CN103883296A - Oxygen removal method for diluting heavy oil by injecting hydrogen peroxide - Google Patents
Oxygen removal method for diluting heavy oil by injecting hydrogen peroxide Download PDFInfo
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- CN103883296A CN103883296A CN201310705828.2A CN201310705828A CN103883296A CN 103883296 A CN103883296 A CN 103883296A CN 201310705828 A CN201310705828 A CN 201310705828A CN 103883296 A CN103883296 A CN 103883296A
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- hydrogen peroxide
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Abstract
The invention relates to the technical field of oxygen removal methods, in particular to an oxygen removal method for diluting heavy oil by injecting hydrogen peroxide. The method includes: removing oxygen with kill fluid, injecting a casing with sodium thiosulfate, and injecting the casing with pure deoxidant to remove the oxygen. The method has the advantages that oxygen molecules overflowing in oxidization can be removed from a shaft and operation is facilitated.
Description
Technical field:
The present invention relates to deoxidation method technical field, be specifically related to a kind of deoxidation method that injects hydrogen peroxide dilution viscous crude.
Background technology:
The chemical formula of hydrogen peroxide is H
2o
2, also claim hydrogen peroxide, military project is defined as the harmless fuel of binary, civilian being defined as: weak acid strong oxidizer, concentration high for military project, content low for: dye cloth, papermaking, medical treatment etc.Application hydrogen peroxide need to possess necessary condition, can not contact with carbon molecule, and temperature is suitable, the hydrogen peroxide of 30% content is relatively stable in normal temperature, oxidizing condition is to contact with carbon molecule, and adds metal oxide, metal oxide to claim again " catalyzer ".
Oil is a kind of by the synthetic energy of multiple carbon component, it is to lean against under the pressure-acting on stratum automatically to flow to pit shaft just through manually rising to ground, viscous crude is higher because of colloid, asphalt content, in stratum, cannot automatically flow to pit shaft, people just adopt steam in stratum, to heat diluent stream to pit shaft artificial extraction again, but it has following shortcoming: one, extraction cost is high; Two, recovery ratio is low; Three, the steam generator blowdown on ground is serious.
Claim again to remain oxygen but any catalyzer all can produce oxygen molecule in the oxidation of hydrogen peroxide, have has less more, and oxidizing process has violent, also has gentlely, removes, otherwise easily blast but the residue oxygen of oxidation is essential.
Summary of the invention:
The object of this invention is to provide a kind of deoxidation method that injects hydrogen peroxide dilution viscous crude, the oxygen molecule that it can overflow oxidation is removed in pit shaft, and easy to operate.
In order to solve the existing problem of background technology, the present invention adopts following technical scheme: its deoxidation method is: adopt well killing fluid deoxygenation, and first by sodium thiosulfate sprue bushing, and then by pure oxygen scavenger sprue bushing.
The present invention has following beneficial effect: the oxygen molecule that oxidation can be overflowed is removed in pit shaft, and easy to operate.
Brief description of the drawings:
Fig. 1 is hydrogen peroxide injection pressure curve map in the present embodiment;
Fig. 2 is valve pit pressue-graph in the present embodiment;
Fig. 3 is open flow curve map in the present embodiment.
Detailed description of the invention:
This detailed description of the invention adopts following technical scheme: its deoxidation method is: adopt well killing fluid deoxygenation, and first by sodium thiosulfate sprue bushing, and then by pure oxygen scavenger sprue bushing.
Application of the hydrogen peroxide dilutes the favourable fraud that also has in viscous crude, its drawback is exactly to require high to variations in temperature, after oxidation, overflow and in gas, contain oxygen molecule, carbon in gas, oxygen runs into spark and easily blasts, any catalyzer has oxygen molecule to produce in the oxidation of hydrogen peroxide, just have and have less more, have violent, have gentle, so adopt three kinds of measures when application hydrogen peroxide: one, gentleness while selecting oxidation relatively, produce the few catalyzer of residue oxygen, two, overflow oxygen molecule deoxygenation in pit shaft for remaining oxidation, the sodium thiosulfate of pit shaft Lower Half that Here it is, the pure oxygen scavenger of the first half, three, again residue even ten thousand/ oxygen molecule in the process of circulation, not allow it produce some sparks or Mars yet.
Embodiment:
Application hydrogen peroxide carries out viscous crude dilution, injects 120 tons of some hydrogen peroxide, and three phases is divided in front and back:
1, the injection stage: adopt segmentation to beat crowded, inject and adopt two 400 type pump trucks, each period (containing well killing fluid) uninterruptedly clamp-ons five kinds of different medicaments, shares 8 hours 20 minutes.As shown in Figure 1.
2, the vexed well stage: vexed well 114 hours altogether, every 2 hour record pressure curve 1 time.Have converse curve with the full simulated experiment of vexed well, in full simulated experiment, by 2 metal pipe line simulate formation oxidizing process, because oxidizing process is a Lattice Oxygen heat release, heat build-up process, be subject to spatial limitation, the heat of generation and gas impel limited space pressure to rise.On-the-spot down-hole formation belongs to the loose heavy oil tested layer of 8m of covering layer and underlying bed folder, and heat and gas that oxidizing process produces spread to oil reservoir, as shown in Figure 2.
