Temporary plugging and energizing treatment method for heavy oil steam-stimulated wells

A processing method and steam technology, which are applied in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of high cost, single effect and large amount of consumption, and achieve low cost, simple construction and strong pertinence. Effect

Active Publication Date: 2014-02-19
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The oil well temporary plugging agent used in the above-mentioned prior art is especially used in the temporary plugging agent at the end of steam huff and puff of heavy oil well, which generally has problems such as large dosage, single effect, and high cost

Method used

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  • Temporary plugging and energizing treatment method for heavy oil steam-stimulated wells
  • Temporary plugging and energizing treatment method for heavy oil steam-stimulated wells
  • Temporary plugging and energizing treatment method for heavy oil steam-stimulated wells

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Embodiment 1

[0059] First, see figure 1 Shown is a downhole feeder for transporting solid temporary plugging material 10 used in the method of the present invention. The downhole feeder mainly includes a pipe body 20 (in this embodiment, a standard 4-inch oil pipe with a length of 1-3m), the pipe body is a space for accommodating the solid temporary plugging material 10, and the upper end of the pipe body is provided with a female buckle Hoop 201, a male buckle 202 is arranged at the lower end of the pipe body, and a limit steel ring 203 for load bearing is welded inside the pipe body near the male buckle 202. The height of the limit steel ring (longitudinal in the figure) is about 10mm, and the thickness 2 ~ 3mm.

[0060] The solid temporary plugging material 10 in this embodiment, its structure see figure 2 As shown, it mainly includes a cylindrical body (body 101 of solid temporary plugging material) formed by stacking a plurality of resin balls 1011, and a through hole ( The throug...

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Abstract

The invention provides a temporary plugging and energizing treatment method for heavy oil steam-stimulated wells. The method includes: delivering solid temporary material, which is made by well mixing resin spheres and ammonium bicarbonate and pressing, to the position 1-2m below an oil layer; squeezing mud acid prepared with 7-12% hydrochloric acid and 3-6% hydrofluoric acid into an insulation tube; after squeezing, stoping a pump for 0.5-1 hour; starting the pump to squeeze displacement liquid or energizing chemical aid; directly performing steam injection. The temporary plugging and energizing treatment method for heavy oil steam-stimulated wells is highly purposeful, construction is simple, multiple effects are integrated, the cost is low, and energizing effect is significant.

Description

technical field [0001] The invention relates to a temporary plugging acidification oil increasing technology adopted for increasing oil in the later stage of heavy oil huff and puff development, in particular to a treatment method for temporary plugging and energy enhancement of heavy oil steam huff and puff wells, which belongs to the technical field of heavy oil development. Background technique [0002] In the late stage of huff and puff development of heavy oil reservoirs, there are generally more low-efficiency wells and significantly worse economic benefits; steam repeatedly huffs and puffs in oil layers with good permeability, and some oil layers cannot be effectively produced; low formation pressure often leads to Do not wait for contradictions. At present, although many literature reports have proposed solutions from different angles, they all have their own limitations due to various reasons such as cost, technology, and safety. [0003] In the prior art, there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/27E21B43/24
Inventor 高玉军岳玉全马春宝王德伟潘恩林胡贺元杨晓莉王庆红李军辉段效威刘广友曲玉忠陈素娟朱利军张义萍
Owner PETROCHINA CO LTD
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