CN112282678A - Treatment method of shale gas oil-based drilling cutting solid waste - Google Patents
Treatment method of shale gas oil-based drilling cutting solid waste Download PDFInfo
- Publication number
- CN112282678A CN112282678A CN202011147438.4A CN202011147438A CN112282678A CN 112282678 A CN112282678 A CN 112282678A CN 202011147438 A CN202011147438 A CN 202011147438A CN 112282678 A CN112282678 A CN 112282678A
- Authority
- CN
- China
- Prior art keywords
- solid waste
- oil
- organic polymer
- water
- seaweed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002910 solid waste Substances 0.000 title claims abstract description 172
- 238000005520 cutting process Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000005553 drilling Methods 0.000 title claims abstract description 41
- 241001474374 Blennius Species 0.000 claims abstract description 106
- 229920000620 organic polymer Polymers 0.000 claims abstract description 101
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 66
- 239000004576 sand Substances 0.000 claims abstract description 45
- 239000007800 oxidant agent Substances 0.000 claims abstract description 36
- 230000001590 oxidative effect Effects 0.000 claims abstract description 34
- 239000003208 petroleum Substances 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 14
- 238000009270 solid waste treatment Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 129
- 239000003921 oil Substances 0.000 claims description 121
- 235000019198 oils Nutrition 0.000 claims description 109
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 51
- 238000003756 stirring Methods 0.000 claims description 45
- 238000006243 chemical reaction Methods 0.000 claims description 35
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 27
- 238000003860 storage Methods 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 26
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 24
- 238000000926 separation method Methods 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 17
- 238000002386 leaching Methods 0.000 claims description 17
- 230000020477 pH reduction Effects 0.000 claims description 17
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- 235000019476 oil-water mixture Nutrition 0.000 claims description 10
- 150000007524 organic acids Chemical class 0.000 claims description 9
- 208000005156 Dehydration Diseases 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000003763 carbonization Methods 0.000 abstract description 3
- 238000004821 distillation Methods 0.000 abstract description 3
- 238000000197 pyrolysis Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000000053 physical method Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 32
- 239000002351 wastewater Substances 0.000 description 12
- 239000007790 solid phase Substances 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 8
- 241000195493 Cryptophyta Species 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000002283 diesel fuel Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 159000000011 group IA salts Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
- E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/068—Arrangements for treating drilling fluids outside the borehole using chemical treatment
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a method for treating shale gas oil-based drilling cutting solid waste, which is characterized in that oil-water-solid waste layering is realized by using a seaweed organic polymer separating agent so as to realize oil recovery; the seaweed organic polymer oxidant is used for forming advanced oxidation reaction, so that the harmless treatment of solid waste is realized, a high-temperature heating distillation technology or an anaerobic pyrolysis carbonization technology is not adopted, the energy consumption is saved, and the odor and peculiar smell are not generated in the treatment; the treatment method disclosed by the invention separates mud and sand in solid waste by a physical method, and the sand grains are processed and improved in sphericity by using the seaweed organic polymer curing agent, have better lubricity, temperature resistance and corrosion resistance, and can be used as fracturing sand for petroleum production, so that the pressure of standard-reaching post-treatment or landfill of solid waste treatment can be reduced, and another way of resource utilization is provided for enterprises.
Description
Technical Field
The invention belongs to the technical field of environmental management, and particularly relates to a method for treating shale gas oil-based drilling cutting solid waste.
Background
The oil-based drilling cuttings are solid wastes generated in the exploitation process of oil wells and gas wells and have complex components. In the oil and gas production process, a plurality of organic additives are used, and the complexity of the oil-based drilling cutting solid waste components is increased. Generally, the oil content of the solid waste varies, most of the solid waste is about 9% -14%, the water content is high, and alkaline salt, heavy metal and organic pollutants are main harmful components. Because of large amount of solid wastes, if the solid wastes are not effectively treated and disposed, farmland and land pollution and surface water and underground water pollution can be caused, the ecological environment can be seriously damaged, the normal growth of crops is influenced, and the health of people is threatened.
