Chemical additives for temporary plugging and energy enhancement of heavy oil steam huff and puff wells and their preparation methods and applications

A technology of chemical additives and steam, applied in chemical instruments and methods, earthwork drilling, wellbore/well parts, etc., can solve the problems of high cost, large amount of consumption, single effect, etc., and achieve simple construction and high effective utilization rate , The effect of long foam half-life

Active Publication Date: 2016-05-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Chemical additives for temporary plugging and energy enhancement of heavy oil steam huff and puff wells and their preparation methods and applications
  • Chemical additives for temporary plugging and energy enhancement of heavy oil steam huff and puff wells and their preparation methods and applications
  • Chemical additives for temporary plugging and energy enhancement of heavy oil steam huff and puff wells and their preparation methods and applications

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Embodiment 1

[0055] 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.

[0056] 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 chemical assistant for temporary blocking treatment and energy increment of a thickened oil steam huff-puff well as well as a preparation method and an application of the chemical assistant. Weighted on the basis of the total weight of the chemical assistant, the chemical assistant is prepared from the following raw materials: 0.2-0.8% of sodium p-perfluorononenyloxy benzene sulfonate, 2-8% of alcohol, 0.2-0.8% of silicon resin polyether emulsion, 15-20% of ammonium carbonate and the balance of water. When being used for the temporary blocking treatment of the thickened oil steam huff-puff well, the chemical assistant provided by the invention is injected after an acidification operation and before a steam injection operation, so that the chemical assistant has the technical effects such as strong pertinency, simple construction, multiple effect integration, low cost, remarkable energy increment and the like.

Description

technical field [0001] The present invention relates to a temporary plugging and acidification technology for increasing oil in the later stage of heavy oil huff and puff development, and specifically relates to a chemical additive for temporary plugging of heavy oil steam huff and puff wells and its preparation method and application. It 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508E21B33/13
CPCC09K8/5045C09K8/506C09K8/5086E21B33/13
Inventor 高玉军
Owner PETROCHINA CO LTD
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