High-temperature resistant steam chemical auxiliary agent for thermal oil recovery

A technology of steam chemical and thermal oil recovery, which is applied in chemical instruments and methods, production fluids, earth drilling and production, etc., to achieve the effects of improving steam flow, reducing oil production costs, and simple and cheap raw materials

Active Publication Date: 2015-04-22
DONGYING HUALI PETROLEUM TECH
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

In the prior art, no new type of heavy oil thermal recovery additive with strong adaptability and wide range of functions has been researched and developed to meet industrial requirements

Method used

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  • High-temperature resistant steam chemical auxiliary agent for thermal oil recovery

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Embodiment 1

[0024] Formulate 75% poly fatty acid amidopropyl dimethyl tertiary amine + 25% isobutanol into an auxiliary thermal oil displacement steam chemical additive, and configure this auxiliary thermal oil displacement steam chemical additive into a 0.1% microemulsion agent, According to the enterprise standard Q / SH 10201258-2005 of Shengli Petroleum Administration Bureau of Sinopec Group, the simulated steam flooding experiment was carried out. The steam temperature was 250°C, and the size of the sand filling model was Φ50×1000mm. The Shengli heavy oil used in the experiment was dehydrated and degassed at 50°C. The viscosity is 17314mpa.s, and the model permeability is 2.35dc. During the experiment, use a high-pressure metering pump to inject water into the damper system at a flow rate of 5mL / min, start the steam generation system, and make the steam at the outlet of the steam generator reach the following indicators: temperature 250°C, dryness 20%, pressure 4.1Mpa. The electric val...

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Abstract

The invention provides a novel high-temperature resistant steam chemical auxiliary agent for thermal oil recovery. The novel high-temperature resistant steam chemical auxiliary agent comprises 65-85% a high-temperature resistant poly fatty acid acylamino alkyl dimethyl tertiary amine non-ionic surface active agent and 15-35%a mutual solvent in terms of percentage by weight. The technical bottleneck that the chemical oil displacing agent in the prior art cannot be used at high temperature is overcome; the steam chemical auxiliary agent disclosed by the invention can have high stability and oil displacing performance in the steam atmosphere being up to 350 DEG C; therefore, chemical displacement and steam displacement are combined perfectly and organically; the oil recovery cost is favorably reduced; and the thermal oil displacing recovery rate is increased.

Description

technical field [0001] The invention relates to a steam chemical additive used in the petroleum industry to assist steam stimulation and steam flooding oil recovery, in particular to a chemical additive accompanied by steam injection during the steam injection formation process. technical background [0002] With the continuous extraction of oil, the world's oil reserves, especially conventional crude oil that is easy to extract and refine, are constantly decreasing. However, people still have a great demand for oil. Therefore, heavy oil, as a kind of unconventional oil resource, has become more and more popular among researchers. attention. The main mining methods used today include thinning viscosity reduction, heating viscosity reduction, emulsification viscosity reduction and polymer viscosity reduction. Among them, steam huff and puff and steam flooding are currently the most widely used recovery methods for heavy oil production in the world. These two methods are used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/592C09K8/584E21B43/24
Inventor 沙勇刘英军
Owner DONGYING HUALI PETROLEUM TECH
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