[특허]Compositions and methods for reducing the permeability of underground strata

[미국특허] Compositions and methods for reducing the permeability of underground strata 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-043/22 E02B-003/12
출원번호	US-0038602 (1987-04-15)
우선권정보	CA-0462127 (1984-08-30)
발명자 / 주소	Navratil Martin (West Hill CAX) Mitchell Mark S. (London CAX) Sovak Mojmir (Toronto CAX)
출원인 / 주소	The Borden Company Limited (West Hill CAX 03)
인용정보	피인용 횟수 : 3 인용 특허 : 12

초록 ▼

Compositions and methods are used for reducing the permeability of high fluid permeability segments of underground strata, the compositions being injected into the high permeability segments in liquid form and there gelled to reduce the permeability of the segments. A first group of compositions has a pH of at least 4 and comprises a sulfited derivative of a tannin extract together with furfural, formaldehyde or a formaldehyde derivative. The second group of compositions comprises furfural and a gellable vegetable material which can be a tannin extract, a sulfited derivative of a tannin extract, a catechin, an alkaline extract of a coniferous bark or a lignin or sulfonated lignin derivative.

대표청구항 ▼

A method for decreasing the fluid permeability of a segment of a formation containing an oil-bearing stratum, said segment having greater fluid permeability than the surrounding segments of said formation, which method comprises: injecting into said formation via a well penetrating said formation an aqueous gelable solution having a pH of at least about 4, said solution consisting essentially of a sulfonate derivative of a tannin extract and an aldehyde component selected from the group consisting of furfural, urea-formaldehyde concentrate, hexamethylenetetramine, paraformaldehyde, formaldehyde in aqueous solution and a phenol-formaldehyde resole resin, the weight of said sulfonate derivative to said aldehyde component is from about 1.5:1 to about 7.5:1 based on the aldehyde in said sulfonate derivative, the total weight of said sulfonate derivative and aldehyde component being from about 1 to about 30 percent by weight of said solution; the viscosity of said solution is between 1 and 30 mPaㆍs. when first formed; the gelling time of said solution and the rate of injection thereof being such that said solution passes down said well by which it is injected and achieves substantial penetration into said higher fluid permeability segment before substantial gelling of said solution occurs; and allowing said solution to gel within said higher fluid permeability segment and thereby reduce the fluid permeability of said segment.

이 특허에 인용된 특허 (12) 인용/피인용 타임라인 분석

Navratil Martin (Scarborough CAX) Mitchell Mark S. (Scarborough CAX) Sovak Mojmir (Toronto CAX), Compositions and methods for reducing the permeability of underground strata.
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Clampitt Richard L. (Bartlesville OK), Foamable compositions and formations treatment.
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Swanson Billy L. (Bartlesville OK), Gelled compositions and well treating.
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Kozlowski ; Eugene C. ; Stout ; Charles A., Method of treating oil wells.
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Felber ; Betty J. ; Dauben ; Dwight L. ; Marrs ; Richard E., Method using lignosulfonates for high-temperature plugging.
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Pilny Richard J. (Midland MI), Rendering porous structures impermeable by treatment with gellable amine polymers.
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Pilny Richard J. (Midland MI) Regulski Thomas W. (Midland MI), Rendering porous structures impermeable by treatment with pH insensitive gelable compositions of amide polymers.
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Pilny Richard J. (Midland MI) Regulski Thomas W. (Midland MI), Rendering porous structures impermeable by treatment with pH insensitive gelable compositions of amide polymers and comp.
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Swanson Billy L. (Bartlesville OK), Shear-thickening compositions.
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Lawrence Dan D. (Tulsa OK) Felber Betty J. (Tulsa OK), Silicate activated lignosulfonate gel treatments of conductive zones.
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Swanson ; Billy L., Stabilized aqueous gels and uses thereof.
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Kalfoglou George (Houston TX), Sulfomethylated lignosulfonates as additives in oil recovery processes involving chemical recovery agents.
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이 특허를 인용한 특허 (3) 인용/피인용 타임라인 분석

Chen Jen-Chi ; Chen Fu ; Walterick ; Jr. Gerald C., Composition and method for water clarification.
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Chen Jen-Chi (Morrisville PA) Chen Fu (Newtown PA) Walterick ; Jr. Gerald C. (Levittown PA), Composition comprising a tannin-containing copolymer.
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Eldon D. Dalrymple ; Larry S. Eoff ; Baireddy R. Reddy ; David L. Brown ; Paul S. Brown, Methods of reducing the water permeability of subterranean formations.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Compositions and methods for reducing the permeability of underground strata 원문보기