The treatment of oil sludge and solid waste produced in oil exploitation has a plurality of advanced treatment technologies internationally and a plurality of economic and effective treatment methods in China. Shale gas exploitation started late in China, scientists have been exploring various economic, effective, energy-saving and environment-friendly technical methods for treating solid waste and sewage and wastewater generated in shale gas exploitation operation, and have developed various economic and effective treatment methods. The current technology for oil separation and solid waste treatment of shale gas oil-based drilling cuttings is developed basically according to the technical methods of oil separation and solid waste treatment of petroleum oil sludge, and besides some original and traditional simple treatment technologies, the more used technical methods mainly comprise a hot distillation technology, a rotary kiln technology and an oxygen-free state pyrolysis carbonization technology. The technologies can effectively realize oil recovery and reduce the oil content of solid waste to below 0.3 percent, reach the standard of solid waste safe disposal, and play a very important role in solving the problem of safe disposal of shale gas oil-based drilling cuttings. Meanwhile, the technologies have some defects and shortcomings, mainly including the following aspects:
high temperature treatment is required, energy is consumed, and carbon emission is generated. If the waste gas is treated at high temperature and discharged improperly, air pollution and strong peculiar smell are caused, and the life and health of surrounding residents are influenced. After the solid waste after high-temperature treatment is baked, sintered or pyrolyzed, the solid waste is generally difficult to be used as a building material auxiliary raw material or a road building auxiliary material and has other ways of resource utilization. On the other hand, the soil resources in China are very precious, and with the continuous development of shale gas, the amount of shale gas oil-based cuttings solid wastes is increased continuously, and the landfill sites of the solid wastes are increasingly deficient. Therefore, the invention provides an energy-saving and environment-friendly technical method, which realizes the recovery of partial oil of solid waste according to the needs, reduces the oil content and organic pollutants of the solid waste, treats heavy metals in the solid waste, and then carries out resource utilization of the solid waste according to the needs, for example, the treated sand grains are used as fracturing sand for petroleum production after being processed and ball-shaped modified.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for treating shale gas oil-based drilling cutting solid waste, which adopts a seaweed organic polymer separating agent to separate oil, water and solid waste to realize oil recovery, adopts a seaweed organic polymer oxidant and hydrogen peroxide to form advanced oxidation to perform harmless treatment on the solid waste, and adopts a seaweed organic polymer curing agent to prepare separated sand grains into fracturing sand for petroleum production through processing.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for treating shale gas oil-based drilling cutting solid waste, comprising the following steps:
(1) oil-water solid waste layering: adding water into the oil-based drilling cutting solid waste, then adding the seaweed organic polymer separating agent, stirring, standing, performing separation reaction to form different layers of oil water and solid waste, and repeatedly adding the seaweed organic polymer separating agent for performing separation reaction according to the content of components in the treated solid waste until the oil water and the solid waste are obviously layered;
(2) oil recovery: pumping the oil-water layer into an oil-water mixture storage container, standing for 60-90min, and separating oil from water after stabilization so as to recover oil;
(3) solid waste treatment: after the step (2) is finished, discharging the mixture of the solid waste and the residual water in the step (1) into a solid waste treatment container, adding hydrogen peroxide or organic acid and seaweed organic polymer oxidant, carrying out advanced oxidation reaction, then carrying out dehydration treatment, detecting the content of components in the solid waste, judging whether the hydrogen peroxide or the organic acid and the seaweed organic polymer oxidant are repeatedly added according to the content until the detection meets the standard, sending the obtained solid waste into a storage yard for standing reaction, and standing reaction for not less than 28 days;
(4) resource utilization: separating mud and sand in the solid waste after the reaction in the step (3), separating sand grains, adding a seaweed organic polymer curing agent for reaction to obtain modified sand grains, and preparing the modified sand grains into fracturing sand for petroleum production.
