Method of well treatment

• US 7,270,184 B2
• Filed: 03/27/2002
• Issued: 09/18/2007
• Est. Priority Date: 03/30/2001
• Status: Expired due to Term

• Current Assignee: Statoil Petroleum As (Asa Equinor)
• Original Assignee: Statoil ASA (Asa Equinor)
• Inventors: Kotlar, Hans Kristian, Sjöblom, Johan, Schilling, Birgitte
• Primary Examiner(s): SUCHFIELD, GEORGE A
• Application Number:
  US10/472,181
• Publication Number:
  US 20050115710A1
• Time in Patent Office: 2,001 Days
• Field of Search: 166/278, 166/279, 166/280.2, 166/294, 166/295, 166/300, 507/203, 507/221, 507/224, 507/231, 507/263, 507/267, 523/130
• 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 polymerizable monomer, 0.5 to 20% wt. of a crosslinking oil soluble polymerizable monomer, and 0.04 to 0.15% wt. of a polymerization initiator said monomers constituting from 2 to 40% wt. of said discontinuous phase.

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 droplet size 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 85 to 98% wt. of a saturated liquid hydrocarbon as a non-polymerizable, 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 further containing a stabilizer.

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

13. A well treatment chemical emulsion as claimed in claim 10 as a hydrocarbon well treatment agent.