CN102942914A - Hydrogenation heat gas chemical yield increasing solution component for low-permeability carbonate reservoir oil well - Google Patents
Hydrogenation heat gas chemical yield increasing solution component for low-permeability carbonate reservoir oil well Download PDFInfo
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- CN102942914A CN102942914A CN2012104799758A CN201210479975A CN102942914A CN 102942914 A CN102942914 A CN 102942914A CN 2012104799758 A CN2012104799758 A CN 2012104799758A CN 201210479975 A CN201210479975 A CN 201210479975A CN 102942914 A CN102942914 A CN 102942914A
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Abstract
The invention belongs to the technical field of oil exploitation, and particularly relates to a hydrogenation heat gas chemical yield increasing solution component capable of being used for increasing productivity of a low-permeability carbonate reservoir oil well. The solution component comprises first solution, second solution and third solution, the mass ratio of the first solution, the second solution and the third solution is 1:1:3, the first solution comprises urea CO(NH2)2, sodium nitrite NaNO2, hydrazine N2H4 and water H2O, the second solution comprises aluminum chloride AlCl3, sodium hydride NaH, ammonium chloride NH4Cl and tetrachloroethylene C2Cl4, and the third solution comprises hydrochloric acid HCl, methenamine (CH2)6N4 and alkylphenol ethoxylate C9H19C6H4O(C2H4O)nH. Compared with an acidizing and fracturing process, a hydrogenation heat gas chemical method is simple in process, has the advantage of combination of heat recovery, fracturing and acidizing, is long in yield increasing duration and high in recovery ratio, and can be applied to carbonate oil reservoir exploitation.
Description
Technical field
The invention belongs to technical field of petroleum extraction, be specifically related to a kind of solution component that can be used for improving the heat from hydrogenation chemistry volume increase of low-permeability carbonate reservoir oil well productivity.
Background technology
Carbonatite is very important reservoir rock, accounts for 20% of world's sedimentogeneous rock total area, and its oil and gas reserves accounts for 50% of world's total reserves.China had successively obtained the great discovery of carbonatite oil gas resource in areas such as Tarim Basin, Sichuan in recent years.Carbonate rock hydrocarbon reservoir has the characteristics such as dark, that reservoir properties is poor, nonuniformity is strong, per-well production is low of burying, and acid-fracture technology is the common method that carbonate reservoir is transformed.
Acid fracturing refers in the acidification technique that is enough under the pressure that presses off formation crack, stratum or open the stratum primary fracture stratum be clamp-oned acid solution.Acidizing fracturing process mainly is divided into prepad acid fracturing fracturing technology and fracturing liquid and acid solution and replaces injection technology.The former is by inject the non-reacted preposition fracturing liquid of high viscosity to the stratum, on the basis that presses off formation crack, stratum, realizes pressure break by injecting acid solution.The latter alternately injects a kind of method that realizes acid fracturing by high viscosity fracturing fluid and acid solution, and its main advantage is that sphere of action is large, the acid-etched fracture penetration range is long, acid liquid loss is low etc.By the acid fracturing transformation, can improve the seepage flow condition of immediate vicinity of wellbore, improve the single well yield.The zone thickness that the acid fracturing one-stop operation is processed is unsuitable blocked up, and formation temperature is unsuitable too high.In addition, need to employ large-scale implement, construction is complicated, and cost is expensive, and some throw out easily causes secondary pollution.
Summary of the invention
The solution component that the purpose of this invention is to provide a kind of heat from hydrogenation chemistry volume increase that improves low-permeability carbonate reservoir oil well productivity, specifically for rate of permeation 10 * 10
-3～50 * 10
-3μ m
2The hyposmosis carbonate rock stratum.This solution component improves single well productivity by improving the carbonate rock stratum rate of permeation.
The heat from hydrogenation chemistry method for increasing yield of carbonate reservoir oil well be utilize between the working solution be injected in the well and the chemical reaction between working fluid and rock stratum to the physics chemical action of adjacent to oil well area, thereby improve the rate of permeation of immediate vicinity of wellbore, improve single well productivity.Compare with acidizing fracturing process, heat from hydrogenation chemistry method technique is simple, possesses advantage, volume increase longer duration, recovery ratio that thermal recovery, pressure break and acidifying combine higher, can use in the Carbonate Reservoir exploitation.