According to the treatment method, in the step (1), the algae organic polymer separating agent is adopted to realize obvious layering of oil-water solid waste in a treatment container, oil-water separation is carried out through the step (2), oil recovery is completed, the algae organic polymer separating agent is repeatedly added for separation reaction according to different component contents in the oil-based drilling cutting solid waste until the oil-water solid waste is obviously layered, in the step (3), heavy metals and organic pollutants in the solid waste are reduced through advanced oxidation, the seaweed organic polymer oxidant and hydrogen peroxide or organic acid are adopted as the treatment agent, so that harmless treatment of the solid waste is realized, and in the step (4), the seaweed organic polymer curing agent is added to prepare fracturing sand for petroleum production through mechanical processing.
The method realizes oil-water separation, solid waste harmless treatment and resource utilization, can be used separately or comprehensively, can omit the steps (1) and (2) when only the harmless treatment is needed, can omit the step (3) when the harmless treatment is not needed, and can omit the step (4) when the resource utilization is not needed.
Further, the addition amount of the seaweed organic polymer separating agent in the step (1) is 1-3% of the total volume of the treated oil-based drill cutting solid waste and water, preferably, the stirring time is 30-45min, and the standing time is 60-90 min.
Further, the seaweed organic polymer separating agent in the step (1) is prepared by the following method: stirring and crushing the deep sea seaweed, adding 3% sulfuric acid by mass for acidification, adding 35% sodium hydroxide by mass for leaching, filtering, and adding 30% deionized water to obtain the seaweed organic polymer separating agent.
Further, the pH value of the seaweed organic polymer separating agent is 6-9.
Further, the oil-water separation in the step (2) adopts an oil-water separator for separation, so that oil recovery is realized, or clear water is filled into the oil-water layer to raise the water level so that the oil layer naturally overflows and is discharged, so that oil recovery is realized.
Further, in the step (3), the adding amount of the hydrogen peroxide or the organic acid is 10-40% of the total volume of the solid waste and residual water mixture, and the adding amount of the seaweed organic polymer oxidant is 1-5% of the total volume of the solid waste and residual water mixture.
Further, the organic acid is citric acid or oxalic acid.
Further, the seaweed organic polymer oxidant is prepared by the following method: stirring and crushing the deep sea seaweed, adding 35% by mass of sulfuric acid for acidification reaction, adding 35% by mass of sodium hydroxide for leaching and filtering to obtain the seaweed organic polymer oxidant.
Further, the pH value of the seaweed organic polymer oxidant is 10.5-11.5.
Further, the seaweed organic polymer curing agent in the step (4) is prepared by the following method: stirring and crushing the deep sea seaweed, adding dilute sulfuric acid with the mass fraction of 3% for acidification reaction, adding sodium hydroxide with the mass fraction of 3% for leaching and filtering, and adding 1-20% of organic silicon to obtain the seaweed organic polymer curing agent.
Furthermore, the volume of the seaweed organic polymer curing agent is 2-10% of the total volume of the sand grains.
Further, the pH value of the seaweed organic polymer curing agent is 6-9.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the treatment method of the shale gas oil-based drilling cutting solid waste, oil-water-solid waste layering is realized by using the seaweed organic polymer separating agent, so that oil recovery is realized; the seaweed organic polymer oxidant is used for forming advanced oxidation reaction, so that the harmless treatment of solid waste is realized, a high-temperature heating distillation technology or an anaerobic pyrolysis carbonization technology is not adopted, the energy consumption is saved, and the odor and peculiar smell are not generated in the treatment;
(2) the processing method of the invention separates the mud and sand in the solid waste by a physical method, and the sand grains are processed and improved in sphericity by using the seaweed organic polymer curing agent, have better lubricity, temperature resistance and corrosion resistance, and can be used as fracturing sand for petroleum production, thus reducing the pressure of standard-reaching post-treatment or landfill of the solid waste treatment and providing another resource utilization approach for enterprises;
(3) the treatment method is suitable for the operation of a large centralized treatment base and the operation of a dispersive treatment base, has stronger mobility and flexibility, can be completely or partially suitable for the oil separation and harmless treatment of other oil-containing solid wastes in the petroleum and gas industry, and provides a plurality of choices for the solid waste treatment method in the petroleum and gas industry.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a process flow diagram of a treatment method of shale gas oil-based drilling cutting solid waste.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 shows a process flow chart of the shale gas oil-based drilling cutting solid waste treatment method of the invention.
