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Plugging technology of high infiltration layer

A kind of process and water layer technology, applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problems of failure to restore production capacity, high price, high cost, etc., and achieve good unidirectionality and Sealing performance, damage prevention, high strength effect

Inactive Publication Date: 2004-11-24
金军
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although this method can block the edge and bottom water, it also blocks the channel for thermal recovery and steam injection, which fails to achieve the purpose of restoring production capacity.
In addition, the high cost and high price of ultra-fine oil well cement are often prohibitive
In addition, there are also gel-type chemical water shutoff agents, but it often partially enters the non-target oil production layer, causing it to be damaged.

Method used

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  • Plugging technology of high infiltration layer
  • Plugging technology of high infiltration layer
  • Plugging technology of high infiltration layer

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Embodiment Construction

[0011] The present invention will be further described in detail through specific embodiments below.

[0012] as illustrated, figure 1 The shown embodiment one includes a plugging layer composed of two plugging materials, wherein A is a dispersion fluid prepared from waste drilling polymer mud and adding 0.1% lignosulfonate as a mud diluent-1 , B is the dispersant fluid-2 prepared from oilfield waste oil sludge accounting for about 39% of the total weight, 60% of sewage and 1% of OP-type surfactant as a dispersant, and the two plugging materials are injected sequentially, After the construction is completed, the boring well can enter the steam chemical injection process within 5-7 days. 1 in the figure is the edge water of the formation.

[0013] Depend on figure 2 The shown embodiment two except that A is the dispersion fluid-1 prepared by waste drilling polymer mud and adding lignosulfonate accounting for 3% of polymer mud weight as mud diluent, and B is the total weight...

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Abstract

The blocking-off process for high water seepage layer includes injecting dispersion fluid-I into stratum, injecting dispersion fluid-II, keeping well in close state for 5-7 days and injecting steam chemically. The dispersion fluid-I is compounded with waste well drilling polymer sludge and lignosulfonate in 0.1-5 wt% as sludge diluent. The dispersion fluid-II is compounded with waste oil field sludge in 30-50 wt%, waste water in 49-69 wt% and OP-type surfactant as dispersant in 0.3-1 wt%. The present invention can block active side and bottom water in oil deposit area effectively in monoway without blocking hot exploitation steam injecting channel. The present invention has relatively low cost, and is suitable for exploit dense oil thermally.

Description

technical field [0001] What the present invention proposes to protect is a brand-new plugging process of high-permeability water layer, which is mainly applied to the plugging of active edge and bottom water in ultra-heavy oil blocks of petroleum oil fields. Background technique [0002] Heavy oil reservoirs generally have relatively active edge and bottom water. After thermal recovery, as the reservoir pressure continues to drop, edge and bottom water will continue to invade and submerge effective development layers. This results in a large number of oil wells being flooded with water prematurely. The water cut of the oil well increases, causing the production capacity of the oil well to decrease, and the production decline is exacerbated. The main reasons for the rapid water breakthrough and rapid rise of water cut in oil wells are that during the process of thermal recovery and enhanced oil recovery, the oil layer pressure drops rapidly, the pressure difference is large,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
Inventor 金军
Owner 金军
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