The present invention is achieved in that
At first, prepare three kinds of working solutions (No. 1 solution, No. 2 solution, No. 3 solution), require No. 1 solution and No. 2 liquor capacity sums less than the volume of hyposmosis oil well reaction zone.Space (see figure 1) in reaction zone refers to from the artificial bottom of a well to perforation district upper surface sleeve pipe is farthest calculated by chemical reaction and to be guaranteed that front two kinds of solution can fully react.
No. 1 solution calculates the urea CO (NH by 22～26% by quality and 100%
2)
2, 50～55% Sodium Nitrite NaNO
2, 10～13% hydrazine N
2H
4(chemical industry company limited far away buys in the permanent industry in Beijing) and 9～15% water H
2O forms;
The preparation method of No. 1 solution:
Calculate 1.1 press solution quality and 100%, at first add 22～26% urea in the container;
1.2 pour afterwards 9～15% water into, uniform stirring 5～10 minutes;
1.3 add again 50～55% Sodium Nitrite in the solution that obtains, uniform stirring 5～10 minutes;
1.4 add at last 10～13% hydrazine, fully stir 5～10 minutes, thereby make solution No. 1.
No. 2 solution calculate the aluminum chloride AlCl by 50～54% by quality and 100%
3, 17～23% sodium hydride NaH, 9～11% ammonium chloride NH
4Cl and 16～20% zellon C
2Cl
4(a purple chemical reagent work buys in Shanghai) forms;
The preparation method of No. 2 solution:
Calculate 2.1 press solution quality and 100%, at first add 50～54% aluminum chloride in the container;
2.2 topple over afterwards 16～20% zellon in the container, uniform stirring 5～10 minutes;
2.3 add again 17～23% sodium hydride in the solution that obtains, uniform stirring 5～10 minutes;
2.4 add 9～11% ammonium chloride in the most backward container, fully stir 5～10 minutes, thereby make solution No. 2.
No. 3 solution calculate by quality and 100%, and the massfraction by 97.5～98% is 25% hydrochloric acid HCl, 0.5～1.5% urotropin (CH
2)
6N
4(westernization instrument Science and Technology Ltd. buys in Beijing) and 1～2% alkylphenol polyoxyethylene C
9H
19C
6H
4O(C
2H
4O)
nH(buys in the Zhejiang University chemical plant) form.
The preparation method of No. 3 solution:
Calculate 3.1 press solution quality and 100%, at first add 0.5～1.5% urotropin in the container;
3.2 add again 1～2% alkylphenol polyoxyethylene in the container;
3.2 topple over 97.5～98% massfraction in the most backward container and be 25% hydrochloric acid, thereby make solution No. 3.
After 3 kinds of working solutions prepare, at first No. 1 solution and No. 2 solution are injected in the well by oil pipe successively, No. 1 solution and No. 2 solution sink to the artificial bottom of a well by the self gravitation effect, and two kinds of solution begin to occur chemical reaction in the shaft bottom.After fully reacting through 12～14 hours two kinds of working solutions, pump into No. 3 solution (No. 1 solution, No. 2 solution and No. 3 solution in mass ratio 1:1:3 are thrown in) by oil pipe.The effect of urotropin is corrosion inhibitor, and alkylphenol polyoxyethylene is tensio-active agent.
No. 1 solution and No. 2 solution react in the shaft bottom, and reaction equation is as follows:
NaH+H
2O=NaOH+H
2+Q ①
2AlCl
3+3CO(NH
2)
2+6NaNO
2→2Al(OH)
3+6NaCl+6N
2+3CO
2+H
2O+Q ②
NH
4Cl+NaNO
2→N
2+NaCl+H
2O+Q ③
1. 2. 3. the reaction discharge a large amount of High Temperature High Pressure hydrogen, nitrogen and carbon dioxide, produce simultaneously large calorimetric.Gas is carrying energy and is passing the well-cased perforating district with very high speed and enter into nearly well band oil reservoir, melt in organic tamper intensifications such as the paraffin bituminous matter of heat effect deposit in oil reservoir duct, immediate vicinity of wellbore, and under condition of high voltage when temperature is higher than 200 ℃, macromolecular substance generation catalytic cracking and the pyrolytic reaction such as paraffin bituminous matter under the hydrogen effect, higher hydrocabon is changed into light ends, thereby reached the purpose of nearly well band de-plugging viscosity reduction.
When the conversion zone temperature reached 250～260 ℃, hydrazine generation pyrolysis discharged gas and heat.
3N
2H
4=4NH
3+N
2+Q ④
High temperature and high pressure gas continuously can make it produce new crack to the thermal shocking effect of nearly well band rock stratum, is communicated with the oil and gas flow passage, reduces seepage resistance, increases drainage area, thereby has improved the rate of permeation of nearly well band rock stratum.