Example 1
Firstly, 10kg of shale gas-oil-based drilling cutting solid waste is placed in a reaction vessel, wherein the solid phase content of the oil-based drilling cutting solid waste is 76%, the water content is 7%, the oil (diesel oil) content is 14%, the main components of the solid phase are Ba, Si, S, Fe, Zn and the like, and the NaCl content is about 1.5%.
The method for treating shale gas oil-based drilling cutting solid waste comprises the following steps:
(1) oil-water solid waste layering: adding water into the solid waste of the oil-based drilling cuttings, covering the surface layer of the solid waste with the water, fully stirring the solid waste and the water to fully mix the solid waste and the water to form a slurry mixture, and then adding a seaweed organic polymer separating agent, wherein the seaweed organic polymer separating agent is prepared by the following method: stirring and crushing deep sea seaweed, adding 3% by mass of sulfuric acid for acidification, adding 35% by mass of sodium hydroxide for leaching, filtering, and adding 30% by mass of deionized water to obtain the seaweed organic polymer separating agent, wherein the pH value of the seaweed organic polymer separating agent is 6-9, the adding amount of the seaweed organic polymer separating agent is 1% of the total volume of the oil-based drilling cutting solid waste to be treated and water, stirring by using an electric stirrer for 30min, stopping stirring, standing for 60min, stirring again for 30min, stopping stirring, standing for 24h in a container, carrying out separation reaction, forming obvious different layers in the container at the moment, wherein the top layer is oil, the middle layer is water, and the bottom layer is solid waste;
(2) oil recovery: slowly pumping an oil layer and a water layer to an oil-water mixing processor, sending the bottom solid waste to a solid waste processor, standing the oil-water mixture in a container for 60min, separating oil and water in the oil-water mixture by using an oil-water separator, sending the oil into a recovered oil storage container, sending the water into a waste water temporary storage container, and sending the water in the temporary storage container into the solid waste processor;
(3) solid waste treatment: adding a small amount of clear water into a mixture of residual water and solid waste in a solid waste processor, covering a solid waste surface layer with the water, adding 35% of hydrogen peroxide and a seaweed organic polymer oxidant, stirring for 15min, standing for 60min, and carrying out advanced oxidation reaction, wherein the adding amount of the hydrogen peroxide is 10% of the total volume of the mixture of the solid waste and the residual water, the adding amount of the seaweed organic polymer oxidant is 1% of the total volume of the mixture of the solid waste and the residual water, and the seaweed organic polymer oxidant is prepared by the following method: stirring and crushing deep sea seaweed, adding 35% by mass of sulfuric acid for acidification reaction, adding 35% by mass of sodium hydroxide for leaching and filtering to obtain the seaweed organic polymer oxidant, wherein the pH value of the seaweed organic polymer oxidant is 10.5-11.5, performing high-grade oxidation reaction, performing centrifugal dehydration, allowing water to enter a temporary waste water storage container, conveying solid waste to a solid waste storage container, and standing for 28 days;
(4) resource utilization: separating mud and sand in the solid waste after the reaction in the step (3), separating sand grains, adding an alga organic polymer curing agent, wherein the volume of the alga organic polymer curing agent is 6% of the total volume of the sand grains, and the alga organic polymer curing agent is prepared by the following method: stirring and crushing deep sea seaweed, adding dilute sulfuric acid with the mass fraction of 3% for acidification reaction, adding sodium hydroxide with the mass fraction of 3% for leaching and filtering, and adding 1% of organic silicon to obtain the modified sand grains, wherein the pH value of the seaweed organic polymer curing agent is 6-9, and the modified sand grains are prepared into fracturing sand for petroleum production.
Through detection, the proportion of the recovered oil is about 71 percent of the oil content of the shale gas-oil-based drilling cuttings. And (3) detecting after the treated solid waste is stood for 28 days, wherein the oil content is lower than 0.3 percent. The wastewater can be recycled after being purified in a temporary storage container. The sand grains separated from the solid waste have good lubricity, good temperature resistance and good corrosion resistance, and after being subjected to sphericity improvement, the sand grains have basic conditions for fracturing sand for petroleum production.
