CN103075132A - Echelon releasing method for underground solid anticorrosion and antiscale agents - Google Patents
Echelon releasing method for underground solid anticorrosion and antiscale agents Download PDFInfo
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Abstract
The invention provides an echelon releasing method for underground solid anticorrosion and antiscale agents, and the method comprises the following steps of step 1: charging imidazoline inhibitor with a dissolving speed of 0.12g/cm<2>*h, imidazoline inhibitor with a dissolving speed of 0.01g/cm<2>*h, organic phosphonate antiscale agent and clay or kaolin into a tablet press according to a proportion of 0.4: 1.6: 1: 2 to a prepare solid anticorrosion and antiscale agent 1; step 2: charging the imidazoline inhibitor with the dissolving speed of 0.12g/cm<2>*h, the imidazoline inhibitor with the dissolving speed of 0.05g/cm<2>*h, organic phosphonate antiscale agent and clay or kaolin into a tablet press according to a proportion of 0.4: 1.6: 1: 2 to prepare a solid anticorrosion and antiscale agent 2; selecting the solid anticorrosion and antiscale agent 1 when the underground temperature is more than 50DEG C, and selecting the solid anticorrosion and antiscale agent 2 when the underground temperature is less than 50DEG C; and directly charging the solid anticorrosion and antiscale agents before a tubular post is arranged or charging the solid anticorrosion and antiscale agent into a sieve tube, which is hung under a pump, to charge the solid anticorrosion and antiscale agent into an oil well.
Description
Technical field
The present invention relates to oil field pumping well downhole solid anti-corrosion anti-scale technology, be particularly useful for the echelon method for releasing of Solid Releasing Fresh-keeping Agent.
Background technology
Oil field pumping well downhole corrosion scale problems is FAQs in the oilfield development process, similar problem has all appearred in domestic Daqing oil field, Shengli Oil Field, Tarim Oilfield, oil field, soil Kazakhstan, Jiangsu oilfield, Jilin Oil Field down-hole, the oil field is normally produced to have produced seriously influence.In order to suppress the downhole corrosion fouling, relevant research work has all been launched in each oil field, formed that downhole solid anti-corrosion anti-scale technology, well head add liquid corrosion inhibiting and descaling agent technology, the down-hole hitch point drips the underground anti-corrosion preventing foulings such as doser technology, down-hole magnetic scale control technology, wherein solid anti-corrosion anti-scale utilization is the most extensive.
Solid anti-corrosion anti-scale medicament is made by the according to a certain percentage melting of scale preventative, corrosion inhibiter, adhesive material, filler and synergist, stirring, cooling, moulding usually.After solid anti-corrosion anti-scale medicament dropped into downhole production, under the temperature of down-hole, pressure, flow regime, aqueous conditions, active ingredient to be discharging in certain speed medicament, thereby plays the anti-corrosion anti-scale effect.
During the on-the-spot use of solid anti-corrosion anti-scale agent, can directly add in oil pipe, also can be suspended under the pump, since downhole solid anti-corrosion anti-scale technology have pharmacy security reliable, add time saving and energy saving, once add the advantages such as effective period is long, effective slowing down corrosion speed, prolong the application life of oil pipe, this technology has higher application value to the exploitation of oil field later stage.
Release concentration from tens to tens mg/litre of solid anti-corrosion anti-scale medicament in the down-hole of using at present do not wait, the corrosion inhibition rate 60～90% of common medicament, and scale inhibition performance is more than 90%, has good inhibition, scale inhibition effect.But this technology existent defect, embody in the following areas: medicament once drops into, nothing is replenished means: the enforcement of solid anti-corrosion anti-scale technology mainly is when the oil well well workover, from well head the anti-corrosion anti-scale medicament is dropped into the down-hole, or use special instrument that the anti-corrosion anti-scale medicament is suspended under the pump, can't replenish in the oil well normal productive process and add, medicament dissolution discharge complete after, the downhole corrosion scaling control lost efficacy.Added amount of chemical is limited: staving is long-pending limited because pump for pumping well is hung to go into the well, and solid anti-corrosion anti-scale medicament can only add when workover treatment, so solid anti-corrosion anti-scale added amount of chemical is limited.Prolong and have contradiction between pump detection period and the added amount of chemical: the use of solid anti-corrosion anti-scale technology, prolonged the pump detection period of pumpingh well, prolongation along with pump detection period, need to add more solid anti-corrosion anti-scale medicament, but added amount of chemical is limited, do not replenish again the means that add, therefore have the contradiction that prolongs between pump detection period and the added amount of chemical.Owing to there being above-mentioned shortcoming, after pumpingh well was implemented the measure of solid anti-corrosion anti-scale, pump detection period extended to 8 months from 2 months, was difficult to further improve.
Innovative point of the present invention is, main component corrosion inhibiter in the solid anti-corrosion anti-scale medicament is grouped into by the different one-tenth of dissolution velocity, after dropping into the down-hole, because there is obviously difference in the corrosion inhibiter dissolution properties of different component, changed the dissolving release profiles of solid anti-corrosion anti-scale medicament, make the medicament release feature more meet the For Inhibition Mechanism of Corrosion Inhibitors principle, thereby avoided the waste of solid anti-corrosion anti-scale medicament, guaranteed the drug effect of medicament, effectively prolonged simultaneously the release time of solid anti-corrosion anti-scale medicament, made effectively being prolonged of protection cycle of protection well.
Summary of the invention
The object of the invention is to: the echelon method for releasing is exactly the different anti-corrosion anti-scale medicament of synthesizing series dissolution velocity, according to the down-hole concrete condition, realizes that the fast or slow drug effect of dissolution velocity of dissolution velocity discharges, and realizes solid anti-corrosion anti-scale effect.
The object of the present invention is achieved like this: a kind of echelon method for releasing for the agent of downhole solid anti-corrosion anti-scale, implement step by step;
The preparation of step 1 solid anti-corrosion anti-scale agent:
Be 0.12g/cm with dissolution velocity
2* the imidazoline inhibitor of h, dissolution velocity are 0.01g/cm
2* the imidazoline inhibitor of h, organic phosphonate scale preventative, clay or kaolin, according to 0.4: 1.6: 1: 2 ratio dropped into tablet press machine, and compacting namely getting solid anti-corrosion anti-scale medicament 1, its dissolution velocity 1.5g/h;
Be 0.12g/cm with dissolution velocity
2* the imidazoline inhibitor of h, dissolution velocity are 0.05g/cm
2* the imidazoline inhibitor of h, organic phosphonate scale preventative, clay or kaolin were according to 0.4: 1.6: 1: 2 ratio drops into tablet press machine, suppresses to get solid anti-corrosion anti-scale medicament 2, its dissolution velocity 3.28g/h;
Step 2 adds the agent of solid anti-corrosion anti-scale: the solid anti-corrosion anti-scale medicament that select to be fit to according to the oil well hole condition: when bottom hole temperature (BHT) more than 50 ℃ the time, select solid anti-corrosion anti-scale medicament 1, when bottom hole temperature (BHT) below 50 ℃ the time, select solid anti-corrosion anti-scale medicament 2; Solid anti-corrosion anti-scale medicament directly drops into before the lower tubular column after the oil well well workover or adds to be suspended under the pump in the screen casing and adds in the oil well.
The dissolution velocity that described method is selected is 0.12g/cm
2* the imidazoline inhibitor of h, dissolution velocity are 0.05g/cm
2* the imidazoline inhibitor of h, dissolution velocity are 0.01g/cm
2* the imidazoline inhibitor of h, organic phosphonate scale preventative are produced by power development of new techniques Co., Ltd of Xinjiang section; Clay or kaolin are produced by Karamay, Xinjiang Di Ma Co., Ltd.
The present invention is in order to improve the protection cycle of downhole solid anti-corrosion anti-scale medicament, according to the For Inhibition Mechanism of Corrosion Inhibitors principle, the echelon release tech of solid anti-corrosion anti-scale medicament has been proposed, after this medicament drops into the down-hole, dissolution velocity faster composition at first discharges, on-the-spot corrosion inhibiter adsorbed film plays corrosion inhibition in the metal surface, down-hole; The slower composition of dissolution velocity slowly discharges, the active ingredient Main Function is the corrosion inhibiter adsorbed film of repairing desorption, keep the complete of adsorbed film, the corrosion inhibition that keeps corrosion inhibiter, the medicament of the different dissolution velocities of this usefulness is made solid anti-corrosion anti-scale rod, active ingredient discharges successively in the down-hole, suppress the anti-corrosion anti-scale reagent combination design that the downhole corrosion fouling occurs, be referred to as " echelon release tech ", compare with conventional solid anti-corrosion anti-scale medicament, the difference of echelon release tech medicament is the medicament rate of release, because the medicament rate of release is slow, under the equal chemical feeding quantity, the guard time of medicament is effectively prolonged, Effective Raise the result of use of oil field well solid anti-corrosion anti-scale project, show technological progress.
Description of drawings
Below in conjunction with accompanying drawing invention is described further.
Accompanying drawing 1 is conventional solid anti-corrosion anti-scale medicament dissolution curve map;
Accompanying drawing 2 is this echelon release tech solid anti-corrosion anti-scale medicament dissolution curve map;
As shown in the figure: Fig. 2 and the concentration of Fig. 1 and the positive correlation ratio of time have significant ripple degree.
The specific embodiment
Below in conjunction with embodiment invention is described further.
Embodiment 1
The Xinjiang Oilfield Company Oilfield Operation District, 2135.94 meters of pump setting depths, well temperature 71 degree, production fluid amount 5 side/skies, moisture 60%, implemented before the measure of solid anti-corrosion anti-scale pump detection period 211 days, the mistake calcium rate 9.6% of water in the Produced Liquid, total iron content 27mg/L, corrosion and scaling is serious; Adopt screen casing this moment, adds solid anti-corrosion anti-scale medicament 1, dosage 90Kg, then screen casing is suspended under the pump and adds, after measure is implemented in the Produced Liquid mistake calcium rate of water be reduced to 1.1%, total iron content is reduced to 2.1mg/L, pump detection period extends to 418 days, and corrosion and scaling is effectively controlled.
Embodiment 2
The Xinjiang Oilfield Company Oilfield Operation District, 1704.98 meters of pump setting depths, well temperature 56 degree, production fluid amount 13.8 side/skies, moisture 86%, implemented before the measure of solid anti-corrosion anti-scale pump detection period 224 days, the mistake calcium rate 20.5% of water in the Produced Liquid, total iron content 10.8mg/L, corrosion and scaling is serious; Add 120Kg solid anti-corrosion anti-scale medicament 1 at well head this moment, and the mistake calcium rate that water in the rear Produced Liquid is implemented in measure is reduced to 3.2%, and total iron content is reduced to 1.7mg/L, and pump detection period extends to 362 days, and corrosion and scaling is effectively controlled.
Embodiment 3
The Xinjiang Oilfield Company Oilfield Operation District, 1197.79 meters of pump setting depths, well temperature 40 degree, production fluid amount 12 side/skies, moisture 61%, implemented the front pump detection period of solid anti-corrosion anti-scale measure 141 days, the mistake calcium rate 15.7% of water in the Produced Liquid, total iron content 18.2mg/L, corrosion and scaling is serious, and add 120Kg solid anti-corrosion anti-scale medicament 2 at well head this moment, the mistake calcium rate that water in the rear Produced Liquid is implemented in measure is reduced to 3.1%, total iron content is reduced to 2.5mg/L, and pump detection period extends to 371 days, and corrosion and scaling is effectively controlled.
The dissolution velocity that the present invention adopts is 0.12g/cm
2* the imidazoline inhibitor of h obtains with following method:
Add 0.2mol aphthenic acids (molecular weight 180-200) and 41.6g (0.22moL) TEPA in three-necked bottle, heating is opened simultaneously and is stirred, and reaction is 2 hours under 120 ℃ of conditions; Then temperature rose to 180 ℃ gradually from 120 ℃ in 2h, 190 ℃ of insulations 2.5 hours; Then be warming up to 270 ℃ in the 2h, 270 ℃ of lower insulation reaction 2 hours, namely getting dissolution velocity was 0.12g/cm
2* the imidazoline inhibitor of h
The dissolution velocity that the present invention adopts is 0.05g/cm
2* the imidazoline inhibitor of h obtains with following method:
Add 0.2mol aphthenic acids (molecular weight 250-270) and 41.6g (0.22moL) TEPA in three-necked bottle, heating is opened simultaneously and is stirred, and reaction is 2 hours under 120 ℃ of conditions; Then temperature rose to 180 ℃ gradually from 120 ℃ in 2h, 190 ℃ of insulations 2.5 hours; Then be warming up to 270 ℃ in the 2h, 270 ℃ of lower insulation reaction 2 hours, namely getting dissolution velocity was 0.05g/cm
2* the imidazoline inhibitor of h
The dissolution velocity that the present invention adopts is 0.01g/cm
2* the imidazoline inhibitor of h obtains with following method:
Add 0.2mol aphthenic acids (molecular weight 300-350) and 41.6g (0.22moL) TEPA in three-necked bottle, heating is opened simultaneously and is stirred, and reaction is 2 hours under 120 ℃ of conditions; Then temperature rose to 180 ℃ gradually from 120 ℃ in 2h, 190 ℃ of insulations 2.5 hours; Then be warming up to 270 ℃ in the 2h, 270 ℃ of lower insulation reaction 2 hours, namely getting dissolution velocity was 0.01g/cm
2* the imidazoline inhibitor of h
The said goods is produced by power development of new techniques Co., Ltd of Xinjiang section, and patented application number is 2012102611655.
The downhole solid anti-corrosion anti-scale agent that the present invention adopts, pharmacy security is reliable, it is time saving and energy saving to add, the medicament protection cycle reaches more than 1 year, the advantages such as length, can effectively slow down downhole corrosion, scaling rate, Extended Pump Detection Period, the method has higher application value to the exploitation of oil field later stage.
Claims (2)
1. an echelon method for releasing that is used for the agent of downhole solid anti-corrosion anti-scale is characterized in that: implement step by step;
The preparation of step 1 solid anti-corrosion anti-scale agent:
Be 0.12g/cm with dissolution velocity
2* the imidazoline inhibitor of h, dissolution velocity are 0.01g/cm
2* the imidazoline inhibitor of h, organic phosphonate scale preventative, clay or kaolin, according to 0.4: 1.6: 1: 2 ratio dropped into tablet press machine, suppresses to get solid anti-corrosion anti-scale medicament 1, its dissolution velocity 1.5g/h;
Be 0.12g/cm with dissolution velocity
2* the imidazoline inhibitor of h, dissolution velocity are 0.05g/cm
2* the imidazoline inhibitor of h, organic phosphonate scale preventative, clay or kaolin were according to 0.4: 1.6: 1: 2 ratio drops into tablet press machine, suppresses to get solid anti-corrosion anti-scale medicament 2, its dissolution velocity 3.28g/h;
Step 2 adds the agent of solid anti-corrosion anti-scale: according to the oil well hole condition, select solid anti-corrosion anti-scale medicament, bottom hole temperature (BHT) is selected solid anti-corrosion anti-scale medicament 1 more than 50 ℃, and bottom hole temperature (BHT) is selected solid anti-corrosion anti-scale medicament 2 below 50 ℃; Solid anti-corrosion anti-scale medicament is after the oil well well workover, and lower tubular column directly drops into before or adds to be suspended under the pump in the screen casing and adds in the oil well.