As seen, after the thermochemistry effect of overheated gas to nearly well band rock stratum, can effectively realize the de-plugging of hole inside, rock stratum, and can improve the porosity and permeability of rock stratum.
Through 12～14 hours, after No. 1 solution and No. 2 solution fully react, pump into solution No. 3 by oil pipe, carry out oil well acidation and process.
After acid solution entered into ore bed, following reaction occured in the main component of meeting and rock stratum:
CaCO
3+2HCl=CaCl
2+H
2O+CO
2 ⑤
MgCO
3+2HCl=MgCl
2+H
2O+CO
2 ⑥
Process by oil well acidation, can further improve the rate of permeation of immediate vicinity of wellbore, and then improve single well productivity.Should be immediately after the acidification eject reaction product is counter by the pump group, such as untimely discharge reaction product, can reduce treatment effect.
Description of drawings
Fig. 1: structure of oil well schematic diagram;
Wherein: 1 well head; 2 oil pipes; 3 sleeve pipes; 4 perfs; 5 artificials bottom of a well; 6 oil reservoirs;
Embodiment
Embodiment 1: No. 1 oil well heat from hydrogenation of Sichuan oilfield chemistry volume increase test
The geologic condition of No. 1 oil well and correlation parameter: reservoir lithology is mainly grey dolomite, grey matter Yun Yan, cloud matter limestone; Average pore 9.7%, rate of permeation 46.2 * 10
-3μ m
2Casing diameter
Artificial bottom of a well 6648m; Perforation scope 6526～6599m; Stimulation work production fluid day before yesterday 1.6t, wherein day produce oil 0.3t; Can draw the reaction zone volume by above data is 1464L.Prepare No. 1 solution 780kg, No. 2 solution 780kg, No. 3 solution 2340kg.
No. 1 solution comprises: urea CO (NH
2)
2, Sodium Nitrite NaNO
2, hydrazine N
2H
4, water H
2O, separately shared mass percent: 22%, 50%, 13%, 15%; The quality of each component is respectively: urea 171.6kg, Sodium Nitrite 390kg, hydrazine 101.4kg, water 117kg.
No. 2 solution comprises: aluminum chloride AlCl
3, sodium hydride NaH, ammonium chloride NH
4Cl, zellon C
2Cl
4, shared mass percent separately: 50%, 23%, 11%, 16%.The quality of each component is respectively: aluminum chloride 390kg, sodium hydride 179.4kg, ammonium chloride 85.8kg, zellon 124.8kg.
No. 3 solution comprises: hydrochloric acid HCl, urotropin (CH
2)
6N
4, alkylphenol polyoxyethylene C
9H
19C
6H
4O (C
2H
4O) nH; Shared mass percent separately: 97.5%, 0.5%, 2%.The quality of each component is respectively: hydrochloric acid 2281.5kg, urotropin 11.7kg, alkylphenol polyoxyethylene 46.8kg.
On January 20th, 2012 was injected into No. 1 solution and No. 2 solution in the well by oil pipe successively, and the closing well reaction pumps into solution No. 3 after 12 hours again in well, and question response resumed production after 12 hours.
After heat from hydrogenation chemistry well stimulation processing, the day production fluid of No. 3 oil wells is not brought up to 10.4t and 2.21t by original 1.6t and 0.3t with the daily output oil content, to effective producing days 165 days on July 20th, 2012, accumulative total increases 267.2 tons of oil, at present continuous and effective still.
Embodiment 2: No. 2 oil well heat from hydrogenation of Sichuan oilfield chemistry volume increase test
The geologic condition of No. 2 oil wells and correlation parameter: reservoir lithology is mainly grey dolomite, grey matter Yun Yan, cloud matter limestone; Average pore 7.4%, rate of permeation 11.8 * 10
-3μ m
2Casing diameter
Artificial bottom of a well 6801m; Perforation scope 6702～6783m; Stimulation work production fluid day before yesterday 1.2t, wherein day produce oil 0.1t; Can draw the reaction zone volume by above data is 1188L.Prepare No. 1 solution 715kg, No. 2 solution 715kg, No. 3 solution 2145kg.
No. 1 solution comprises: urea CO (NH
2)
2, Sodium Nitrite NaNO
2, hydrazine N
2H
4, water H
2O, separately shared mass percent: 26%, 55%, 10%, 9%; The quality of each component is respectively: urea 185.9kg, Sodium Nitrite 393.25kg, hydrazine 71.5kg, water 64.35kg.