Example 2
Firstly, 10kg of shale gas-oil-based drilling cutting solid waste is placed in a reaction vessel, wherein the solid phase content of the oil-based drilling cutting solid waste is 76%, the water content is 7%, the oil (diesel oil) content is 14%, the main components of the solid phase are Ba, Si, S, Fe, Zn and the like, and the NaCl content is about 1.5%.
The method for treating shale gas oil-based drilling cutting solid waste comprises the following steps:
(1) oil-water solid waste layering: adding water into the solid waste of the oil-based drilling cuttings, covering the surface layer of the solid waste with the water, fully stirring the solid waste and the water to fully mix the solid waste and the water to form a slurry mixture, and then adding a seaweed organic polymer separating agent, wherein the seaweed organic polymer separating agent is prepared by the following method: stirring and crushing deep sea seaweed, adding 3% by mass of sulfuric acid for acidification, adding 35% by mass of sodium hydroxide for leaching, filtering, and adding 30% by mass of deionized water to obtain the seaweed organic polymer separating agent, wherein the pH value of the seaweed organic polymer separating agent is 6-9, the adding amount of the seaweed organic polymer separating agent is 2% of the total volume of the oil-based drilling cutting solid waste to be treated and water, stirring by using an electric stirrer for 37.5min, stopping stirring, standing for 75min, stirring again for 37.5min, stopping stirring, standing in a container for 24h, carrying out separation reaction, forming obvious different layers in the container at the moment, wherein the top layer is oil, the middle layer is water, and the bottom layer is solid waste;
(2) oil recovery: slowly pumping an oil layer and a water layer to an oil-water mixing processor, sending the bottom solid waste to a solid waste processor, standing the oil-water mixture in a container for 75min, separating oil and water in the oil-water mixture by using an oil-water separator, sending the oil into a recovered oil storage container, sending the water into a waste water temporary storage container, and sending the water in the temporary storage container into the solid waste processor;
(3) solid waste treatment: adding a small amount of clear water into a mixture of residual water and solid waste in a solid waste processor, covering a solid waste surface layer with the water, adding 35% of hydrogen peroxide and a seaweed organic polymer oxidant, stirring for 15min, standing for 60min, and carrying out advanced oxidation reaction, wherein the adding amount of the hydrogen peroxide is 25% of the total volume of the mixture of the solid waste and the residual water, the adding amount of the seaweed organic polymer oxidant is 3% of the total volume of the mixture of the solid waste and the residual water, and the seaweed organic polymer oxidant is prepared by the following method: stirring and crushing deep sea seaweed, adding 35% by mass of sulfuric acid for acidification reaction, adding 35% by mass of sodium hydroxide for leaching and filtering to obtain the seaweed organic polymer oxidant, wherein the pH value of the seaweed organic polymer oxidant is 10.5-11.5, performing high-grade oxidation reaction, performing centrifugal dehydration, allowing water to enter a temporary waste water storage container, conveying solid waste to a solid waste storage container, and standing for 30 days;
(4) resource utilization: separating mud and sand in the solid waste after the reaction in the step (3), separating sand grains, adding an alga organic polymer curing agent, wherein the volume of the alga organic polymer curing agent is 2 percent of the total volume of the sand grains, and the alga organic polymer curing agent is prepared by the following method: stirring and crushing deep sea seaweed, adding dilute sulfuric acid with the mass fraction of 3% for acidification reaction, adding sodium hydroxide with the mass fraction of 3% for leaching and filtering, and adding 10% of organic silicon to obtain the modified sand grains, wherein the pH value of the seaweed organic polymer curing agent is 6-9, and the modified sand grains are prepared into fracturing sand for petroleum production.
