CN102942911B - Hydrogenation hot gas chemical yield increasing solution component applied to low-yield low-permeability oil well - Google Patents
Hydrogenation hot gas chemical yield increasing solution component applied to low-yield low-permeability oil well Download PDFInfo
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- CN102942911B CN102942911B CN201210479737.7A CN201210479737A CN102942911B CN 102942911 B CN102942911 B CN 102942911B CN 201210479737 A CN201210479737 A CN 201210479737A CN 102942911 B CN102942911 B CN 102942911B
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Abstract
The invention belongs to the technical field of oil exploitation, and particularly relates to a hydrogenation hot gas chemical yield increasing solution component capable of being used for increasing productivity of a low-yield low-permeability oil well. The solution component comprises first solution and second solution, the mass ratio of the first solution to the second solution is 1:1, the first solution comprises ammonium nitrate, ammonium chloride, urea, urea nitrate, glucose and water, and the second solution comprises sodium nitrite, urea, aluminum dodecaboride and carbon dichloride. The first solution and the second solution react, carry energy, penetrate through a well-cased perforating area of the oil well at a high speed and enter micro-cracks and air holes of near wellbore region rock strata, the micro-cracks can be broken through under the action of high-temperature high-pressure gas, oil-gas seepage channels are communicated, seepage resistance is decreased, drainage area is increased, accordingly, permeability of the near wellbore region rock strata is improved, and further the productivity of the individual well is increased.
Description
Technical field
The invention belongs to technical field of petroleum extraction, be specifically related to a kind of solution components that can be used for improving the heat from hydrogenation chemistry volume increase of low yield low-permeability oil well productivity.
Background technology
In China, low permeability oil and gas field is extensively distributed in each HYDROCARBON-BEARING REGION in the whole nation, and proven reserve are 6,300,000,000 tons, account for and verify 28% of total reserves.Conventional LOW PERMEABILITY OILFIELD DEVELOPMENT yield-increasing technology mainly contains fracturing technique, Acidizing Technology, exploding in fracture yield-increasing technology etc.
Fracturing technique, injects the high pressure water exceeding rock burst degree, reservoir rock is broken in reservoir, forms oil and gas flow passage, will use propping agent in fracturing process, and construction is complicated, and cost is high, and validity period is short, can not repeatedly adopt; Acidizing Technology, by dissolving to acid filling in stratum the perviousness that tamper in duct improves oil reservoir, this method formation has certain destructiveness.Exploding in fracture yield-increasing technology, a certain amount of explosive is inserted the well place at reservoir place, the high temperature and high pressure gas utilizing explosive charge to produce acts on rock stratum, form the crack being beneficial to oil and gas flow, but blast sometimes can damage pit shaft.
Hyposmosis oil well heat from hydrogenation chemistry method for increasing is by the energy of chemical reaction discharging step by step, the high temperature and high pressure gas formation generation physics and chemistry effect of generation, effectively can improve the rate of permeation of nearly well band, reduce reducing crude oil viscosity, improve single well productivity.Have that construction is simple, cost is low, little to environmental influence, effect of increasing production obviously and the advantage such as the time length is long, be a kind of hyposmosis oil well method for increasing with development potentiality.
Summary of the invention
The object of this invention is to provide the solution components of a kind of low yield hyposmosis oil well heat from hydrogenation chemistry volume increase, this solution components, by improving the porosity and permeability of low-permeability oil deposit reservoir immediate vicinity of wellbore, improves single well productivity.
The present invention is achieved in that
First, prepare two kinds of working solutions (No. 1 solution, No. 2 solution) according to the structural parameter of hyposmosis oil well, require that No. 1 solution and No. 2 liquor capacity sums are less than the volume of oil well reaction zone.Reaction zone refers to the space (see figure 1) in from artificial bottom of a well to perforation district upper surface sleeve pipe farthest.Calculated by chemical reaction and guarantee that two kinds of solution fully react, then prepare No. 1 solution and No. 2 solution are injected in well by oil pipe successively.
No. 1 solution, calculates, by the ammonium nitrate NH of 50.8 ~ 60.1% by quality and 100%
4nO
3, 8.7 ~ 10.5% ammonium chloride NH
4cI, 11.2 ~ 12.5% urea CO (NH
2)
2, 4.0 ~ 5.2% urea nitrate (Zhong Sheng Hua Teng Science and Technology Ltd. buys in Beijing) CO (NH
2)
2hNO
3, 0.5 ~ 1.5% glucose C
6h
12o
6with the water H of surplus
2o forms.