No. 2 solution comprises: aluminum chloride AlCl
3, sodium hydride NaH, ammonium chloride NH
4Cl, zellon C
2Cl
4, shared mass percent separately: 54%, 17%, 9%, 20%.The quality of each component is respectively: aluminum chloride 386.1kg, sodium hydride 121.55kg, ammonium chloride 64.35kg, zellon 143kg.
No. 3 solution comprises: hydrochloric acid HCl, urotropin (CH
2)
6N
4, alkylphenol polyoxyethylene C
9H
19C
6H
4O (C
2H
4O) nH; Shared mass percent separately: 98%, 1%, 1%.The quality of each component is respectively: hydrochloric acid 2102.1kg, urotropin 21.45kg, alkylphenol polyoxyethylene 21.45kg.
On January 20th, 2012 was injected into No. 1 solution and No. 2 solution in the well by oil pipe successively, and the closing well reaction pumps into solution No. 3 after 12 hours again in well, and question response resumed production after 12 hours.
After processing by the well stimulation of heat from hydrogenation chemistry, No. 3 oil wells day production fluid and the daily output oil content do not bring up to 3.5t and 0.75t by original 1.2t and 0.1t, to effective producing days 157 days on July 20th, 2012, accumulative total increases oily 86.7 tons, at present continuous and effective still.
Embodiment 3: No. 3 oil well heat from hydrogenation of Sichuan oilfield chemistry volume increase test
The geologic condition of No. 3 oil wells and correlation parameter: reservoir lithology is mainly grey dolomite, grey matter Yun Yan, cloud matter limestone; Average pore 8.1%, rate of permeation 26.4 * 10
-3μ m
2Casing diameter
Artificial bottom of a well 6231.5m; Perforation scope 6103～6197m; Stimulation work production fluid day before yesterday 2.0t, wherein day produce oil 0.18t; Can draw the reaction zone volume by above data is 1542L.Prepare No. 1 solution 910kg, No. 2 solution 910kg, No. 3 solution 2730kg.
No. 1 solution comprises: urea CO (NH
2)
2, Sodium Nitrite NaNO
2, hydrazine N
2H
4, water H
2O, separately shared mass percent: 24%, 53%, 11%, 12%; The quality of each component is respectively: urea 218.4kg, Sodium Nitrite 482.3kg, hydrazine 100.1kg, water 109.2kg.
No. 2 solution comprises: aluminum chloride AlCl
3, sodium hydride NaH, ammonium chloride NH
4Cl, zellon C
2Cl
4, shared mass percent separately: 52%, 20%, 10%, 18%.The quality of each component is respectively: aluminum chloride 473.2kg, sodium hydride 182kg, ammonium chloride 91kg, zellon 163.8kg.
No. 3 solution comprises: hydrochloric acid HCl, urotropin (CH
2)
6N
4, alkylphenol polyoxyethylene C
9H
19C
6H
4O (C
2H
4O) nH; Shared mass percent separately: 97.5%, 1.5%, 1%.The quality of each component is respectively: hydrochloric acid 2661.75kg, urotropin 40.95kg, alkylphenol polyoxyethylene 27.3kg.
On January 20th, 2012 was injected into No. 1 solution and No. 2 solution in the well by oil pipe successively, and the closing well reaction pumps into solution No. 3 after 12 hours again in well, and question response resumed production after 12 hours.
After heat from hydrogenation chemistry well stimulation processing, the day production fluid of No. 3 oil wells is not brought up to 8.7t and 1.45t by original 2.0t and 0.18t with the daily output oil content, to effective producing days 169 days on July 20th, 2012, accumulative total increases 148.5 tons of oil, at present continuous and effective still.
Claims (3)
1. a heat from hydrogenation chemistry that is used for the low-permeability carbonate reservoirs oil well is increased production the solution component, it is characterized in that: by No. 1 solution of mass ratio 1:1:3, No. 2 solution and No. 3 solution compositions, No. 1 solution calculates the urea CO (NH by 22～26% by quality and 100%
2)
2, 50～55% Sodium Nitrite NaNO
2, 10～13% hydrazine N
2H
4With 9～15% water H
2O forms; No. 2 solution calculate the aluminum chloride AlCl by 50～54% by quality and 100%
3, 17～23% sodium hydride NaH, 9～11% ammonium chloride NH
4Cl and 16～20% zellon C
2Cl
4Form; No. 3 solution calculate by quality and 100%, and the massfraction by 97.5～98% is 25% hydrochloric acid HCl, 0.5～1.5% urotropin (CH
2)
6N
4With 1～2% alkylphenol polyoxyethylene C
9H
19C
6H
4O(C
2H
4O)
nH forms.