Through detection, the proportion of the recovered oil is about 65% of the oil content of the shale gas-oil-based drilling cuttings. And (3) detecting after the treated solid waste is stood for 30 days, wherein the oil content is lower than 0.3%. The wastewater can be recycled after being purified in a temporary storage container. The sand grains separated from the solid waste have good lubricity, good temperature resistance and good corrosion resistance, and after being subjected to sphericity improvement, the sand grains have basic conditions for fracturing sand for petroleum production.
Example 3
Firstly, 10kg of shale gas-oil-based drilling cutting solid waste is placed in a reaction vessel, wherein the solid phase content of the oil-based drilling cutting solid waste is 76%, the water content is 7%, the oil (diesel oil) content is 14%, the main components of the solid phase are Ba, Si, S, Fe, Zn and the like, and the NaCl content is about 1.5%.
The method for treating shale gas oil-based drilling cutting solid waste comprises the following steps:
(1) oil-water solid waste layering: adding water into the solid waste of the oil-based drilling cuttings, covering the surface layer of the solid waste with the water, fully stirring the solid waste and the water to fully mix the solid waste and the water to form a slurry mixture, and then adding a seaweed organic polymer separating agent, wherein the seaweed organic polymer separating agent is prepared by the following method: stirring and crushing deep sea seaweed, adding 3% by mass of sulfuric acid for acidification, adding 35% by mass of sodium hydroxide for leaching, filtering, and adding 30% of deionized water to obtain the seaweed organic polymer separating agent, wherein the pH value of the seaweed organic polymer separating agent is 6-9, the adding amount of the seaweed organic polymer separating agent is 3% of the total volume of the oil-based drilling cutting solid waste to be treated and water, stirring by using an electric stirrer for 45min, stopping stirring, standing for 90min, stirring again for 45min, stopping stirring, standing in a container for 24h, carrying out separation reaction, forming obvious different layers in the container at the moment, wherein the top layer is oil, the middle layer is water, and the bottom layer is solid waste;
(2) oil recovery: slowly pumping an oil layer and a water layer to an oil-water mixing processor, sending the bottom solid waste to a solid waste processor, standing the oil-water mixture in a container for 90min, separating oil and water in the oil-water mixture by using an oil-water separator, sending the oil into a recovered oil storage container, sending the water into a waste water temporary storage container, and sending the water in the temporary storage container into the solid waste processor;
(3) solid waste treatment: adding a small amount of clear water into a mixture of residual water and solid waste in a solid waste processor, covering the surface layer of the solid waste by the water, adding 35% citric acid and a seaweed organic polymer oxidant, stirring for 15min, standing for 60min, and carrying out a high-grade oxidation reaction, wherein the adding amount of the citric acid is 40% of the total volume of the mixture of the solid waste and the residual water, and the adding amount of the seaweed organic polymer oxidant is 5% of the total volume of the mixture of the solid waste and the residual water, and the seaweed organic polymer oxidant is prepared by the following method: stirring and crushing deep sea seaweed, adding 35% by mass of sulfuric acid for acidification reaction, adding 35% by mass of sodium hydroxide for leaching and filtering to obtain the seaweed organic polymer oxidant, wherein the pH value of the seaweed organic polymer oxidant is 10.5-11.5, performing high-grade oxidation reaction, performing centrifugal dehydration, allowing water to enter a temporary waste water storage container, conveying solid waste to a solid waste storage container, and standing for 30 days;
(4) resource utilization: separating mud and sand in the solid waste after the reaction in the step (3), separating sand grains, adding a seaweed organic polymer curing agent, wherein the volume of the seaweed organic polymer curing agent is 10 percent of the total volume of the sand grains, and the seaweed organic polymer curing agent is prepared by the following method: stirring and crushing deep sea seaweed, adding dilute sulfuric acid with the mass fraction of 3% for acidification reaction, adding sodium hydroxide with the mass fraction of 3% for leaching, filtering and adding 20% of organic silicon to obtain the modified sand grains, wherein the pH value of the seaweed organic polymer curing agent is 6-9, and preparing the modified sand grains into fracturing sand for petroleum production.