Further, No. 1 solution calculates, by the ammonium nitrate NH of 53 ~ 59% by quality and 100%
4nO
3, 8.7 ~ 10% ammonium chloride NH
4cI, 11.2 ~ 12.5% urea CO (NH
2)
2, 4.0 ~ 5.0% urea nitrate CO (NH
2)
2hNO
3, 0.5 ~ 1.5% glucose C
6h
12o
6with 14.5 ~ 21% water H
2o forms.
The preparation method of No. 1 solution:
1.1 press solution quality and 100% calculates, in container, first add the ammonium nitrate of 53 ~ 59%;
The ammonium chloride of 8.7 ~ 10% and the urea CO (NH of 11.2 ~ 12.5% is added after 1.2
2)
2;
1.3 add in container again 14.5 ~ 21% water, fully stir 10 ~ 20 minutes;
1.4 finally add the urea nitrate of 4.0 ~ 5.0% and the glucose of 0.5 ~ 1.5%, fully stir 10 ~ 20 minutes, have so just obtained No. 1 solution.
No. 2 solution, calculate, by the Sodium Nitrite NaNO of 40.2 ~ 60.5% by quality and 100%
2, 14.0 ~ 21.3% urea CO (NH
2)
2, 6.0 ~ 18.0% ten aluminium diboride AlB
12the zellon C of (the biological reagent company limited that writes from memory in Guangzhou one hundred buys) and surplus
2cl
4(a purple chemical reagent work buys in Shanghai) composition; Zellon, as solvent, can reduce the solubleness of each component, and improve concentration and the mobility of original solution, this both ensure that the chemical property of each component, was beneficial to again and injected in well.
Further, No. 2 solution calculate, by the Sodium Nitrite NaNO of 41 ~ 60% by quality and 100%
2, 15 ~ 20% urea CO (NH
2)
2, 7.6 ~ 18.0% ten aluminium diboride AlB
12with 17.4 ~ 21% zellon C
2cl
4composition;
The preparation method of No. 2 solution:
2.1 press solution quality and 100% calculates, in container, first add the Sodium Nitrite of 41 ~ 60%;
Add the urea of 15 ~ 20% in the backward container of 2.2, fully stir 10 ~ 20 minutes;
2.3 pour in container again 17.4 ~ 21% zellon, fully stir 10 ~ 20 minutes;
Add ten aluminium diborides of 7.6 ~ 18.0% in 2.4 the most backward containers, fully stir 10 ~ 20 minutes, this has just obtained No. 2 solution.
No. 1 solution and No. 2 solution sink to artificial bottom of a well (No. 1 solution and No. 2 solution 1:1 inputs in mass ratio) by self gravitation effect, and two kinds of solution start chemical reaction occurs in shaft bottom.Glucose C
6h
12o
6effect both can reduce the thermostability of ammonium nitrate, can be used as again the stablizer of whole reaction process.Reaction equation is as follows:
NaNO
2+NH
4Cl=NaCI+N
2+2H
2O+Q ①
NaNO
2+NH
4NO
3=NaNO
3+N
2+2H
2O+Q ②
NaNO
2+CO(NH
2)
2+H
+=2N
2+CO
2+3H
2O+Na
++Q ③
Above-mentioned reaction can generate a large amount of gas and release heat.Sour environment needed for reaction is obtained by ammonium nitrate hydrolysis, and reaction equation is as follows:
NH
4NO
3+H
2O=H
++NO
3 -+NH
4OH ④
Chemical reaction liberated heat can make temperature in conversion zone raise rapidly, when temperature is higher than 200 ~ 250 ° of C, can cause water reaction agent ten aluminium diboride AlB
12with the water generation chemical reaction in No. 1 solution, and discharge a large amount of hydrogen H
2and heat, reaction equation is as follows:
2AlB
12+78H
2O=2Al（OH）
3+24B（OH）
3+39H
2+Q ⑤
While 5. chemical reaction occurs, No. 1 solution dehydrates, ammonium nitrate generation pyrolysis, generate a large amount of gas and heat, reaction equation is as follows:
2NH
4NO
3=2N
2+4H
2O+O
2+Q ⑥
8NH
4NO
3=5N
2+4NO+2NO
2+16H
2O+Q ⑦
As can be seen here, the whole reaction process of No. 1 solution and No. 2 solution can be divided into three step of reaction, and each step of reaction discharges a large amount of gas and heat.Nitrogen N
2, hydrogen H
2, oxygen O
2, carbonic acid gas CO
2in the carrier that gas is heat, they carry energy enters into nearly well band rock stratum through well-cased perforating district tiny crack and pore with very high speed, tiny crack can be got through under high temperature and high pressure gas effect, be communicated with oil and gas flow passage, reduce seepage resistance, increase drainage area, thus improve the perviousness of nearly well band rock stratum.