2. a kind of heat from hydrogenation chemistry for the low-permeability carbonate reservoirs oil well as claimed in claim 1 is increased production the solution component, it is characterized in that: be that No. 1 solution and No. 2 solution are sunk to the artificial bottom of a well by the self gravitation effect, two kinds of solution begin to occur chemical reaction in the shaft bottom; After 12～14 hours, pump into solution No. 3 by oil pipe again.
3. a kind of heat from hydrogenation chemistry for the low-permeability carbonate reservoirs oil well as claimed in claim 1 is increased production the solution component, and it is characterized in that: the volume sum of No. 1 solution and No. 2 solution is less than the volume of oil well reaction zone.
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| CN104342105A (en) * | 2013-07-31 | 2015-02-11 | 普拉德研究及开发股份有限公司 | Viscosified acid fluid and method for use thereof |
| 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 |
| CN106321053A (en) * | 2015-07-01 | 2017-01-11 | 中国石油化工股份有限公司 | Oil and gas well production increasing method |
| CN112358863A (en) * | 2021-01-12 | 2021-02-12 | 山东圣哲石油装备有限公司 | Chemical yield increasing liquid for low-permeability oil layer and yield increasing method |
| CN112430459A (en) * | 2021-01-28 | 2021-03-02 | 山东奥士德石油技术有限公司 | Preparation method of high-temperature-resistant thick oil viscosity reducer |
| US11208877B2 (en) | 2020-04-03 | 2021-12-28 | Saudi Arabian Oil Company | Removal of water blockage in tight gas reservoir using thermochemical fluids |
| CN114517086A (en) * | 2022-01-26 | 2022-05-20 | 中国石油大学(北京) | Multifunctional fracturing fluid composition, multifunctional fracturing fluid, and preparation method and application thereof |
| CN115298285A (en) * | 2020-03-12 | 2022-11-04 | 沙特阿拉伯石油公司 | Systems, methods, and compositions for reservoir stimulation diversion using thermochemicals |
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| CN104342105A (en) * | 2013-07-31 | 2015-02-11 | 普拉德研究及开发股份有限公司 | Viscosified acid fluid and method for use thereof |
| CN106321053A (en) * | 2015-07-01 | 2017-01-11 | 中国石油化工股份有限公司 | Oil and gas well production increasing method |
| CN106321053B (en) * | 2015-07-01 | 2019-01-01 | 中国石油化工股份有限公司 | A kind of well production increment method |
| 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 |
| CN115298285A (en) * | 2020-03-12 | 2022-11-04 | 沙特阿拉伯石油公司 | Systems, methods, and compositions for reservoir stimulation diversion using thermochemicals |
| CN115298285B (en) * | 2020-03-12 | 2023-07-28 | 沙特阿拉伯石油公司 | Systems, methods, and compositions for reservoir stimulation diversion using thermochemical substances |
| US11208877B2 (en) | 2020-04-03 | 2021-12-28 | Saudi Arabian Oil Company | Removal of water blockage in tight gas reservoir using thermochemical fluids |
| CN112358863A (en) * | 2021-01-12 | 2021-02-12 | 山东圣哲石油装备有限公司 | Chemical yield increasing liquid for low-permeability oil layer and yield increasing method |
| CN112358863B (en) * | 2021-01-12 | 2023-07-21 | 山东圣哲石油装备有限公司 | Chemical yield increasing liquid and method for low-permeability oil layer |
| CN112430459A (en) * | 2021-01-28 | 2021-03-02 | 山东奥士德石油技术有限公司 | Preparation method of high-temperature-resistant thick oil viscosity reducer |
| CN114517086A (en) * | 2022-01-26 | 2022-05-20 | 中国石油大学(北京) | Multifunctional fracturing fluid composition, multifunctional fracturing fluid, and preparation method and application thereof |
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Inventor after: Han Wei Inventor after: Han Weixi Morenko Alexei Zhou Liang Li Zixuan Inventor after: Zhou Liang Inventor after: Li Zixuan Inventor before: Simono Aleksey Inventor before: Han Wei Inventor before: Zhou Liang Inventor before: Li Zixuan |
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Effective date of registration: 20190429 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. |