US20100314171A1 - Method of excavation of oil and gas-producting wells - Google Patents

Method of excavation of oil and gas-producting wells Download PDF

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Publication number
US20100314171A1
US20100314171A1 US12/456,257 US45625709A US2010314171A1 US 20100314171 A1 US20100314171 A1 US 20100314171A1 US 45625709 A US45625709 A US 45625709A US 2010314171 A1 US2010314171 A1 US 2010314171A1
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Prior art keywords
cracks
slot
oil
gas
layers
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US12/456,257
Inventor
David Yerusalimsky
Yakov Basin
Vilen S. Neiman
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Individual
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Individual
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Priority to US12/456,257 priority Critical patent/US20100314171A1/en
Publication of US20100314171A1 publication Critical patent/US20100314171A1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/119—Details, e.g. for locating perforating place or direction

Definitions

  • the present invention relates to the oil and gas industry, and more particularly to methods of openings of oil- and gas-productive layers in wells.
  • a method of increasing efficiency of opening of oil- and gas-productive layers in a well with a casing which utilizes a technology of sand-jet slotting for opening of the layers.
  • This method can increase oil and gas recovery from 1.5 to 10 times as compared with a known method of opening of oil- and gas-containing layers with the use of a cumulative perforation.
  • the sand-jet slotting is performed by directing of a cutting jet arbitrarily. It is believed that the existing sand-jet slotting can be further improved to increase its efficiency.
  • one feature of the present invention resides, briefly stated, in a method of opening in a well of oil or gas productive layers having a plurality of cracks extending in a predetermined direction, comprising the steps of forming in a layer a slot which intersects cracks, and orienting the slot so that it extends substantially perpendicular to the direction of the cracks so that the direction of the cracks and the direction of the slot are oriented in a cross-shaped manner.
  • said forming a slot includes orienting a slot azimuthally and at the same time substantially perpendicularly to the direction of extension of the cracks.
  • Still another feature of the present invention resides, briefly stated, in that said forming a slot includes forming a slot extending through a plurality of cracks extending in the predetermined direction substantially azimuthally.
  • FIG. 1 is a plan view of the layer having a plurality of cracks and subjected to opening by slotting in accordance with the present invention.
  • a method in accordance with the present invention is performed for opening of layers 1 through which a well 2 extends substantially in a vertical direction.
  • the opening of the layers is performed to provide a flow of fluid, such as oil or gas from the layers 1 into the well 2 to be subsequently taken from the well.
  • the layers 1 have a plurality of cracks which are identified with reference numerals 3 , as shown in FIG. 1 .
  • FIGURE shows a plan view of one of the layers in which cracks are formed. In the layers the cracks extend in a direction identified with the arrow A, and extending for example between East and West.
  • the opening of the layers is performed by cutting of slots, for example by means of the above mentioned sand-jet perforator 2 .
  • a slot is produced, for example as identified with reference numeral 21 .
  • the slot 21 is oriented in a predetermined direction.
  • the slot 21 extends in a direction B which is substantially perpendicular to the direction A of extension of the cracks. Therefore, the direction of the slot 21 and the direction of the cracks 3 form a so-called cross, since they are mutually perpendicular.
  • the slotting performed in accordance with the present invention provides intersecting of a greater number of cracks and therefore flowing of a greater quantity of oil or gas from the slots into the well.

Abstract

A method of opening in a well of oil or gas containing layers having a plurality of cracks extending in a predetermined direction, includes forming in a layer a slot intersecting cracks, and orienting the slot so that it extends substantially perpendicular to the direction of the cracks so that the direction of the cracks and the direction of the slot are oriented in a cross-shaped manner.

