CN102627960B - Self-gas-generating foam fracturing fluid, its production method and application method - Google Patents
Self-gas-generating foam fracturing fluid, its production method and application method Download PDFInfo
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- CN102627960B CN102627960B CN201210079864.8A CN201210079864A CN102627960B CN 102627960 B CN102627960 B CN 102627960B CN 201210079864 A CN201210079864 A CN 201210079864A CN 102627960 B CN102627960 B CN 102627960B
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Abstract
Relating to the technical field of fracturing fluids used for petroleum exploitation, the invention discloses a self-gas-generating foam fracturing fluid, its production method and application method. The elf-gas-generating foam fracturing fluid is composed of a base solution and a reaction solution. The base solution consists of: hydrolyzed polyacrylamide, sodium nitrite, ammonium chloride, a foaming agent, a clay stabilizing agent, a bactericide and water. The reaction solution comprises, by weight part: aluminium trichloride, hydrochloric acid and water. The foam fracturing fluid has the advantages that: it releases a lot of inert gas during reaction, increases pressure of the reservoir stratum, has good discharge aiding ability and simultaneously forms a foam structure, substantially reduces filter loss property, and reduces the harm of the fracturing fluid on the reservoir stratum; it can be crosslinked under a weak acid condition (pH=4.0-6.0), thus avoiding alkali sensitivity and reducing the harm to the reservoir stratum. Compared with the technology of injection along with liquid nitrogen, the application method of the invention reduces construction cost, simplifies construction procedure, and avoids safety problems caused by liquid nitrogen storage.
Description
Technical field
the present invention relates to the fracturing liquid technical field for oil production, is a kind of natural occuring bubbles foam fracturing liquid and production method and using method.
Background technology
waterfrac treatment is one of most important well stimulation of well production increment, intensified injection of wells, raising Oil & Gas Productivity and recovery ratio.Fracturing liquid is the working fluid in waterfrac treatment transformation hydrocarbon zone process, and it plays a part transmission of pressure, form formation fracture, carry propping agent enters crack.The quality of fracturing liquid performance is to be related to the success or failure of pressing crack construction and the important factor that rear effect of increasing production is pressed in impact.
current in the fracturing reform process of the permeable quick hydrocarbon-bearing pool of low pressure and low permeability, the subject matter that the most frequently used hydroxypropyl guar-borax/organic boron fracturing fluid system exists: the one, the infringement that saturating hydrocarbon-bearing pool causes to low pressure and low permeability of fracturing liquid filtrate; The 2nd, fracturing liquid is crosslinked under alkaline condition, and alkaline sensitive reservoirs is caused to the quick infringement of alkali.When high pH working fluid enters after reservoir, be certain to react with the formation fines such as clay mineral, destroy the stability of Clay microstructure.In addition, the extraneous fluid of high pH enters after reservoir, also can cause the generation of inorganic scale, can damage reservoir equally, reduces Reservoir Seepage ability; The 3rd, reservoir pressure is low, fracturing fluid recovery (backflow) energy shortage, and the measure that take in current each oil field is mainly " liquid nitrogen companion note " technology, still " liquid nitrogen companion note " technology has increased the expense of pressure break, and liquid nitrogen is deposited the also larger safety problem of existence.
Summary of the invention
the invention provides a kind of natural occuring bubbles foam fracturing liquid and production method and using method, overcome prior art weak point, it can generate a large amount of gas under formation condition, and supercharging helps row; Can under mild acid conditions, be cross-linked, prevent the quick infringement of alkali again; There is low leak-off, low residue simultaneously, taking grittiness can be good, can significantly reduce fracturing liquid to reservoir damage.
