Magma diluent

A drainage aid and name technology, applied in the field of enhanced oil recovery technology, can solve problems such as incompatibility of compound use, emulsion blockage, and single agent performance

Active Publication Date: 2007-11-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the steam huff and puff effect, various steam injection additives are used on site, such as drainage aids, viscosity reducers, high-temperature anti-demulsification, film expanders, etc., due to the singleness of the current chemical properties and the incompatibility of compound use, etc. , the chemicals used on site are far from meeting the actual needs of heavy oil thermal recovery
For example, heavy oil diluent, although it can dissolve asphalt and colloid, reduce the viscosity of heavy oil, but it has no effect on the damage caused by steam huffing and puffing; The damage caused by the process has no effect, but it is easy to cause emulsion blockage to the reservoir and cause clay swelling damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: Synthesis of 10m 3 thick oil thinner

[0013] Add 0.8 tons of lower fatty acid (m=5) to 1 ton of toluene, stir at 60r / min for 30 minutes, then mix with 1 ton of disodium edetate, 1 ton of chelating dispersant (m=10), 1.2 Tons of sulfonate drainage aids (n=12), add 10m 3 In the liquid mixing tank, stir at 60r / min for 60 minutes, make up the remaining liquid with water, and continue stirring for 180 minutes to synthesize 10m 3 Heavy oil thinner.

Embodiment 2

[0014] Embodiment 2: Synthesis of 10m 3 thick oil thinner

[0015] to 10m 3 Add 5m to the liquid distribution tank 3 Hot water (50°C), then add 1.2 tons of sulfonate drainage aid (n=12), stir at 60r / min for 30 minutes, then add 0.8 tons of lower fatty acids (m=5), continue stirring for 60 minutes , then add 1 ton of disodium edetate and 1 ton of chelating dispersant (m=10) in sequence, continue stirring for 60 minutes, make up the remaining liquid with water, and continue stirring for 90 minutes to synthesize 10m 3 Heavy oil thinner.

Embodiment 3

[0016] Embodiment 3: Synthesis of 10m 3 thick oil thinner

[0017] Add 0.8 tons of lower fatty acid (m=5) and 1.2 tons of sulfonate drainage aid (n=12) to 10m 3 In the liquid mixing tank, stir at 60r / min for 60 minutes, then add 5m 3 Hot water (50°C), continue stirring for 60 minutes, then add 1 ton of disodium edetate and 1 ton of chelating dispersant (m=10) in sequence, continue stirring for 90 minutes, make up the remaining liquid with water, and then add Continue stirring for 60 minutes to synthesize 10m 3 Heavy oil thinner.

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PUM

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Abstract

A condensed-oil diluting agent for improving steam throughout effect and recovery rate driven by auxiliary chemical steam in condensed-oil thermal extraction is prepared by analyzing partial transition metal element in crude-oil molecular structure chain for crude-oil viscosity influence, controlling object element content variation by physical chemical method and decreasing viscosity and flowing resistance. The condensed-oil diluting agent consists of complexone III, low-grade fatty acid, chelate dispersant and sulfosalt discharging aid. It can eliminate close-well block, inhibit clay expansion and improve stratum permeability, back-extraction speed and rate and restore oil-well production.

Description

Technical field: [0001] The invention belongs to the technical field of enhanced oil recovery technology for chemically assisted steam flooding to improve the effect of steam huff and puff in thermal recovery of heavy oil, in particular to apply a thinner to reduce the viscosity of heavy oil, reduce the flow resistance of crude oil, and convert the conversion and development mode of heavy oil. Background technique: [0002] The production of heavy oil in Liaohe Oilfield accounts for more than 70% of the total production. At present, the main method of heavy oil production in Liaohe Oilfield is steam huff and puff. The steam inhalation effect is getting worse and worse. In order to improve the steam huff and puff effect, various steam injection additives are used on site, such as drainage aids, viscosity reducers, high-temperature anti-demulsification, film expanders, etc., due to the singleness of the current chemical properties and the incompatibility of compound use, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/594
Inventor 张玉涛于燮佳陆鉴鲍永革何川张秋丽马昌明蹇晓云陈凌云边芳霞
Owner PETROCHINA CO LTD
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