CN115353225A - Compatibility method of gas field fracturing flow-back fluid and oil field reinjection water - Google Patents
Compatibility method of gas field fracturing flow-back fluid and oil field reinjection water Download PDFInfo
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- CN115353225A CN115353225A CN202210989850.3A CN202210989850A CN115353225A CN 115353225 A CN115353225 A CN 115353225A CN 202210989850 A CN202210989850 A CN 202210989850A CN 115353225 A CN115353225 A CN 115353225A
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- back fluid
- water
- fracturing flow
- reverse osmosis
- flow
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000012530 fluid Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 31
- 239000003381 stabilizer Substances 0.000 claims abstract description 18
- 239000003814 drug Substances 0.000 claims abstract description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 23
- 239000011575 calcium Substances 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 18
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 13
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 11
- 229910001424 calcium ion Inorganic materials 0.000 claims description 11
- 239000002352 surface water Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 229940120146 EDTMP Drugs 0.000 claims description 5
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000008398 formation water Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 abstract description 12
- 229910052791 calcium Inorganic materials 0.000 description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 11
- 229910052749 magnesium Inorganic materials 0.000 description 11
- 239000011777 magnesium Substances 0.000 description 11
- 230000008859 change Effects 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000668 effect on calcium Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a compatibility method of gas field fracturing flowback fluid and oil field reinjection water. The invention comprises the following steps: 1) The fracturing flow-back fluid enters a reverse osmosis system for reverse osmosis treatment; 3) Adding a water quality stabilizer into the fracturing flow-back fluid after reverse osmosis treatment; 4) And finally, matching the fracturing flow-back fluid with oilfield reinjection water. The invention adopts the method of treating the fracturing flow-back fluid by the equipment alone or the equipment and the medicament, improves the compatibility of the sewage, and can meet the requirement of improving the compatibility of the treated fracturing flow-back fluid with various types of water.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a compatibility method of gas field fracturing flow-back fluid and oil field reinjection water.
Background
Because of the purpose of increasing the yield of the oil field, a large number of reinjection wells are generated, surface water is basically reinjected, so that a large amount of surface water is lost, the surface ecology is damaged, the surface water loss is reduced by adopting fracturing eye drainage reinjection, and the local ecological balance can be protected.
At present, the conventional process is used for treatment, and the quality of reinjection water cannot reach the standard. The dense oil fracturing flow-back fluid has high oil content, simultaneously contains a large amount of suspended matters and bacteria, and has a high cod value. A large amount of clay and rock debris particles exist in the water, the water is expressed as emulsion, the stability is extremely high, and the water is difficult to be completely degraded by adopting a conventional process, so that the requirement of reinjection water quality cannot be met. The compatibility of the flowback liquid and the injected water is poor, and the reservoir is easily damaged. Relevant researches show that no matter what proportion is used for mixing injected water and fracturing flowback fluid, the permeability loss rate of the fracturing flowback fluid to a formation core is kept above 50 percent and can reach 72.89 at most.
Disclosure of Invention
The invention aims to solve the problem of compatibility of fracturing flow-back fluid reinjection in the background technology, and provides a method for matching gas field fracturing flow-back fluid with oil field reinjection water.
The technical solution of the invention is as follows: the invention relates to a compatibility method of gas field fracturing flowback fluid and oil field reinjection water, which is characterized by comprising the following steps of: the method comprises the following steps:
1) The fracturing flow-back fluid enters a reverse osmosis system for reverse osmosis treatment;
3) Adding a water quality stabilizer into the fracturing flow-back fluid after the reverse osmosis treatment;
4) And finally, matching the fracturing flow-back fluid with oilfield reinjection water.
Further, step 2) of treating the fracturing flow-back fluid subjected to reverse osmosis treatment in a resin conversion system is further included between the step 1) and the step 3),
further, the technological parameters of the reverse osmosis system in the step 1) are as follows: pressure before filtration: 0.1-0.6mpa, post-filtration pressure: 0.1-0.6mpa, pre-membrane pressure: 1.5-1.9mpa, pressure after membrane: 1.5-1.9mpa, concentrated water flow: 9-10m 3 H, water production flow: 14-20m 3 /h。
Further, after reverse osmosis treatment in the step 1), the content of calcium and magnesium ions in the fracturing flow-back fluid is less than 1500mg/l, and the turbidity is less than 1 degree.
