APPARATUSES, SYSTEMS, AND METHODS FOR FORMING IN-SITU GEL PILLS TO LIFT LIQUIDS FROM HORIZONTAL WELLS
First Claim
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1. A method for cleaning horizontal section of wells comprising the steps of:
- injecting a gelled, gelling or gellable composition into a horizontal section of a well at a location a distance δ
from a toe end of the well, the toe section,forming a gelled pill at the location, andpushing the gelled pill and accumulated liquids through the horizontal section of the well into the heal section of the well using gas pressure on a toe end side of the gelled pill.
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Abstract
Methods include the injection of a gelled, gelling or gellable composition into a horizontal section of a well at a location, where produced well gases or a combination of well gases and injected gases are sufficient to move the pill through the horizontal section into heal section, sweeping the horizontal section of accumulated liquids. Once in the heal section, the pill and the accumulated liquids are uplifted to the surface resulting in a cleaned well.
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Citations
35 Claims
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1. A method for cleaning horizontal section of wells comprising the steps of:
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injecting a gelled, gelling or gellable composition into a horizontal section of a well at a location a distance δ
from a toe end of the well, the toe section,forming a gelled pill at the location, and pushing the gelled pill and accumulated liquids through the horizontal section of the well into the heal section of the well using gas pressure on a toe end side of the gelled pill. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 18)
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15. The method of claim , wherein the composition includes one or a plurality of metal ion formate salts of the formula (HCOO−
- )nMn+ and mixtures thereof, where M is a metal ion and n is the valency of the metal ion and wherein the metal ion is selected from the group consisting of an alkali metal ion, an alkaline metal ion, a transition metal ion, a lanthanide metal ion, and mixtures thereof.
- View Dependent Claims (16)
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19. A system for removing accumulated liquids from horizontal portions of a well comprising:
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an injection system capable of injecting a gelled, gelling or gellable composition into a horizontal portion of a well a distance δ
from a toe end of the well, the toe section,where the distance δ
from the toe end is sufficient for produced gas to push the gelled compositions from the toe section along a horizontal section to a heal section for uplift to the surface along with any accumulated liquids in the horizontal section. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification