CN103075132B - 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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- CN103075132B CN103075132B CN201310025638.6A CN201310025638A CN103075132B CN 103075132 B CN103075132 B CN 103075132B CN 201310025638 A CN201310025638 A CN 201310025638A CN 103075132 B CN103075132 B CN 103075132B
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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 oilfield development process, all having there is similar problem in domestic Daqing oil field, Shengli Oil Field, Tarim Oilfield, oil field, soil Kazakhstan, Jiangsu oilfield, Jilin Oil Field down-hole, normally produces create serious impact to oil field.In order to suppress downhole corrosion fouling, each oil field all expands relevant research work, define downhole solid anti-corrosion anti-scale technology, the underground anti-corrosion preventing fouling such as well head adds liquid corrosion inhibiting and descaling agent technology, down-hole hitch point drips doser technology, down-hole magnetic scale control technology, wherein solid anti-corrosion anti-scale technology uses the most extensive.
Solid anti-corrosion anti-scale medicament is usually by scale preventative, corrosion inhibiter, adhesive material, filler and synergist melting according to a certain percentage, stirring, cooling, shaping obtained.After solid anti-corrosion anti-scale medicament drops into downhole production, under the temperature in down-hole, pressure, flow regime, aqueous conditions, active ingredient to discharge in certain speed medicament, thus plays anti-corrosion anti-scale effect.
During solid anti-corrosion anti-scale agent onsite application, can directly add in oil pipe, also under can being suspended on pump, due to 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, can effective slowing down corrosion speed, extend the application life of oil pipe, this technology has higher application value to the exploitation of oil field later stage.
From ten a few to tens of mg/litre not etc., the corrosion inhibition rate 60 ~ 90% of usual medicament, scale inhibition performance is more than 90% to the solid anti-corrosion anti-scale medicament of the current use release concentration in down-hole, has good inhibition, scale inhibition effect.But there is shortcoming in this technology, embody in the following areas: medicament once drops into, without the means of supplementing out economy: the enforcement of solid anti-corrosion anti-scale technology is mainly when oil well well workover, from well head, anti-corrosion anti-scale medicament is dropped into down-hole, or under using special instrument that anti-corrosion anti-scale medicament is suspended on pump, cannot supplement in oil well normal productive process and add, after medicament dissolution release, downhole corrosion scaling control lost efficacy.Added amount of chemical is limited: because pump for pumping well is hung limited with bucket volume of going into the well, and solid anti-corrosion anti-scale medicament can only add when workover treatment, and therefore solid anti-corrosion anti-scale added amount of chemical is limited.Extend between pump detection period and added amount of chemical and there is contradiction: the use of solid anti-corrosion anti-scale technology, extend the pump detection period of pumpingh well, along with the prolongation of pump detection period, need to add more solid anti-corrosion anti-scale medicament, but added amount of chemical is limited, do not supplement again and add means, therefore there is the contradiction extended between pump detection period and added amount of chemical.Owing to there is above-mentioned shortcoming, after the measure of solid anti-corrosion anti-scale implemented by pumpingh well, pump detection period extended to 8 months from 2 months, was difficult to improve further.
Innovative point of the present invention is, main component corrosion inhibiter in solid anti-corrosion anti-scale medicament is grouped into by the one-tenth that dissolution velocity is different, after dropping into down-hole, there is obviously difference in the corrosion inhibiter dissolution properties due to different component, change the dissolving release profiles of solid anti-corrosion anti-scale medicament, medicament release feature is made more to meet For Inhibition Mechanism of Corrosion Inhibitors principle, thus avoid the waste of solid anti-corrosion anti-scale medicament, ensure that the drug effect of medicament, effectively extend the release time of solid anti-corrosion anti-scale medicament simultaneously, make effectively being extended of the protection cycle of protection well.
Summary of the invention
The object of the invention is to: echelon method for releasing, is exactly the different anti-corrosion anti-scale medicament of synthesizing series dissolution velocity, according to down-hole concrete condition, realizes the slow drug effect release of the fast or dissolution velocity of dissolution velocity, 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, implements step by step;
The preparation of step 1 solid anti-corrosion anti-scale agent:
Be 0.12 g/ (cm by dissolution velocity
2h) imidazoline inhibitor, dissolution velocity are 0.01g/ (cm
2h) imidazoline inhibitor, organic phosphonate scale preventative, clay or kaolin, the ratio according to 0.4: 1.6: 1: 2 drops into tablet press machine, suppresses and obtain solid anti-corrosion anti-scale medicament 1, its dissolution velocity 1.5g/h;
Be 0.12 g/ (cm by dissolution velocity
2h) imidazoline inhibitor, dissolution velocity are 0.05 g/ (cm
2h) imidazoline inhibitor, organic phosphonate scale preventative, clay or kaolin drop into tablet press machine according to the ratio of 0.4: 1.6: 1: 2, suppress to obtain solid anti-corrosion anti-scale medicament 2, its dissolution velocity 3.28g/h;
Step 2 adds the agent of solid anti-corrosion anti-scale: select the solid anti-corrosion anti-scale medicament be applicable to according to oil well hole condition: when bottom hole temperature (BHT) is more than 50 DEG C, selects solid anti-corrosion anti-scale medicament 1, when bottom hole temperature (BHT) is below 50 DEG C, selects solid anti-corrosion anti-scale medicament 2; Solid anti-corrosion anti-scale medicament directly dropped into before oil well well workover down tube post or add in screen casing be suspended on pump under add in oil well.
The dissolution velocity of described method selection is 0.12 g/ (cm
2h) imidazoline inhibitor, dissolution velocity are 0.05 g/ (cm
2h) imidazoline inhibitor, dissolution velocity are 0.01 g/ (cm
2h) imidazoline inhibitor, organic phosphonate scale preventative are produced by Xinjiang Keli New Technology Development Co., Ltd.; 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 For Inhibition Mechanism of Corrosion Inhibitors principle, propose the echelon release tech of solid anti-corrosion anti-scale medicament, after this medicament drops into down-hole, first dissolution velocity faster composition discharges, in metal surface, down-hole, on-the-spot corrosion inhibiter adsorbed film, plays corrosion inhibition, the composition slow releasing that dissolution velocity is slower, active ingredient Main Function is the corrosion inhibiter adsorbed film repairing desorption, maintain the complete of adsorbed film, keep the corrosion inhibition of corrosion inhibiter, solid anti-corrosion anti-scale rod made by the medicament of the different dissolution velocity of this use, in down-hole, active ingredient discharges successively, the anti-corrosion anti-scale reagent combination design suppressing downhole corrosion fouling to occur, be referred to as " echelon release tech ", compared with Conventional solid anti-corrosion anti-scale medicament, the difference of echelon release tech medicament is medicament rate of release, because medicament rate of release is slow, under equal chemical feeding quantity, the guard time of medicament is effectively extended, effectively improve the result of use of oil field well solid anti-corrosion anti-scale project, show technological progress.
Accompanying drawing explanation
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: the concentration of Fig. 2 and Fig. 1 and the positive correlation ratio of time, have significant ripple degree.
Detailed description of the invention
Below in conjunction with embodiment, invention is described further.
Embodiment 1
Xinjiang Oilfield Company Oilfield Operation District, pump setting depth 2135.94 meters, well temperature 71 degree, Liquid output 5 sides/sky, moisture 60%, pump detection period 211 days before the measure of enforcement solid anti-corrosion anti-scale, the mistake calcium rate 9.6%, total iron content 27mg/L of water in Produced Liquid, corrosion and scaling is serious; Now adopt screen casing, add solid anti-corrosion anti-scale medicament 1, dosage 90Kg, then add under screen casing being suspended on pump, the mistake calcium rate that water in rear Produced Liquid is implemented in measure is reduced to 1.1%, and 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
Xinjiang Oilfield Company Oilfield Operation District, pump setting depth 1704.98 meters, well temperature 56 degree, Liquid output 13.8 sides/sky, moisture 86%, pump detection period 224 days before the measure of enforcement solid anti-corrosion anti-scale, the mistake calcium rate 20.5%, total iron content 10.8mg/L of water in Produced Liquid, corrosion and scaling is serious; Now add 120Kg solid anti-corrosion anti-scale medicament 1 at well head, the mistake calcium rate that water in 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
Xinjiang Oilfield Company Oilfield Operation District, pump setting depth 1197.79 meters, well temperature 40 degree, Liquid output 12 sides/sky, moisture 61%, pump detection period 141 days before the measure of enforcement solid anti-corrosion anti-scale, the mistake calcium rate 15.7% of water in Produced Liquid, total iron content 18.2mg/L, corrosion and scaling is serious, now adds 120Kg solid anti-corrosion anti-scale medicament 2 at well head, the mistake calcium rate that water in 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 0.12 g/ (cm
2h) the following method of imidazoline inhibitor obtains:
In three-necked bottle, add 0.2mol aphthenic acids (molecular weight 180-200) and 41.6g (0.22moL) TEPA, heating opens stirring simultaneously, reacts 2 hours under 120 DEG C of conditions; Then temperature rose to 180 DEG C gradually from 120 DEG C in 2h, 190 DEG C of insulations 2.5 hours; Then be warming up to 270 DEG C in 2h, insulation reaction 2 hours at 270 DEG C, obtaining dissolution velocity is 0.12 g/ (cm
2h) imidazoline inhibitor
The dissolution velocity that the present invention adopts is 0.05 g/ (cm
2h) the following method of imidazoline inhibitor obtains:
In three-necked bottle, add 0.2mol aphthenic acids (molecular weight 250-270) and 41.6g (0.22moL) TEPA, heating opens stirring simultaneously, reacts 2 hours under 120 DEG C of conditions; Then temperature rose to 180 DEG C gradually from 120 DEG C in 2h, 190 DEG C of insulations 2.5 hours; Then be warming up to 270 DEG C in 2h, insulation reaction 2 hours at 270 DEG C, obtaining dissolution velocity is 0.05 g/ (cm
2h) imidazoline inhibitor
The dissolution velocity that the present invention adopts is 0.01 g/ (cm
2h) the following method of imidazoline inhibitor obtains:
In three-necked bottle, add 0.2mol aphthenic acids (molecular weight 300-350) and 41.6g (0.22moL) TEPA, heating opens stirring simultaneously, reacts 2 hours under 120 DEG C of conditions; Then temperature rose to 180 DEG C gradually from 120 DEG C in 2h, 190 DEG C of insulations 2.5 hours; Then be warming up to 270 DEG C in 2h, insulation reaction 2 hours at 270 DEG C, obtaining dissolution velocity is 0.01 g/ (cm
2h) imidazoline inhibitor
The said goods is produced by Xinjiang Keli New Technology Development Co., Ltd., 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., for an echelon method for releasing for downhole solid anti-corrosion anti-scale agent, it is characterized in that: implement step by step;
The preparation of step 1 solid anti-corrosion anti-scale agent:
Be 0.12 g/ (cm by dissolution velocity
2h) imidazoline inhibitor, dissolution velocity are 0.01g/ (cm
2h) imidazoline inhibitor, organic phosphonate scale preventative, clay or kaolin, the ratio according to 0.4: 1.6: 1: 2 drops into tablet press machine, suppresses to obtain solid anti-corrosion anti-scale medicament 1, its dissolution velocity 1.5g/h;
Be 0.12 g/ (cm by dissolution velocity
2h) imidazoline inhibitor, dissolution velocity are 0.05 g/ (cm
2h) imidazoline inhibitor, organic phosphonate scale preventative, clay or kaolin drop into tablet press machine according to the ratio of 0.4: 1.6: 1: 2, suppress to obtain 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 oil well hole condition, selects solid anti-corrosion anti-scale medicament, and bottom hole temperature (BHT), more than 50 DEG C, selects solid anti-corrosion anti-scale medicament 1, and bottom hole temperature (BHT), below 50 DEG C, selects solid anti-corrosion anti-scale medicament 2; Solid anti-corrosion anti-scale medicament after oil well well workover, directly drop into before lower tubular column or add in screen casing be suspended on pump under add in oil well.
2. method according to claim 1, is characterized in that: dissolution velocity is 0.12 g/ (cm
2h) imidazoline inhibitor, dissolution velocity are 0.05 g/ (cm
2h) imidazoline inhibitor, dissolution velocity are 0.01 g/ (cm
2h) imidazoline inhibitor, organic phosphonate scale preventative are produced by Xinjiang Keli New Technology Development Co., Ltd.; Clay or kaolin are produced by Karamay, Xinjiang Di Ma Co., Ltd.
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| CN104929584B (en) * | 2015-06-23 | 2017-11-10 | 重庆科技学院 | Shaft in wall anti-corrosion method |
| 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 |
| CN109971446B (en) * | 2019-03-20 | 2020-09-29 | 中国石油大学(北京) | Solid corrosion inhibitor and preparation method thereof |
| CN110410048B (en) * | 2019-07-02 | 2022-03-29 | 中国石油天然气股份有限公司 | Method for prolonging 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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| CN101230260A (en) * | 2007-11-01 | 2008-07-30 | 新疆德蓝科技有限公司 | Compound inhibitor for exploitation of oil-gas field and preparation method thereof |
| CN101565608A (en) * | 2009-05-25 | 2009-10-28 | 新疆大学 | Preparation method of novel acidified corrosion inhibitor and use thereof |
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| FR2875510B1 (en) * | 2004-09-22 | 2007-05-25 | Ceca Sa Sa | TREATMENT PROCESS FOR INHIBITING THE CORRELATION OF PIPES TOWERS USED IN THE PETROLEUM INDUSTRY |
| US7918281B2 (en) * | 2007-03-06 | 2011-04-05 | Baker Hughes Incorporated | Method of treating flow conduits and vessels with foamed composition |
| US8022018B2 (en) * | 2009-12-21 | 2011-09-20 | Baker Hughes Incorporated | Quaternized dithiazines and method of using same in treatment of wells |
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| CN101230260A (en) * | 2007-11-01 | 2008-07-30 | 新疆德蓝科技有限公司 | Compound inhibitor for exploitation of oil-gas field and preparation method thereof |
| CN101565608A (en) * | 2009-05-25 | 2009-10-28 | 新疆大学 | Preparation method of novel acidified corrosion inhibitor and use thereof |
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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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Date of cancellation: 20230215 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 |