Further, the water quality stabilizer in the step 2) adopts EDTMP and/or ATP medicament. The EDTMP can be dissociated into 8 positive and negative ions in an aqueous solution, can be chelated with a plurality of metal ions to form a macromolecular reticular complex with a plurality of monomer structures, is loosely dispersed in water, so that normal crystallization of calcium scale is destroyed, and the EDTMP has good scale inhibition effect on calcium sulfate and barium sulfate scale.
Furthermore, the resin conversion system adopts a resin conversion device combining parallel connection and series connection.
Further, the oilfield reinjection water is oilfield produced water, formation water or surface water.
The invention provides a compatibility method of gas field fracturing flow-back fluid and oil field reinjection water, which adopts the following technology: the calcium and magnesium content of the produced fracturing flow-back fluid is controlled by adopting a method of matching a reverse osmosis system and a resin conversion system, a sewage stabilizer is added to inhibit chemical reaction and reduce the generation of calcium and magnesium precipitates, so that the compatibility requirements of different water qualities are met, the fracturing flow-back fluid firstly enters the reverse osmosis system to remove most calcium and magnesium examples and then enters the resin conversion system, and calcium and magnesium ions of the fracturing flow-back fluid are removed again by an ion exchange principle. The resin conversion equipment adopts a mode of combining parallel connection and series connection, a treatment scheme of the resin conversion equipment is selected according to the characteristics of the reinjection water, and different treatment methods are adopted according to different reinjection water. A water quality stabilizer is added into a water outlet behind the resin conversion equipment, so that the stability of the sewage is improved, the chemical change of the sewage is reduced, and the scaling of calcium and magnesium ions is reduced. Therefore, the invention effectively solves the compatibility problem of the fracturing flow-back fluid reinjection oil field, reduces the generation of scaling substances, effectively protects the stratum, increases the stability of the sewage, improves the injectability of the sewage, and is beneficial to improving the water injection development effect. The treatment method can meet the compatibility of the fracturing flow-back fluid and different reinjection water, reasonably utilizes the fracturing flow-back fluid, achieves the aim of reusing industrial sewage, meets the environment-friendly requirement that the slurry does not fall to the ground, and reduces the pollution of the fracturing flow-back fluid to the environment.
Detailed Description
In the specific embodiment of the invention, three modes are adopted to respectively treat produced water of an oil field, stratum water or surface water, and the specific modes are as follows:
1) The fracturing flow-back fluid and the oil field produced water are treated by a method of treating by a reverse osmosis system and connecting the reverse osmosis system with a resin conversion device in series and then adding a water quality stabilizer.
2) The fracturing flow-back fluid and formation water are treated by a method of treating by a reverse osmosis system and adding a water quality stabilizer after the reverse osmosis system is connected with a resin conversion device in parallel.
3) The fracturing flow-back fluid and surface water are treated by a reverse osmosis system and then a water quality stabilizer is added.
Wherein, the reverse osmosis system and the resin conversion equipment are conventional equipment in the field. The technological parameters of the reverse osmosis system are as follows: pressure before filtration: 0.1-0.6mpa, post-filtration pressure: 0.1-0.6mpa, pre-membrane pressure: 1.5-1.9mpa, pressure after membrane: 1.5-1.9mpa, concentrated water flow: 9-10m 3 H, water production flow: 14-20m3/h. The water quality stabilizer adopts EDTMP and/or ATP medicament.
The concrete application examples of the three modes of the invention are as follows:
the first embodiment is as follows: the fracturing flow-back fluid is compatible with the oilfield produced water of Hao Guping, the fracturing flow-back fluid is treated by a method of adding a water quality stabilizer after being treated by a reverse osmosis system and connected in series with a resin conversion device, and the concentration of calcium and magnesium ions changes after standing for 24 hours.