Through detection, the proportion of the recovered oil is about 73% of the oil content of the shale gas-oil-based drilling cuttings. And (3) detecting after the treated solid waste is stood for 30 days, wherein the oil content is lower than 0.3%. The wastewater can be recycled after being purified in a temporary storage container. The sand grains separated from the solid waste have good lubricity, good temperature resistance and good corrosion resistance, and after being subjected to sphericity improvement, the sand grains have basic conditions for fracturing sand for petroleum production.
Example 4
10kg of shale gas oil-based drilling cutting solid waste is placed in a reaction vessel, wherein the solid phase content of the oil-based drilling cutting solid waste is 86%, the water content is 4%, the oil content is less than 8%, and the main components of the solid phase comprise Ba, Si, S, Fe, Zn and the like. The solid waste has non-uniform particle size and low sand content, and is in a clay state.
The method for treating shale gas oil-based drilling cutting solid waste comprises the following steps:
(1) oil-water solid waste layering: adding water into the solid waste of the oil-based drilling cuttings, covering the surface layer of the solid waste with the water, fully stirring the solid waste and the water to fully mix the solid waste and the water to form a slurry mixture, and then adding a seaweed organic polymer separating agent, wherein the seaweed organic polymer separating agent is prepared by the following method: stirring and crushing deep sea algae, adding 3% by mass of sulfuric acid for acidification, adding 35% by mass of sodium hydroxide for leaching, filtering, and adding 30% of deionized water to obtain the algae organic polymer separating agent, wherein the pH value of the algae organic polymer separating agent is 6-9, the adding amount of the algae organic polymer separating agent is 3% of the total volume of the oil-based drilling cutting solid waste to be treated and water, stirring is stopped by using an electric stirrer for 45min, standing is carried out for 90min, and the solid waste and the water form primary layering, but the water layer is turbid, and the oil layer is not formed. Adding water again, wherein the water adding amount is the same as the volume of the solid waste, adding a seaweed organic polymer separating agent, the adding amount is 2% of the total volume of the solid waste and the water to be treated, stirring for 45min, stopping stirring, standing for 90min, obviously layering a solid waste layer and an oil-water mixing layer, adding a seaweed organic polymer separating agent, the adding amount is 1% of the total volume of the solid waste and the water, stirring for 15min, standing for 24h in a container, and carrying out separation reaction, wherein at the moment, obviously different layers are formed in the container, the top layer is oil, the middle layer is water, and the bottom layer is the solid waste;
(2) oil recovery: slowly pumping an oil layer and a water layer to an oil-water mixing processor, sending the bottom solid waste to a solid waste processor, standing the oil-water mixture in a container for 90min, separating oil and water in the oil-water mixture by using an oil-water separator, sending the oil into a recovered oil storage container, sending the water into a waste water temporary storage container, and sending the water in the temporary storage container into the solid waste processor;
(3) solid waste treatment: adding a small amount of clear water into a mixture of residual water and solid waste in a solid waste processor, covering a solid waste surface layer with the water, adding 35% oxalic acid and a seaweed organic polymer oxidant, stirring for 15min, standing for 60min, and carrying out a high-grade oxidation reaction, wherein the adding amount of the oxalic acid is 40% of the total volume of the mixture of the solid waste and the residual water, the adding amount of the seaweed organic polymer oxidant is 5% of the total volume of the mixture of the solid waste and the residual water, and the seaweed organic polymer oxidant is prepared by the following method: stirring and crushing deep sea seaweed, adding 35% by mass of sulfuric acid for acidification reaction, adding 35% by mass of sodium hydroxide for leaching and filtering to obtain the seaweed organic polymer oxidant, wherein the pH value of the seaweed organic polymer oxidant is 10.5-11.5, performing high-grade oxidation reaction, performing centrifugal dehydration, allowing water to enter a temporary waste water storage container, conveying solid waste to a solid waste storage container, and standing for 30 days. And sampling, detecting and analyzing, wherein the oil content of the solid waste is reduced to 0.3 percent, and the set target is achieved.