In addition, can make to be deposited on the organic plugging thing intensifications such as the paraffin bituminous matter in oil reservoir duct, immediate vicinity of wellbore and melt under the effect of hot gas, make heavy crude composition expanded formation air-fuel mixture phase, thus reduce viscosity of crude, reach the object of de-plugging viscosity reduction.Hydrogen H
2making except joint function except having, also having catalytic cracking effect to higher hydrocabon, higher hydrocabon is changed into light ends.After hydrogen is to rock stratum thermochemistry effect, effectively can realize the de-plugging of rock stratum pore interior, improve the porosity of rock stratum.
In immediate vicinity of wellbore, the initial stage of reaction process has acid to generate, and formation can form acidification, dissolve some oxide compounds and carbonate.The flow resistance in hyposmosis district around pit shaft can be got rid of further, improve rate of permeation, and then improve single well productivity.
In a word, hyposmosis oil well heat from hydrogenation chemistry method for increasing be integrate pressure break, the integrated technology of the technology such as acidifying, heat are handled up, technique simply, not destroys stratal configuration, effectively can improve the porosity and permeability of reservoir immediate vicinity of wellbore, and then improves single well productivity.
Accompanying drawing explanation
Fig. 1: structure of oil well schematic diagram;
Wherein: well head 1; Oil pipe 2; Sleeve pipe 3; Well-cased perforating 4; 5 artificials bottom of a well 5; Oil reservoir 6;
Fig. 2: to implement after stimulation work No. 1 daily flow curve June 17 28 days to 2010 November in 2009;
Fig. 3: to implement after stimulation work No. 2 daily flow curves June 17 28 days to 2010 November in 2009.
Embodiment
Embodiment 1: Daqing oil field No. 1 oil well heat from hydrogenation chemistry stimulation work
The geologic condition of No. 1 oil well and correlation parameter: reservoir system sandstone and siltstone; Mesopore low permeability pay; Casing inner diameter
well depth 1241m; Artificial bottom of a well 1231.2m; Perforation scope 1175.5 ~ 1146.0m; Stimulation work production fluid day before yesterday 3.2t, wherein day produce oil 2.5t; Can show that reaction zone volume is 988L by above data.Prepare No. 1 solution 520kg, No. 2 solution 520kg.
No. 1 solution composition comprises: ammonium nitrate NH
4nO
3, ammonium chloride NH
4cl, urea CO (NH
2)
2, urea nitrate CO (NH
2)
2hNO
3, glucose C
6h
12o
6, water H
2o, mass percent shared separately: 59%, 9%, 12%, 5%, 0.5%, 14.5%.The quality of each component is respectively: ammonium nitrate 306.8kg, ammonium chloride 46.8kg, urea 62.4kg, urea nitrate 26kg, glucose 2.6kg, water 75.4kg.
No. 2 solution compositions comprise: Sodium Nitrite NaNO
2, urea CO (NH
2)
2, ten aluminium diboride AlB
12, zellon C
2cl
4, mass percent shared separately: 60%, 15%, 7.6%, 17.4%.The quality of each component is respectively: Sodium Nitrite 312kg, urea 78kg, ten aluminium diboride 39.52kg, zellon 90.48kg.
On November 19th, 2009, be injected in well by oil pipe successively by No. 1 solution and No. 2 solution, closing well resumes production after reacting 24 hours.
By checking that record of production finds, No. 1 oil well production increasing phenomenon is obvious, stimulation work production fluid day before yesterday 3.2t, wherein day produce oil 2.5t, initial stage liquid after stimulation work, oil volume increase reach 275% respectively, 256%(is shown in Fig. 2), 305 days have been reached, accumulative increasing oil 471.9 tons to lasting volume increase on September 29 in 2010; Nearly 20 months are increased production continuously, accumulative increasing oil 1268.2 tons, individual well net response on the same day 4.5 tons on June 30th, 2011; By the end of on April 30th, 2012, No. 1 oil well had a net increase of product more than 1500 tons.