Table 1: mixing two kinds of water in different proportions and standing for 24 hours to change the concentration of calcium and magnesium
As shown in Table 1, the calcium and magnesium content of the produced fracturing flow-back fluid is controlled by adopting a method of serially matching a reverse osmosis system and resin conversion equipment, the calcium and magnesium content of the fracturing flow-back fluid is controlled at 100mg/L, a sewage stabilizer is added, compatibility results are met at any proportion, the calcium and magnesium ion change rate is less than 3%, and the generation of scale formation is greatly reduced.
The second embodiment: the fracturing flow-back fluid and the formation water are compatible, the treatment is carried out by adopting a method that a reverse osmosis system is used for treatment, the reverse osmosis system is connected with a resin conversion device in parallel, then a water quality stabilizer is added for treatment, and the calcium and magnesium ion concentration changes after standing for 24 hours.
Table 2: the two kinds of water are mixed in different proportions and then are kept stand for 24 hours to change the concentration of calcium and magnesium
As shown in Table 2, the calcium and magnesium content of the produced fracturing flow-back fluid is controlled by adopting a method of parallel matching of a reverse osmosis system and resin conversion equipment, the calcium and magnesium content of the fracturing flow-back fluid is controlled to be 1000mg/L, a sewage stabilizer is added, compatibility results are met in any proportion, the calcium and magnesium ion change rate is less than 3%, and the generation of scale formation is greatly reduced.
Example three: the fracturing flow-back fluid and surface water are compatible, the fracturing flow-back fluid and the surface water are compatible, a reverse osmosis system is adopted for treatment, then a water quality stabilizer is added for treatment, and the calcium and magnesium ion concentration changes after the fracturing flow-back fluid and the surface water are kept stand for 24 hours.
Table 3: the two kinds of water are mixed in different proportions and then are kept stand for 24 hours to change the concentration of calcium and magnesium
As shown in Table 3, the reverse osmosis system is adopted to treat the fracturing flow-back fluid, the calcium and magnesium content of the fracturing flow-back fluid is controlled to be 500mg/L by adding the water quality stabilizer, the compatibility result is met at any proportion by adding the sewage stabilizer, the calcium and magnesium ion change rate is less than 3 percent, and the generation of scale formation is greatly reduced
The invention discusses that the compatibility of sewage can be greatly improved when the gas field fracturing flowback fluid is treated by adopting a method of independently treating equipment or compounding the equipment and a medicament. Under experimental conditions, the calcium-magnesium ion water-injection agent is mixed with oilfield flooding water in different proportions, and the change rate of the calcium-magnesium ion concentration is less than 10 percent of compatibility requirement. The treatment method of the equipment composite medicament has better effect, and the change rate of the concentration of calcium and magnesium ions reaches about 2 percent. More importantly, the gas field fracturing flow-back fluid and Hao Guping united station oil field produced water, formation water and surface water have the advantages that the stability of mixed sewage in different proportions is improved, the injectability is better, and the improvement of water injection development effect is facilitated.
It should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or substituted with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
The present invention and the technical contents not specifically described in the above embodiments are the same as the prior art.
The present invention is not limited to the above-described embodiments, and the present invention can be implemented with the above-described advantageous effects.
Claims (7)
1. A compatibility method of gas field fracturing flow-back fluid and oil field reinjection water is characterized by comprising the following steps: the method comprises the following steps:
1) The fracturing flow-back fluid enters a reverse osmosis system for reverse osmosis treatment;
3) Adding a water quality stabilizer into the fracturing flow-back fluid after reverse osmosis treatment;
4) And finally, matching the fracturing flow-back fluid with oilfield reinjection water.
2. The compatibility method of the gas field fracturing flow-back fluid and oil field reinjection water according to claim 1, characterized in that: and 2) the fracturing flow-back fluid after reverse osmosis treatment enters a resin conversion system for treatment between the step 1) and the step 3).
