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Stimulation method

Inactive Publication Date: 2014-11-13
WELLTEC AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a stimulation system for oil production that allows for the reuse of the activation devices used in the process. Additionally, the invention includes a method for creating a pressure gradient to improve oil production. These technical effects provide more efficient and cost-effective oil production.

Problems solved by technology

Enhancement of hydrocarbon recovery by mechanical stimulation is difficult, time consuming and extremely expensive, especially since deep wells become increasingly widespread in the extraction of oil.

Method used

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Embodiment Construction

[0078]FIG. 1 shows an illustration of an oil field 101 seen from above, comprising two production wells 2, 2a, 2b and six injection wells 1, 1a, 1b, 1c, 1d, 1e, 1f. The invention relates to a stimulation system 100 comprising a plurality of wells and a plurality of activation devices 3 (shown in FIG. 2) arranged in the wells. The activation devices are arranged each in a well in the oil field 101, where each well may be an injection well 1 and / or a production well 2. Thus, the activation devices may all be arranged in production wells or may all be arranged in injection wells, or a combination thereof. In order to stimulate the oil production on a regular basis, the activation devices are activated with a frequency between 1 and 365 days and with an energy discharge of at least 0.1 kilograms TNT equivalence per activation. Thus, the activation period is 1-365 days before the activation device is activated again.

[0079]FIG. 2 shows a stimulation system 100 for stimulation of oil produ...

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Abstract

The present invention relates to a stimulation system for stimulation of oil production in an oil field. The stimulation system comprises a plurality wells, wherein a plurality of activation devices are arranged in the wells, and wherein the activation devices are activated with a frequency of once within a period of 1-365 days and with an energy discharge of at least 0.1 kilograms TNT equivalence per activation. Furthermore, the invention relates to a stimulation method.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a stimulation system for stimulation of oil production in an oil field. Furthermore, the invention relates to a stimulation method.BACKGROUND ART[0002]In the recovery of hydrocarbon-containing fluid, such as oil, from hydrocarbon-bearing reservoirs, it is usually possible to recover only a limited part of the oil in the reservoir by so-called primary recovery methods which utilise only the natural forces present in the reservoir. A variety of supplemental recovery techniques have been employed in order to increase the recovery of oil from subterranean reservoirs. The most widely used supplemental recovery technique is water-flooding which involves the injection of water into the reservoir from an injection well. As the water moves through the reservoir, it acts to displace or flush the oil therein towards a production well through which the oil is recovered. During recovery of hydrocarbon-containing fluid, reservoir pressu...

Claims

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Application Information

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IPC IPC(8): E21B28/00E21B43/25
CPCE21B28/00E21B43/25E21B43/003E21B43/263E21B43/281
Inventor HALLUNDB.AE BUTTED.K, JORGEN
Owner WELLTEC AS