2. described method according to claim 1, it is characterized in that: dissolution velocity is 0.12g/cm
2* the imidazoline inhibitor of h, dissolution velocity are 0.05g/cm
2* the imidazoline inhibitor of h, dissolution velocity are 0.01g/cm
2* the imidazoline inhibitor of h, organic phosphonate scale preventative are produced by power development of new techniques Co., Ltd of Xinjiang section; Clay or kaolin are produced by Karamay, Xinjiang Di Ma Co., Ltd.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104929584A (en) * | 2015-06-23 | 2015-09-23 | 重庆科技学院 | Method for corrosion resistance of inner wall of shaft |
| CN107525733A (en) * | 2017-08-09 | 2017-12-29 | 中国石油化工股份有限公司 | Well head downhole corrosion speed correlation model algorithm and the downhole corrosion speed on-line monitoring method using this algorithm |
| CN109971446A (en) * | 2019-03-20 | 2019-07-05 | 中国石油大学(北京) | A kind of solid corrosion inhibitor and preparation method thereof |
| CN110410048A (en) * | 2019-07-02 | 2019-11-05 | 中国石油天然气股份有限公司 | A method of extending acidification validity period |
| CN111073618A (en) * | 2020-01-03 | 2020-04-28 | 陕西日新石油化工有限公司 | Solid corrosion inhibitor capable of being released uniformly and preparation method thereof |
| CN115182703A (en) * | 2021-04-07 | 2022-10-14 | 中国石油化工股份有限公司 | Gas well descaling and blockage removing method and solid descaling and blockage removing agent for gas production |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104929584A (en) * | 2015-06-23 | 2015-09-23 | 重庆科技学院 | Method for corrosion resistance of inner wall of shaft |
| CN107525733A (en) * | 2017-08-09 | 2017-12-29 | 中国石油化工股份有限公司 | Well head downhole corrosion speed correlation model algorithm and the downhole corrosion speed on-line monitoring method using this algorithm |
| CN107525733B (en) * | 2017-08-09 | 2020-07-03 | 中国石油化工股份有限公司 | Wellhead downhole corrosion rate correlation model algorithm and downhole corrosion rate online monitoring method using same |
| CN109971446A (en) * | 2019-03-20 | 2019-07-05 | 中国石油大学(北京) | A kind of solid corrosion inhibitor and preparation method thereof |
| CN110410048A (en) * | 2019-07-02 | 2019-11-05 | 中国石油天然气股份有限公司 | A method of extending acidification validity period |
| CN111073618A (en) * | 2020-01-03 | 2020-04-28 | 陕西日新石油化工有限公司 | Solid corrosion inhibitor capable of being released uniformly and preparation method thereof |
| CN115182703A (en) * | 2021-04-07 | 2022-10-14 | 中国石油化工股份有限公司 | Gas well descaling and blockage removing method and solid descaling and blockage removing agent for gas production |
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| CN103075132B (en) | 2015-07-08 |
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Address after: 834000 Friendship Road, the Xinjiang Uygur Autonomous Region, Karamay No. 138 Patentee after: XINJIANG KELI NEW TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 834000 Friendship Road, the Xinjiang Uygur Autonomous Region, Karamay No. 138 Patentee before: XINJIANG KELI NEW TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Denomination of invention: Echelon releasing method for underground solid anticorrosion and antiscale agents Effective date of registration: 20181026 Granted publication date: 20150708 Pledgee: Bank of Kunlun Limited by Share Ltd. Karamay branch Pledgor: XINJIANG KELI NEW TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: 2018650000003 |
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