3. The compatibility method of the gas field fracturing flow-back fluid and oil field reinjection water according to claim 1, characterized in that: the technological parameters of the reverse osmosis system in the step 1) are as follows: pressure before filtration: 0.1-0.6mpa, post-filtration pressure: 0.1-0.6mpa, pre-membrane pressure: 1.5-1.9mpa, pressure after membrane: 1.5-1.9mpa, concentrated water flow: 9-10m 3 H, water production flow: 14-20m 3 /h。
4. The compatibility method of the gas field fracturing flow-back fluid and the oil field reinjection water according to claim 2, characterized in that: after the reverse osmosis treatment in the step 1), the content of calcium and magnesium ions in the fracturing flow-back fluid is less than 1500mg/l, and the turbidity is less than 1 degree.
5. The compatibility method of the gas field fracturing flow-back fluid and the oil field reinjection water according to claim 4, characterized in that: the water quality stabilizer in the step 2) adopts EDTMP and/or ATP medicament.
6. The compatibility method of the gas field fracturing flow-back fluid and the oil field reinjection water according to claim 5, characterized in that: the resin conversion system adopts a resin conversion device combining parallel connection and series connection.
7. The compatibility method of the gas field fracturing flow-back fluid and oil field reinjection water according to claim 6, characterized in that: the oilfield reinjection water is oilfield produced water, formation water or surface water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210989850.3A CN115353225A (en) | 2022-08-18 | 2022-08-18 | Compatibility method of gas field fracturing flow-back fluid and oil field reinjection water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210989850.3A CN115353225A (en) | 2022-08-18 | 2022-08-18 | Compatibility method of gas field fracturing flow-back fluid and oil field reinjection water |
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| Publication Number | Publication Date |
|---|---|
| CN115353225A true CN115353225A (en) | 2022-11-18 |
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Family Applications (1)
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| CN202210989850.3A Pending CN115353225A (en) | 2022-08-18 | 2022-08-18 | Compatibility method of gas field fracturing flow-back fluid and oil field reinjection water |
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| Country | Link |
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| CN (1) | CN115353225A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110253634A1 (en) * | 2009-10-20 | 2011-10-20 | David Soane | Treatment of wastewater |
| CN102585793A (en) * | 2011-12-31 | 2012-07-18 | 中国海洋大学 | Method for preparing flooding polymer solution based on membrane softening technique |
| CN103313943A (en) * | 2010-12-01 | 2013-09-18 | 威立雅水处理技术北美公司 | Method for recovering gas from shale reservoirs and purifying resulting produced water |
| CN111499040A (en) * | 2020-04-26 | 2020-08-07 | 克拉玛依翎昊科技有限责任公司 | Oil field fracturing flowback fluid reinjection treatment method |
| CN212954585U (en) * | 2019-12-27 | 2021-04-13 | 上海忠茂环保工程有限公司 | Skid-mounted oil-gas field fracturing anti-drainage purifying device |
| CN114873820A (en) * | 2022-05-27 | 2022-08-09 | 四川环科美能环保科技有限公司 | Treatment process of shale gas fracturing flowback fluid |
-
2022
- 2022-08-18 CN CN202210989850.3A patent/CN115353225A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110253634A1 (en) * | 2009-10-20 | 2011-10-20 | David Soane | Treatment of wastewater |
| CN103313943A (en) * | 2010-12-01 | 2013-09-18 | 威立雅水处理技术北美公司 | Method for recovering gas from shale reservoirs and purifying resulting produced water |
| CN102585793A (en) * | 2011-12-31 | 2012-07-18 | 中国海洋大学 | Method for preparing flooding polymer solution based on membrane softening technique |
| CN212954585U (en) * | 2019-12-27 | 2021-04-13 | 上海忠茂环保工程有限公司 | Skid-mounted oil-gas field fracturing anti-drainage purifying device |
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Non-Patent Citations (1)
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| 张兴儒主编: "《中国页岩气开发环境影响评价和监管制度研究》", 电子科技大学出版社, pages: 143 - 144 * |
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Application publication date: 20221118 |