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Method for increasing product recovery in fractures proximate fracture treated wellbores

a technology of proximate fracture and product recovery, which is applied in the direction of borehole/well accessories, survey, construction, etc., can solve the problems of not producing oil and gas from the entire length of the fracture, leaving behind an increasing portion of the desired reservoir product, etc., and achieves the effect of improving the fracture design process

Inactive Publication Date: 2014-05-29
CNOOC PETROLEUM NORTH AMERICA ULC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method and system for diagnosing and monitoring the location and path of fractures in a formation. This can help improve the design of fractures to increase the efficiency of hydrocarbon fluid recovery. The method involves stimulating a wellbore and introducing a marker or tracer into the wellbore to enter the fractures. The marker or tracer is captured by a non-stimulated wellbore and mapped to identify the location of the fracture. This information can be used to improve fracture design and reduce costs associated with hydrocarbon fluid recovery.

Problems solved by technology

If wellbores are drilled too far apart, an increasingly large portion of the desired reservoir product is left behind in the reservoir, and in particular the fracture.
It is well documented in the oil and gas industry that each hydraulic fracture, while intersecting reservoir rock at great distances from the wellbore; does not effectively produce oil and gas from the entire length of the fracture.

Method used

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  • Method for increasing product recovery in fractures proximate fracture treated wellbores
  • Method for increasing product recovery in fractures proximate fracture treated wellbores
  • Method for increasing product recovery in fractures proximate fracture treated wellbores

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Embodiment Construction

[0030]Other aspects and advantages of the invention will be apparent from the following description and the appended claims.

[0031]Referring now to FIG. 1, there is provided a typical fractured wellbore 23 resulting in a plurality of fractures 22 in the rock formation below the ground 19. An entry point 20 to the wellbore 23 above the ground level is provided. In one example, a first substantially horizontal wellbore 23 is drilled into a formation. The wellbore is cased and prepared as known to a person of ordinary skill in the art, for hydraulic fracturing. Referring now to FIG. 2, a second wellbore 24 is drilled proximate said first wellbore 23, particularly above said fractured wellbore 23. In this instance, the second wellbore 24 is not prepared in the typical manner for hydraulic fracturing. Rather the second wellbore 24 is considered passive in nature. The passive wellbore 24 may be lined in any manner in order to prevent collapse of said wellbore, preferable with a slotted lin...

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Abstract

A method of recovering product from a fracture below a surface, said method including:a. providing a first well that may be stimulated or has been stimulated at a first predetermined depth within a formation;b. stimulating said well resulting in at least one fracture in said formation; said fracture having at least one initiation point and at least one distal point; wherein said at least one initiation point is proximate said stimulated well and said at least one distal point is distant said stimulated well;c. providing at least one non-stimulated well, proximate said first well at a second predetermined depth in said formation and contacting said at least one distal point of said at least one fracture; said at least one non-stimulated well further including at least one access point to capture product from said at least one fracture in said formation;capturing said product from said fracture through said at least non-stimulated well, and recovering said captured product optionally at said surface.

Description

FIELD OF THE INVENTION[0001]The invention relates generally to the field of horizontal hydrocarbon exploration and development wells and field development methods. In particular, the invention relates to increasing product recovery, in particular hydrocarbon recovery from fractures proximate fractured wellbores, preferably hydraulic fractured wellbores, through subsurface rock formations. More specifically, the invention relates to a non-treated, preferably non-hydraulic fractured substantially deviated wellbore, wherein said non-treated substantially deviated wellbore is non-treated during product recovery, proximate a fracture treated, preferably a hydraulic fractured treated substantially deviated wellbore to allow for recovery of product, in particular hydrocarbons from fractures in said rock formations and methods for using same.BACKGROUND OF THE INVENTION[0002]Commercial extraction of reservoir product, such as oil and / or gas or combinations thereof, from certain subsurface ro...

Claims

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Application Information

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IPC IPC(8): E21B49/08
CPCE21B49/087E21B43/26E21B43/305E21B47/11
Inventor PYECROFT, JAMES FREDERICKBEARINGER, BRIAN DOUGLASVON LUNEN, ERIC
Owner CNOOC PETROLEUM NORTH AMERICA ULC
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