3, induced flow (open flow) stage: shorter this section time, mainly by the pressed gas in tubing string after oxidation and casing pressure air release out, but this stage belong to the Main Stage that this viscous crude of inspection dilutes.After 2004, the San Koujing being presided over by Dongying City Huanglong and the academician of the Chinese Academy of Sciences has two mouthfuls of wells to blast in this stage, and can the safety problem that solve this stage be to be related to hydrogen peroxide enter the key that viscous crude is produced.This one-phase shares 39 minutes, and the gas that discharges out, because the not concrete sampling condition in scene does not have sample analysis, can only be waited until the sampling of end opening well and analyze.As shown in Figure 3.
Implement viscous crude dilution by current application hydrogen peroxide, draw the following conclusions:
1, it is investigated state, the inside and outside data of readding, this is that in oil history, first successful Application hydrogen peroxide injects the practical well that heavy oil tested layer carries out viscous crude dilution, has confirmed that current petroleum industry is feasible to hydrogen peroxide dilution viscous crude in viscous crude development.
2, carry the oil sample that oil pipe takes out of from above and see, viscous crude has not only produced dilution owing to being heated, also because chemical functional is successfully converted into little molecule by large molecule.Show that from these two kinds of functions recovery ratio can increase substantially.
3, any include in practical scientific research project safety in production must be put go to first place research; Research and application on theoretical (paper), in producing, there is a big difference, without technique, theoretic detailed Exploration and Research, firmly can not use in actual applications.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a deoxidation method that injects hydrogen peroxide dilution viscous crude, is characterized in that its deoxidation method is: adopt well killing fluid deoxygenation, first by sodium thiosulfate sprue bushing, and then will in pure oxygen scavenger sprue bushing, carry out deoxygenation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310705828.2A CN103883296A (en) | 2013-12-20 | 2013-12-20 | Oxygen removal method for diluting heavy oil by injecting hydrogen peroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310705828.2A CN103883296A (en) | 2013-12-20 | 2013-12-20 | Oxygen removal method for diluting heavy oil by injecting hydrogen peroxide |
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| CN103883296A true CN103883296A (en) | 2014-06-25 |
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| CN201310705828.2A Pending CN103883296A (en) | 2013-12-20 | 2013-12-20 | Oxygen removal method for diluting heavy oil by injecting hydrogen peroxide |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867238A (en) * | 1988-05-18 | 1989-09-19 | Novatec Production Systems, Inc. | Recovery of viscous oil from geological reservoirs using hydrogen peroxide |
| US5038864A (en) * | 1990-05-10 | 1991-08-13 | Marathon Oil Company | Process for restoring the permeability of a subterranean formation |
| CN1456787A (en) * | 2003-06-18 | 2003-11-19 | 中国石油天然气股份有限公司 | Chemical thermal thickened oil recovery method |
| CN101737025A (en) * | 2008-11-20 | 2010-06-16 | 中国石油化工股份有限公司 | Method for reducing viscosity of crude oil |
| CN102162351A (en) * | 2011-03-15 | 2011-08-24 | 彭仁田 | Application of hydrogen peroxide to thickened oil dilution |
| CN102531227A (en) * | 2010-11-03 | 2012-07-04 | S.P.C.M.股份公司 | A process for treatment of produced water obtained from an enhanced oil recovery process using polymers |
-
2013
- 2013-12-20 CN CN201310705828.2A patent/CN103883296A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867238A (en) * | 1988-05-18 | 1989-09-19 | Novatec Production Systems, Inc. | Recovery of viscous oil from geological reservoirs using hydrogen peroxide |
| US5038864A (en) * | 1990-05-10 | 1991-08-13 | Marathon Oil Company | Process for restoring the permeability of a subterranean formation |
| CN1456787A (en) * | 2003-06-18 | 2003-11-19 | 中国石油天然气股份有限公司 | Chemical thermal thickened oil recovery method |
| CN101737025A (en) * | 2008-11-20 | 2010-06-16 | 中国石油化工股份有限公司 | Method for reducing viscosity of crude oil |
| CN102531227A (en) * | 2010-11-03 | 2012-07-04 | S.P.C.M.股份公司 | A process for treatment of produced water obtained from an enhanced oil recovery process using polymers |
| CN102162351A (en) * | 2011-03-15 | 2011-08-24 | 彭仁田 | Application of hydrogen peroxide to thickened oil dilution |
Non-Patent Citations (3)
| Title |
|---|
| 《化工百科全书》编辑委员会: "《化工百科全书》", 30 September 1998, 化学工业出版社 * |
| 潘斌林: "草桥稠油热-氧化降黏规律", 《承德石油高等专科学校学报》 * |
| 魏善全等: "利用H2O2开采稠油工艺技术", 《特种油气藏》 * |
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Application publication date: 20140625 |
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