one of technical scheme of the present invention is achieved like this: a kind of natural occuring bubbles foam fracturing liquid, and it is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:8 to 12; Wherein, this base fluid consists of by weight: 2 parts to 5 parts of hydro-polyacrylamides, 50 parts to 150 parts of Sodium Nitrites, 40 parts to 130 parts of ammonium chlorides, 5 parts to 15 parts of pore forming materials, 2 parts to 6 parts of clay stabilizers, 0.5 part to 2 parts, sterilant, 700 parts to 900 parts, water; This reaction solution consists of by weight: 5 parts to 15 parts of aluminum chlorides, 3 parts to 15 parts of hydrochloric acid, 700 parts to 800 parts, water.
to the further selection of one of technique scheme below or/and optimize:
said hydrolyzed polyacrylamide can be the polyacrylamide of molecular weight 800 to 2,500 ten thousand.
above-mentioned natural occuring bubbles foam fracturing liquid obtains in the steps below: the hydro-polyacrylamide of requirement, Sodium Nitrite, ammonium chloride, pore forming material, clay stabilizer, sterilant, water are mixed to get to base fluid; The aluminum chloride of requirement, hydrochloric acid, water are mixed to get to reaction solution.
two of technical scheme of the present invention is achieved like this: a kind of above-mentioned of the fracturing fluid production method of natural occuring bubbles foam is to carry out in the steps below: the hydro-polyacrylamide of requirement, Sodium Nitrite, ammonium chloride, pore forming material, clay stabilizer, sterilant, water are mixed to get to base fluid; The aluminum chloride of requirement, hydrochloric acid, water are mixed to get to reaction solution.
three of technical scheme of the present invention is achieved like this: a kind of above-mentioned of the fracturing fluid using method of natural occuring bubbles foam, it carries out in the steps below: in site of deployment, base fluid and reaction solution are squeezed into down-hole after natural occuring bubbles foam fracturing liquid and carried out fracturing operation for 100:8 to 12 is fully mixed to get by volume.
to three of technique scheme further selection below or/and optimize:
above-mentioned natural occuring bubbles foam fracturing liquid is applied in the waterfrac treatment technique of 20 ℃ to the 80 ℃ permeable quick hydrocarbon-bearing pools of low pressure and low permeability in temperature range.
the present invention has the following advantages:
when 1, this natural occuring bubbles foam fracturing liquid reacts, discharge a large amount of rare gas elementes, increased the pressure of reservoir, there is the fine row's of helping ability and form foamy structure simultaneously, greatly reduce leak-off, reduce fracturing liquid to reservoir damage.
, this natural occuring bubbles foam fracturing liquid is crosslinked under slightly acidic (pH=4.0 to 6.0) condition, prevented that alkali is quick, reduce reservoir damage.
, compare with " liquid nitrogen companion note " technology, reduced executive cost (liquid nitrogen pump vehicle expense, liquid nitrogen transportation tank car expense and liquid nitrogen expense), simplify working procedure (need not connect liquid nitrogen pump vehicle and liquid nitrogen tank car pipeline), avoided liquid nitrogen to deposit the safety problem of initiation.
Embodiment
the present invention is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical scheme of the invention described above and practical situation.
below in conjunction with embodiment, the present invention is done to further discussion:
embodiment 1, and this natural occuring bubbles foam fracturing liquid is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:8 to 12; Wherein, this base fluid consists of by weight: 2 parts to 5 parts of hydro-polyacrylamides, 50 parts to 150 parts of Sodium Nitrites, 40 parts to 130 parts of ammonium chlorides, 5 parts to 15 parts of pore forming materials, 2 parts to 6 parts of clay stabilizers, 0.5 part to 2 parts, sterilant, 700 parts to 900 parts, water; This reaction solution consists of by weight: 5 parts to 15 parts of aluminum chlorides, 3 parts to 15 parts of hydrochloric acid, 700 parts to 800 parts, water.
embodiment 2, and this natural occuring bubbles foam fracturing liquid is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:8; Wherein, this base fluid consists of by weight: 2 parts of hydro-polyacrylamides, 50 parts of Sodium Nitrites, 40 parts of ammonium chlorides, 5 parts of pore forming materials, 2 parts of clay stabilizers, 0.5 part, sterilant, 700 parts, water; This reaction solution consists of by weight: 5 parts of aluminum chlorides, 3 parts of hydrochloric acid, 700 parts, water.