Embodiment 2: Daqing oil field No. 2 oil well heat from hydrogenation chemistry stimulation work
The geologic condition of No. 2 oil wells and correlation parameter: reservoir system sandstone and siltstone; Mesopore low permeability pay; Casing inner diameter
well depth 1280.1m; Artificial bottom of a well 1282.03m; Perforation scope 1208.2 ~ 1182.2m; Stimulation work production fluid day before yesterday 4.3t, wherein day produce oil 4.0t; Show that reaction zone volume is 1158L by above data.Prepare No. 1 solution 715kg, No. 2 solution 715kg.
No. 1 solution composition comprises: ammonium nitrate NH
4nO
3, ammonium chloride NH
4cI, urea CO (NH
2)
2, urea nitrate CO (NH
2)
2hNO
3, glucose C
6h
12o
6, water H
2o, mass percent shared separately: 53%, 8.7%, 11.2%, 4.6%, 1.5%, 21%.The quality of each component is respectively: ammonium nitrate 378.95kg, ammonium chloride 62.205kg, urea 80.08kg, urea nitrate 32.89kg, glucose 10.725kg, water 150.15kg.
No. 2 solution compositions comprise: Sodium Nitrite NaNO
2, urea CO (NH
2)
2, ten aluminium diboride AlB
12, zellon C
2cl
4, mass percent shared separately: 41%, 20%, 18%, 21%.The quality of each component is respectively: Sodium Nitrite 293.15kg, urea 143kg, ten aluminium diboride 128.7kg, zellon 150.15kg.
On November 19th, 2009, be injected in well by oil pipe successively by No. 1 solution and No. 2 solution, closing well resumes production after reacting 24 hours.
By checking that record of production finds, No. 2 well oil increasing effects are obvious, stimulation work production fluid day before yesterday 4.3t, wherein day produce oil 4.0t, front 4 monthly average day produce oil 7.0t(after stimulation work are shown in Fig. 3), reach 167 days to volume increase on September 29th, 2010 validity period, accumulative increasing oil 407.1 tons; Nearly 20 months are increased production continuously, accumulative increasing oil 1519.6 tons, individual well net response on the same day 7.6 tons on June 30th, 2011; By the end of on April 30th, 2012, No. 2 wells had a net increase of product more than 2000 tons.
Embodiment 3: Daqing oil field No. 3 oil well heat from hydrogenation chemistry stimulation work
The geologic condition of No. 3 oil wells and correlation parameter: reservoir system sandstone and siltstone; Mesopore low permeability pay; Casing inner diameter
well depth 1003.1m; Artificial bottom of a well 1005.25m; Perforation scope 963.8 ~ 940.6m; This well is abandoned well before stimulation work, day produce oil 0t; Can show that reaction zone volume is 750L by above data.Prepare No. 1 solution 455kg, No. 2 solution 455kg.
No. 1 solution composition comprises: ammonium nitrate NH
4nO
3, ammonium chloride NH
4cl, urea CO (NH
2)
2, urea nitrate CO (NH
2)
2hNO
3, glucose C
6h
12o
6, water H
2o, mass percent shared separately: 55%, 10%, 12.5%, 4%, 1%, 17.5%.The quality of each component is respectively: ammonium nitrate 250.25kg, ammonium chloride 45.5kg, urea 56.875kg, urea nitrate 18.2kg, glucose 4.55kg, water 79.625kg.
No. 2 solution compositions comprise: Sodium Nitrite NaNO
2, urea CO (NH
2)
2, ten aluminium diboride AlB
12, zellon C
2cl
4, mass percent shared separately: 50%, 17.5%, 12%, 20.5%.The quality of each component is respectively: Sodium Nitrite 227.5kg, urea 79.625kg, ten aluminium diboride AlB
1254.6kg, zellon 93.275kg.
On November 19th, 2009, be injected in well by oil pipe successively by No. 1 solution and No. 2 solution, closing well resumes production after reacting 24 hours.
By checking that record of production finds, No. 3 wells have recovered production capacity again, to accumulative produce oil 198.1 tons on May 10th, 2010; After this, No. 3 oil wells keep again the discarded state that stops production.
Underground trials shows, hyposmosis oil well heat from hydrogenation chemistry method for increasing is by the physics and chemistry effect of formation, and effectively can improve the porosity and permeability of nearly well band, improve single well productivity, effect of increasing production is lasting, technique is simple, is a comprehensive low permeability oil field production technique.
