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High-temperature high-pressure artifical sandproof well wall and construction technology thereof

A technology of high temperature and high pressure, construction technology, applied in wellbore/well components, production fluid, earthwork drilling and other directions, can solve the problems of reducing permeability, less sand production, damage to oil layers, etc., to ensure normal production, high permeability Sexual, easy-to-implement effects

Inactive Publication Date: 2004-02-04
LIAONING TIANYI IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the various technological measures and sand control devices used in the field have their own shortcomings. The mechanical sand control technology and devices usually used are only suitable for wells with less serious sand production and the sand particle size is greater than 0.1mm. It may damage the oil layer and reduce the permeability. As for the artificial well wall sand control technology adopted in some oilfields in recent years, it is mainly applicable to conventional sand production wells, and it cannot fully meet the production requirements of heavy oil wells working under high temperature and high pressure conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 600kg hydroxypropyl guar gum (5‰), 240kg clay stabilizer (A-25) (2‰), 240kg extrusion aid (D-50) (2‰), 240kg defoamer (XP-186 ) (2‰), 120kg fungicide (S-100) (1‰), 80kg caustic soda (2‰), 69kg crosslinking agent (borax or organoboron) (2.3%), 78kg breaker (over Ammonium sulfate) (accounting for 2.6%), 12kg of low temperature breaker (accounting for 1-2‰) plus 120m 3 Prepare working fluid with water, use quartz sand 6m 3 , high temperature sand control material 8m 3 Carry out high-temperature artificial sand control well wall construction for a heavy oil well according to the above construction procedures.

Embodiment 2

[0025] Add 600kg of EC heavy oil displacement agent (accounting for 5‰), 480kg of clay stabilizer (KCL) (accounting for 4%), 240kg of drainage aid (D-50) (accounting for 2‰) with water for 120m 3 Prepare working fluid, use quartz sand 6m 3 , high temperature sand control material 8m 3 Carry, construct a heavy oil well according to the above construction procedure.

Embodiment 3

[0027] Add 90m of water with 450kg of EC heavy oil displacement agent (accounting for 5‰), 360 kg of clay stabilizer (KCL) (accounting for 4%), 180kg of displacement aid (D-50) (accounting for 2‰) 3 The prepared working solution, the 8m 3 The high-temperature sand control material is carried into the well, and the preliminary sand control work is carried out on a certain heavy oil well according to the above construction procedures.

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Abstract

A high-temp high-pressure artificial sand-controlling well wash for the oil well to recover thick oil by injecting steam is formed through pressure cracking of underground target stratus, high-pressure injecting of working liquid to form cracked seams in the stratum, carrying the quartz sand and refractory sand-controlling material into the seams by carrying liquid, closing the well and hydrating reacting to form a whole stratum.

Description

Technical field: [0001] The invention relates to a downhole facility for sand control in heavy oil steam injection thermal recovery wells and a construction technique thereof, which belongs to the category of heavy oil recovery technology. Background technique: [0002] In the steam injection thermal recovery of heavy oil, sand production is one of the main factors affecting and restricting the normal production of heavy oil wells and the development speed of reservoirs. In addition to internal factors such as poor cementation degree of the reservoir itself and loose lithology, high-intensity frequent steam injection causes formation cement to be destroyed, and fluid entering the well during operation causes formation clay hydration expansion and viscous oil flow to accelerate In addition to this damage, the framework of the oil layer is destroyed, resulting in increasingly serious sand production in oil wells. At present, the various technological measures and sand control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B43/24
Inventor 王彬刘春阳李明张践刘成江
Owner LIAONING TIANYI IND CO LTD
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