embodiment 3, and this natural occuring bubbles foam fracturing liquid is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:12; Wherein, this base fluid consists of by weight: 5 parts of hydro-polyacrylamides, 150 parts of Sodium Nitrites, 130 parts of ammonium chlorides, 15 parts of pore forming materials, 6 parts of clay stabilizers, 2 parts, sterilant, 900 parts, water; This reaction solution consists of by weight: 15 parts of aluminum chlorides, 15 parts of hydrochloric acid, 800 parts, water.
embodiment 4, and this natural occuring bubbles foam fracturing liquid is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:8; Wherein, this base fluid consists of by weight: 5 parts of hydro-polyacrylamides, 50 parts of Sodium Nitrites, 130 parts of ammonium chlorides, 5 parts of pore forming materials, 6 parts of clay stabilizers, 0.5 part, sterilant, 900 parts, water; This reaction solution consists of by weight: 5 parts of aluminum chlorides, 15 parts of hydrochloric acid, 700 parts, water.
embodiment 5, and this natural occuring bubbles foam fracturing liquid is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:12; Wherein, this base fluid consists of by weight: 2 parts of hydro-polyacrylamides, 150 parts of Sodium Nitrites, 40 parts of ammonium chlorides, 15 parts of pore forming materials, 6 parts of clay stabilizers, 0.5 part, sterilant, 700 parts, water; This reaction solution consists of by weight: 15 parts of aluminum chlorides, 3 parts of hydrochloric acid, 800 parts, water.
embodiment 6, and this natural occuring bubbles foam fracturing liquid is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:12; Wherein, this base fluid consists of by weight: 5 parts of hydro-polyacrylamides, 150 parts of Sodium Nitrites, 40 parts of ammonium chlorides, 5 parts of pore forming materials, 6 parts of clay stabilizers, 2 parts, sterilant, 900 parts, water; This reaction solution consists of by weight: 5 parts of aluminum chlorides, 15 parts of hydrochloric acid, 800 parts, water.
embodiment 7, and this natural occuring bubbles foam fracturing liquid is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:8; Wherein, this base fluid consists of by weight: 2 parts of hydro-polyacrylamides, 50 parts of Sodium Nitrites, 130 parts of ammonium chlorides, 15 parts of pore forming materials, 2 parts of clay stabilizers, 0.5 part, sterilant, 700 parts, water; This reaction solution consists of by weight: 5 parts of aluminum chlorides, 15 parts of hydrochloric acid, 700 parts, water.
embodiment 8, and this natural occuring bubbles foam fracturing liquid is comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:8; Wherein, this base fluid consists of by weight: 5 parts of hydro-polyacrylamides, 150 parts of Sodium Nitrites, 130 parts of ammonium chlorides, 15 parts of pore forming materials, 2 parts of clay stabilizers, 0.5 part, sterilant, 900 parts, water; This reaction solution consists of by weight: 15 parts of aluminum chlorides, 3 parts of hydrochloric acid, 800 parts, water.
embodiment 9, are with the difference of above-described embodiment 1 to 8: the hydro-polyacrylamide of embodiment 9 is the polyacrylamide of molecular weight 800 to 2,500 ten thousand.
embodiment 10, are with the difference of above-described embodiment 1 to 8: the hydro-polyacrylamide of embodiment 10 is the polyacrylamide of molecular weight 800 or 2,500 ten thousand.
the natural occuring bubbles foam fracturing liquid of embodiment 11 above-described embodiments 1 to 10 obtains by following production method: the hydro-polyacrylamide of requirement, Sodium Nitrite, ammonium chloride, pore forming material, clay stabilizer, sterilant, water are mixed to get to base fluid; The aluminum chloride of requirement, hydrochloric acid, water are mixed to get to reaction solution.