Claims (4)
1. one kind is applied to the solution components of low yield hyposmosis oil well heat from hydrogenation chemistry volume increase, it is characterized in that: No. 1 solution and No. 2 solution compositions that by mass ratio are 1:1, No. 1 solution and No. 2 solution sink to artificial bottom of a well by self gravitation effect, and two kinds of solution start chemical reaction occurs in shaft bottom; Calculate by quality and 100%, No. 1 solution by 50.8 ~ 60.1% ammonium nitrate NH
4n О
3, 8.7 ~ 10.5% ammonium chloride NH
4cI, 11.2 ~ 12.5% urea CO (NH
2)
2, 4.0 ~ 5.2% urea nitrate CO (NH
2)
2hNO
3, 0.5 ~ 1.5% glucose C
6h
12o
6with the water H of surplus
2o forms; Calculate by quality and 100%, No. 2 solution by 40.2 ~ 60.5% Sodium Nitrite NaNO
2, 14.0 ~ 21.3% urea CO (NH
2)
2, 6.0 ~ 18.0% ten aluminium diboride А lB
12with the zellon C of surplus
2cl
4composition.
2. a kind of solution components being applied to the volume increase of low yield hyposmosis oil well heat from hydrogenation chemistry as claimed in claim 1, is characterized in that: calculate by quality and 100%, No. 1 solution by 53 ~ 59% ammonium nitrate NH
4n О
3, 8.7 ~ 10% ammonium chloride NH
4cI, 11.2 ~ 12.5% urea CO (NH
2)
2, 4.0 ~ 5.0% urea nitrate CO (NH
2)
2hNO
3, 0.5 ~ 1.5% glucose C
6h
12o
6with 14.5 ~ 21% water H
2o forms.
3. a kind of solution components being applied to the volume increase of low yield hyposmosis oil well heat from hydrogenation chemistry as claimed in claim 1, is characterized in that: calculate by quality and 100%, No. 2 solution by 41 ~ 60% Sodium Nitrite NaNO
2, 15 ~ 20% urea CO (NH
2)
2, 7.6 ~ 18.0% ten aluminium diboride А lB
12with 17.4 ~ 21% zellon C
2cl
4composition.
4., as a kind of solution components that be applied to low yield hyposmosis oil well heat from hydrogenation chemistry volume increase of claims 1 to 3 as described in any one, it is characterized in that: the volume sum of No. 1 solution and No. 2 solution is less than the reaction zone volume of low yield hyposmosis oil well.
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| CN105156082A (en) * | 2015-07-10 | 2015-12-16 | 延安双丰石油技术有限公司 | Method and combined solution for increasing productivity of low-porosity, low-permeability and low-pressure reservoir oil well |
| CN105672963B (en) * | 2016-01-06 | 2017-11-21 | 吉林冠通能源科技有限公司 | A kind of well production increment method that hydrogen component is released using hydration reaction |
| CN111647398A (en) * | 2020-01-15 | 2020-09-11 | 中国石油大学(北京) | Self-suspending proppant based on pneumatic effect and preparation method thereof |
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|---|---|---|---|---|
| WO2007061816A2 (en) * | 2005-11-18 | 2007-05-31 | Chevron U.S.A. Inc. | Controlling the pressure within an annular volume of a wellbore |
| CN101230261A (en) * | 2008-01-09 | 2008-07-30 | 韩炜 | New method for oil well yield increasing and hydrogen release active reagent components |
| CN101735789A (en) * | 2009-12-15 | 2010-06-16 | 华鼎鸿基采油技术服务（北京）有限公司 | Foam compound oil displacement agent and preparation method thereof |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007061816A2 (en) * | 2005-11-18 | 2007-05-31 | Chevron U.S.A. Inc. | Controlling the pressure within an annular volume of a wellbore |
| CN101230261A (en) * | 2008-01-09 | 2008-07-30 | 韩炜 | New method for oil well yield increasing and hydrogen release active reagent components |
| CN101735789A (en) * | 2009-12-15 | 2010-06-16 | 华鼎鸿基采油技术服务（北京）有限公司 | Foam compound oil displacement agent and preparation method thereof |
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Effective date of registration: 20190428 Address after: 130012 Room 101, 4th Floor, No. 11 Residential Building, South Campus, Jilin University, Changchun High-tech Development Zone, Jilin Province Patentee after: Jilin Guantong Energy Technology Co., Ltd. Address before: 130012 No. 191 Chaoqun Street, Changchun High-tech Zone, Jilin Province Patentee before: Jilin Guantong Energy Science & Technology Co., Ltd. |