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Method of reducing sand production from a wellbore

A wellbore and perforation technology, applied in the direction of wellbore/well components, drilling equipment and methods, earthwork drilling and production, etc., can solve problems such as clogging of holes, screens or sandstone filter layers, reduction of fluid products, etc.

Inactive Publication Date: 2006-12-13
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While such liners, screens, and sand filters are often successfully applied, there are potential defects such as clogging of the perforations, screens, or sand filters, resulting in reduced fluid production

Method used

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  • Method of reducing sand production from a wellbore
  • Method of reducing sand production from a wellbore
  • Method of reducing sand production from a wellbore

Examples

Experimental program
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Embodiment Construction

[0030] Figure 1A A wellbore 1 for producing hydrocarbon fluids is shown extending into a formation 2 comprising a formation zone 3 containing hydrocarbon fluids. The wellbore 1 is provided with a casing 4 extending from a wellhead 5 on the surface 6 to an upper end near the formation zone 3 . The casing 4 is fixed in the borehole by a cement layer 7 between the borehole wall and the casing 4 . A water injection string 8 for injecting cutting fluid extends into the wellbore 1 from a drilling rig 10 on the surface. The water injection string 8 is provided at its lower end with a fluid jet cutter 12 having a pair of nozzles 14 disposed opposite to each other. A fluid jet cutter 12 is located near the lower end of the formation zone 3 . A fluid jet 16 is sprayed from the nozzle 14 towards the wall of the borehole 1, thus creating a slot 16 oppositely arranged on the borehole wall.

[0031] Figure 1B Wellbore 1 is shown with water injection string 8 raised to a position where...

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PUM

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Abstract

A method is provided for the reduction of inflow of rock particles from an earth formation into a wellbore for the production of hydrocarbon fluid. The method comprises creating a zone of reduced compressive stiffness around the wellbore by removing rock material from the wall of the wellbore.

Description

technical field [0001] The present invention relates to a method of reducing the flow of rock particles from an earth formation into a wellbore used to produce hydrocarbon fluids. Reservoir rocks are generally loosely bound and thus tend to disintegrate and flow into the wellbore under the influence of hydrocarbon fluids flowing through the pores. Background technique [0002] This influx of rock particles is generally indicative of sand production, which is a frequent problem in the hydrocarbon fluid production industry because the sand particles produced tend to corrode production equipment such as piping systems and valves. Traditional methods of sand control include installing perforated support liners or screens that allow the passage of hydrocarbon fluids but exclude sand particles. A sand screen is also installed between the liner or screen and the borehole wall to control sand production. While such liners, screens, and sand filters are often used successfully, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/02E21B7/00E21B7/28E21B43/119E21B43/26
CPCE21B43/025E21B43/26E21B7/00E21B43/119E21B7/28
Inventor M·A·阿迪斯V·A·杜纳耶夫斯基D·F·费尔勒M·F·霍达维迪安C·A·李
Owner SHELL INT RES MAATSCHAPPIJ BV
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