the of the fracturing fluid using method of natural occuring bubbles foam of embodiment 11 above-described embodiments 1 to 10 is to carry out in the steps below: in site of deployment, base fluid and reaction solution are squeezed into down-hole after natural occuring bubbles foam fracturing liquid and carried out fracturing operation for 100:8 to 12 is fully mixed to get by volume.Sodium Nitrite in this natural occuring bubbles foam fracturing liquid and ammonium chloride are for reacting the chemical substance that gas is provided, and its chemical equation is:
NaNO
2
+NH
4
CL→N
2
↑+NaCL+H
2
O
in this reaction, the gas of every liter of natural occuring bubbles foam fracturing liquid release reaches 20 and rises to 50 liters, and pore forming material is the indispensable material for generation of stable foam, the rare gas element N that reaction produces
2
can form more low-density foam because pressure decreased cause the expansion of liquid and pore forming material, make liquid specific gravity in well wellbore lower than the pressure factor on stratum, in pit shaft, form negative pressure, impel liquid more effectively to discharge ground; Aluminum chloride in reaction solution for and hydro-polyacrylamide produce crosslinking reaction and form the frozen glue that viscosity is higher, hydrochloric acid provides hydrogen ion for the reaction of Sodium Nitrite and ammonium chloride.
embodiment 12, are with the difference of above-described embodiment 11: this natural occuring bubbles foam fracturing liquid is preferably applied in the waterfrac treatment technique of 20 ℃ to the 80 ℃ permeable quick hydrocarbon-bearing pools of low pressure and low permeability in temperature range.
in the present invention: pore forming material, clay stabilizer, sterilant are all to adopt the known conventional chemical industry additive in oil field.
gained natural occuring bubbles foam fracturing liquid of the present invention is carried out to soda acid detection, and it is slightly acidic, and pH is 4.0 to 6.0.
Claims (6)
1. a natural occuring bubbles foam fracturing liquid, is characterized in that being comprised of base fluid and reaction solution, and the volume ratio of base fluid and reaction solution is 100:8 to 12; Wherein, this base fluid consists of by weight: 2 parts to 5 parts of hydro-polyacrylamides, 50 parts to 150 parts of Sodium Nitrites, 40 parts to 130 parts of ammonium chlorides, 5 parts to 15 parts of pore forming materials, 2 parts to 6 parts of clay stabilizers, 0.5 part to 2 parts, sterilant, 700 parts to 900 parts, water; This reaction solution consists of by weight: 5 parts to 15 parts of aluminum chlorides, 3 parts to 15 parts of hydrochloric acid, 700 parts to 800 parts, water.
2. natural occuring bubbles foam fracturing liquid according to claim 1, is characterized in that hydro-polyacrylamide is the hydro-polyacrylamide of molecular weight 800 to 2,500 ten thousand.
3. natural occuring bubbles foam fracturing liquid according to claim 1 and 2, is characterized in that obtaining in the steps below: the hydro-polyacrylamide of requirement, Sodium Nitrite, ammonium chloride, pore forming material, clay stabilizer, sterilant, water are mixed to get to base fluid; The aluminum chloride of requirement, hydrochloric acid, water are mixed to get to reaction solution.
4. the of the fracturing fluid production method of natural occuring bubbles foam according to claim 1 and 2, is characterized in that carrying out in the steps below: the hydro-polyacrylamide of requirement, Sodium Nitrite, ammonium chloride, pore forming material, clay stabilizer, sterilant, water are mixed to get to base fluid; The aluminum chloride of requirement, hydrochloric acid, water are mixed to get to reaction solution.
5. one kind according to the of the fracturing fluid using method of natural occuring bubbles foam described in claim 1 or 2 or 3, it is characterized in that carrying out in the steps below: in site of deployment, base fluid and reaction solution are squeezed into down-hole after natural occuring bubbles foam fracturing liquid and carried out fracturing operation for 100:8 to 12 is fully mixed to get by volume.
