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Method of plugging and pressure testing a well

A technology for drilling and plugging materials, which can be used in surveying, earth-moving drilling, sealing/packing, etc.

Active Publication Date: 2019-08-23
EQUINOR ENERGY AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, accurately determining the quality of well plugging can be difficult, so regulations often overly specify plugging requirements by some significant margin

Method used

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  • Method of plugging and pressure testing a well
  • Method of plugging and pressure testing a well
  • Method of plugging and pressure testing a well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] refer to Figure 1a-1c , drilling a wellbore 100 comprising a surrounding formation 102 . A casing (tubular) 104 and a cement layer 106 between the casing and the formation are located within the wellbore. A liner, or other tubular, can be removed from the casing in advance, at least over the interval to be plugged. Alternatively, such a liner or other tubing may remain within the casing and eventually become embedded within the plug.

[0037] Open the casing in the drilling interval to be plugged by any feasible method. For example, in Figure 1a-1c , a shorter section of casing is radially opened by using perforating charges 108 . A method using such a charge is described in WO 2014 / 117846 A1. The charge is detonated for 110 ( Figure 1b ), which results in a plurality of cutouts 112 within the casing around substantially the entire circumference of the casing ( Figure 1c ), thereby exposing the surrounding formation and cement. Between each incision, the cannu...

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PUM

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Abstract

A method of plugging a well extending into a formation to facilitate temporary or permanent abandonment of the well is provided. The method comprises conveying a plug placement and verification tool (PPVT) through the well, to a plug formation location, the PPVT comprising a stinger for delivering a plugging material into the well, an expandable packer disposed at one end of the stinger and a pressure sensor disposed below the expandable packer, and operating the expandable packer to form a seal in the well above the pressure sensor. The method further comprises delivering a plugging materialfrom the stinger into a region of the well above the expandable packer, thereby forming a plug in the well, and thereafter creating a pressure change above the plug and verifying the integrity of theplug using the pressure sensor.

Description

technical field [0001] The present invention relates to a method of plugging a well that extends into a hydrocarbon containing formation. The invention also relates to a method of pressure testing a plugged well. The invention also provides a device for plugging and pressure testing the well. Background technique [0002] Oil and gas wells are usually drilled for three distinct purposes: as producers of hydrocarbons; as injectors of water or gas for reservoir pressure support or for deposition purposes; or as exploratory drilling. In some cases, it may be necessary to perfectly plug and seal these wells, for example, after the well has reached the end of its life and it is not economically feasible to keep the well in use (so-called "plug and abandon") or after the For some temporary purposes (such as "slot recovery"). Performing well plugging is associated with permanently abandoning a well due to field decommissioning, or with the construction of a new wellbore for a ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B33/12E21B33/128E21B33/14
CPCE21B29/02E21B33/126E21B33/13E21B43/116E21B47/06E21B47/117E21B33/12E21B33/128E21B33/14
Inventor G·格里姆斯波P·V·赫明森H·薛霍尔特G·谢恩
Owner EQUINOR ENERGY AS