

Abstract

The invention provides a method of well treatment comprising introducing into the matrix surrounding a hydrocarbon well bore hole an emulsion the discontinuous phase of which comprises a non-polymerizable, water or oil miscible liquid carrier, a polymerizable monomer and a thermally activated polymerization initiator, said monomer constituting from 2 to 40% wt. of said discontinuous phase.

Claims

1. A method of well treatment comprising introducing into the matrix surrounding a hydrocarbon well bore hole an emulsion the discontinuous phase of which comprises a non-polymerizable, water or oil miscible liquid carrier, a polymerizable monomer and a thermally activated polymerization initiator, said monomer constituting from 2 to 40% wt. of said discontinuous phase.

2. A method as claimed in claim 1 wherein said discontinuous phase contains both non-crosslinking and crosslinking monomers.

3. A method as claimed in claim 1 wherein said discontinuous phase is oil-miscible and wherein the continuous phase of said emulsion is aqueous.

4. A method as claimed in claim 1 wherein said emulsion further contains a stabilizer.

5. A method as claimed in claim 1 wherein said discontinuous phase contains 2 to 30% wt. of a non-crosslinking oil-soluble monomer, 0.5 to 20% wt. of a crosslinking oil soluble monomer, and 0.04 to 0.15% wt. of a polymerization initiator.

6. A method as claimed in claim 1 wherein said monomer is a styrenic monomer.

7. A method as claimed in claim 1 wherein said monomer is an acrylic or vinyl monomer.

8. A method as claimed in claim 1 wherein the droplets of the discontinuous phase in said emulsion have a particle size D (v, 0.5) of from 1 to 50 μ

m.

9. A method as claimed in claim 1 wherein said bore hole is a producer hole.

10. A well treatment chemical emulsion the discontinuous phase of which comprises a non-polymerizable, water or oil miscible liquid carrier, a polymerizable monomer and a thermally activated polymerization initiator, said monomer constituting from 2 to 40% wt. of said discontinuous phase.

11. An emulsion as claimed in claim 10 wherein said discontinuous phase contains 85 to 98% wt. of a saturated liquid hydrocarbon.

12. An emulsion as claimed in claim 10 further containing a stabilizer.

13. An emulsion as claimed in claim 10 whereof said discontinuous phase constitutes 2 to 40% by volume.

14. A well treatment chemical emulsion the discontinuous phase whereof comprises a polymerizable monomer, a thermally-activated polymerization initiator, and a non-polymerizable, water or oil miscible liquid carrier as a hydrocarbon well treatment agent.