6. the of the fracturing fluid using method of natural occuring bubbles foam according to claim 5, is characterized in that this natural occuring bubbles foam fracturing liquid is applied in the waterfrac treatment technique of 20 ℃ to the 80 ℃ permeable quick hydrocarbon-bearing pools of low pressure and low permeability in temperature range.
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| CN201210079864.8A CN102627960B (en) | 2012-03-23 | 2012-03-23 | Self-gas-generating foam fracturing fluid, its production method and application method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102994069B (en) * | 2012-12-03 | 2015-09-02 | 中国石油集团西部钻探工程有限公司 | The Low Damage carboxy-methyl hydroxy propyl guanidine glue foamed fracturing fluid of low permeability gas reservoirs and preparation method |
| CN103436245B (en) * | 2013-08-22 | 2016-08-17 | 中国石油集团川庆钻探工程有限公司 | synthetic polymer fracturing fluid for fracturing |
| CN103834376B (en) * | 2014-02-24 | 2016-08-17 | 中国石油大学(华东) | Natural occuring bubbles foam frozen glue profile control agent with oil field reinjection water preparation and preparation method and application |
| CN105238382A (en) * | 2015-10-13 | 2016-01-13 | 中国石油天然气股份有限公司 | Clean self-heating pressurized reservoir stratum modification liquid and preparation method thereof |
| CN107794031B (en) * | 2017-11-06 | 2020-10-16 | 北京九尊能源技术股份有限公司 | Nitrogen foam fracturing fluid system suitable for low-pressure lean water-containing coal bed gas well |
| CN108865104A (en) * | 2018-08-06 | 2018-11-23 | 广汉市华星新技术开发研究所（普通合伙） | A kind of slippery water |
| CN109762549B (en) * | 2019-01-28 | 2021-01-29 | 中国石油天然气股份有限公司 | Efficient self-gas-production foam fracturing fluid and construction method |
| CN112574734A (en) * | 2020-11-20 | 2021-03-30 | 西安力勘石油能源科技有限公司 | Self-generating thermal fracturing fluid and preparation and pumping method thereof |
| CN113355080A (en) * | 2021-06-03 | 2021-09-07 | 西南石油大学 | Multifunctional foam fracturing fluid and preparation method thereof |
| CN113684015A (en) * | 2021-08-25 | 2021-11-23 | 西南石油大学 | High-temperature-resistant high-salt self-generated foam fracturing fluid and preparation method thereof |
| CN114479820B (en) * | 2022-02-10 | 2023-09-01 | 四川申和新材料科技有限公司 | Self-heating composite foam fracturing fluid capable of being controlled in real time and field construction method |
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|---|---|---|---|---|
| US4846277A (en) * | 1987-06-05 | 1989-07-11 | Petroleo Brasileiro S.A. - Petrobras | Continuous process of hydraulic fracturing with foam |
| CN102061158A (en) * | 2010-11-26 | 2011-05-18 | 华鼎鸿基采油技术服务（北京）有限公司 | Foam reinforcing polymer oil displacement agent and method |
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2012
- 2012-03-23 CN CN201210079864.8A patent/CN102627960B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4846277A (en) * | 1987-06-05 | 1989-07-11 | Petroleo Brasileiro S.A. - Petrobras | Continuous process of hydraulic fracturing with foam |
| CN102061158A (en) * | 2010-11-26 | 2011-05-18 | 华鼎鸿基采油技术服务（北京）有限公司 | Foam reinforcing polymer oil displacement agent and method |
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Effective date of registration: 20201104 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Xibu Drilling Engineering Co.,Ltd. Address before: 834000 West drilling underground operation company, No. 34 Qianjin Road, the Xinjiang Uygur Autonomous Region, Karamay Patentee before: CNPC Xibu Drilling Engineering Co.,Ltd. |