Description

    BACKGROUND OF THE INVENTION
  • The present invention relates to the oil and gas industry, and more particularly to methods of openings of oil- and gas-productive layers in wells.
  • A method of increasing efficiency of opening of oil- and gas-productive layers in a well with a casing is known, which utilizes a technology of sand-jet slotting for opening of the layers. This method can increase oil and gas recovery from 1.5 to 10 times as compared with a known method of opening of oil- and gas-containing layers with the use of a cumulative perforation. Conventionally the sand-jet slotting is performed by directing of a cutting jet arbitrarily. It is believed that the existing sand-jet slotting can be further improved to increase its efficiency.
    • SUMMARY OF THE INVENTION
  • Accordingly, it is an object of the present invention to provide new method of opening of oil- and gas-productive layers, which is a further improvement of the existing methods.
  • In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a method of opening in a well of oil or gas productive layers having a plurality of cracks extending in a predetermined direction, comprising the steps of forming in a layer a slot which intersects cracks, and orienting the slot so that it extends substantially perpendicular to the direction of the cracks so that the direction of the cracks and the direction of the slot are oriented in a cross-shaped manner.
  • Another feature of the present invention resides, briefly stated, in that said forming a slot includes orienting a slot azimuthally and at the same time substantially perpendicularly to the direction of extension of the cracks.
  • Still another feature of the present invention resides, briefly stated, in that said forming a slot includes forming a slot extending through a plurality of cracks extending in the predetermined direction substantially azimuthally.
  • The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a plan view of the layer having a plurality of cracks and subjected to opening by slotting in accordance with the present invention.
    •  DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • A method in accordance with the present invention is performed for opening of layers 1 through which a well 2 extends substantially in a vertical direction.
  • The opening of the layers is performed to provide a flow of fluid, such as oil or gas from the layers 1 into the well 2 to be subsequently taken from the well. The layers 1 have a plurality of cracks which are identified with reference numerals 3, as shown in FIG. 1.
  • The opening of the layers is performed by perforating of the layers by means, for example, of sand-jet perforation which is known in the art. FIGURE shows a plan view of one of the layers in which cracks are formed. In the layers the cracks extend in a direction identified with the arrow A, and extending for example between East and West.
  • In order to provide flowing of oil or gas from the layers 1 into the well 2, the opening of the layers is performed by cutting of slots, for example by means of the above mentioned sand-jet perforator 2.
  • In accordance with the present invention a slot is produced, for example as identified with reference numeral 21. The slot 21 is oriented in a predetermined direction. In particular, the slot 21 extends in a direction B which is substantially perpendicular to the direction A of extension of the cracks. Therefore, the direction of the slot 21 and the direction of the cracks 3 form a so-called cross, since they are mutually perpendicular.
  • When the opening of the layer by cutting a slot is performed in the inventive manner, the efficiency of flow of the oil or gas from the cracks 11-17 in the layers 2 into the well 1 is increased, since in this manner the slot extends through a greater number of the cracks.
  • Therefore the slotting performed in accordance with the present invention provides intersecting of a greater number of cracks and therefore flowing of a greater quantity of oil or gas from the slots into the well.
  • It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the type described above.
  • While the invention has been illustrated and described as embodied in a method of opening of oil and gas productive layers, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
  • Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.

Claims (3)

1. A method of opening in a well of oil or gas containing layers having a plurality of cracks extending in a predetermined direction, comprising the steps of forming in a layer a slot which intersects cracks; and orienting the slot so that it extends substantially perpendicular to the direction of the cracks so that the direction of the cracks and the direction of the slot are oriented in a cross-shaped manner.
2. A method as defined in claim 1, wherein said step of forming a slot includes orienting a slot azimuthally and at the same time substantially perpendicularly to the direction of extension of the cracks.
3. A method as defined in claim 1, wherein said step of forming a slot includes forming a slot extending through a plurality of cracks extending in the predetermined direction substantially azimuthally.
US12/456,257 2009-06-15 2009-06-15 Method of excavation of oil and gas-producting wells Abandoned US20100314171A1 (en)

Priority Applications (1)

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US12/456,257 US20100314171A1 (en) 2009-06-15 2009-06-15 Method of excavation of oil and gas-producting wells

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US12/456,257 US20100314171A1 (en) 2009-06-15 2009-06-15 Method of excavation of oil and gas-producting wells

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180016884A1 (en) * 2016-07-12 2018-01-18 Leon Marmorshteyn Method of increasing productivity of oil and gas recovery from previously used wells

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237706A (en) * 1964-01-08 1966-03-01 Dresser Ind Well perforator
US3419070A (en) * 1965-12-23 1968-12-31 Dow Chemical Co Selective perforation and directional fracturing
US3587744A (en) * 1969-07-07 1971-06-28 Western Co Of North America Fracturing of subsurface formations
US4687059A (en) * 1986-03-21 1987-08-18 Atlantic Richfield Company Enhanced hydrocarbon recovery process utilizing thermoelastic fracturing
US4834181A (en) * 1987-12-29 1989-05-30 Mobil Oil Corporation Creation of multi-azimuth permeable hydraulic fractures
US20040177960A1 (en) * 2003-01-28 2004-09-16 Chan Keng Seng Propped Fracture with High Effective Surface Area
US20070272407A1 (en) * 2006-05-25 2007-11-29 Halliburton Energy Services, Inc. Method and system for development of naturally fractured formations

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237706A (en) * 1964-01-08 1966-03-01 Dresser Ind Well perforator
US3419070A (en) * 1965-12-23 1968-12-31 Dow Chemical Co Selective perforation and directional fracturing
US3587744A (en) * 1969-07-07 1971-06-28 Western Co Of North America Fracturing of subsurface formations
US4687059A (en) * 1986-03-21 1987-08-18 Atlantic Richfield Company Enhanced hydrocarbon recovery process utilizing thermoelastic fracturing
US4834181A (en) * 1987-12-29 1989-05-30 Mobil Oil Corporation Creation of multi-azimuth permeable hydraulic fractures
US20040177960A1 (en) * 2003-01-28 2004-09-16 Chan Keng Seng Propped Fracture with High Effective Surface Area
US20070272407A1 (en) * 2006-05-25 2007-11-29 Halliburton Energy Services, Inc. Method and system for development of naturally fractured formations

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180016884A1 (en) * 2016-07-12 2018-01-18 Leon Marmorshteyn Method of increasing productivity of oil and gas recovery from previously used wells
US9903191B2 (en) * 2016-07-12 2018-02-27 Leon Marmorshteyn Method of increasing productivity of oil and gas recovery from previously used wells
US10208579B2 (en) 2016-07-12 2019-02-19 Leon Marmorshteyn Method of increasing productivity of oil and gas recovery from previously used wells

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