Because the solid waste has low sand grain proportion, the sand grain separation and the sand grain processing into the fracturing sand have no economic value, and therefore, the resource utilization step is not implemented.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method for treating shale gas oil-based drilling cutting solid waste is characterized by comprising the following steps:
(1) oil-water solid waste layering: adding water into the oil-based drilling cutting solid waste, then adding the seaweed organic polymer separating agent, stirring, standing, performing separation reaction to form different layers of oil water and solid waste, and repeatedly adding the seaweed organic polymer separating agent for performing separation reaction according to the content of components in the treated solid waste until the oil water and the solid waste are obviously layered;
(2) oil recovery: pumping the oil-water layer into an oil-water mixture storage container, standing for 60-90min, and separating oil from water after stabilization so as to recover oil;
(3) solid waste treatment: after the step (2) is finished, discharging the mixture of the solid waste and the residual water in the step (1) into a solid waste treatment container, adding hydrogen peroxide or organic acid and seaweed organic polymer oxidant, carrying out advanced oxidation reaction, then carrying out dehydration treatment, detecting the content of components in the solid waste, judging whether the hydrogen peroxide or the organic acid and the seaweed organic polymer oxidant are repeatedly added according to the content until the detection meets the standard, sending the obtained solid waste into a storage yard for standing reaction, and standing reaction for not less than 28 days;
(4) resource utilization: separating mud and sand in the solid waste after the reaction in the step (3), separating sand grains, adding a seaweed organic polymer curing agent for reaction to obtain modified sand grains, and preparing the modified sand grains into fracturing sand for petroleum production.
2. The method for treating shale gas-oil based drill cuttings solid waste according to claim 1, wherein the amount of the seaweed organic polymer separating agent added in the step (1) is 1-3% of the total volume of the treated oil based drill cuttings solid waste and water, preferably, the stirring time is 30-45min, and the standing time is 60-90 min.
3. The method for treating shale gas-oil based drill cuttings solid waste according to claim 1, wherein the seaweed organic polymer separating agent in the step (1) is prepared by the following method: stirring and crushing the deep sea seaweed, adding 3% sulfuric acid by mass for acidification, adding 35% sodium hydroxide by mass for leaching, filtering, and adding 30% deionized water to obtain the seaweed organic polymer separating agent.
4. The method for treating shale gas oil based drill cuttings solid waste according to claim 3, wherein the pH value of the seaweed organic polymer separating agent is 6-9.
5. The method for treating the shale gas-oil-based drilling cutting solid waste according to any one of claims 1 to 4, wherein the oil-water separation in the step (2) is performed by using an oil-water separator to realize oil recovery, or clear water is filled into an oil-water layer to raise the water level so as to discharge the oil layer naturally, so that the oil recovery is realized.
6. The method for treating shale gas-oil based drill cuttings solid waste according to claim 1, wherein in the step (3), the addition amount of hydrogen peroxide or organic acid is 10-40% of the total volume of the solid waste and residual water mixture, the addition amount of seaweed organic polymer oxidant is 1-5% of the total volume of the solid waste and residual water mixture, and preferably, the organic acid is citric acid or oxalic acid.
7. The method for treating shale gas oil based drill cuttings solid waste according to claim 1 or 5, wherein the seaweed organic polymer oxidizer is prepared by the following method: stirring and crushing the deep sea seaweed, adding 35% by mass of sulfuric acid for acidification reaction, adding 35% by mass of sodium hydroxide for leaching and filtering to obtain the seaweed organic polymer oxidant.
8. The method for treating shale gas oil based drill cuttings solid waste as claimed in claim 7, wherein the seaweed organic polymer oxidizer has a pH of 10.5-11.5.
9. The method for treating shale gas-oil based drill cuttings solid waste according to claim 1, wherein the seaweed organic polymer curing agent in the step (4) is prepared by the following method: stirring and crushing the deep sea seaweed, adding dilute sulfuric acid with the mass fraction of 3% for acidification reaction, adding sodium hydroxide with the mass fraction of 3% for leaching and filtering, and adding 1-20% of organic silicon to obtain the seaweed organic polymer curing agent.
10. The method for treating shale gas oil based drill cuttings solid waste according to claim 9, wherein the pH of the seaweed organic polymer curing agent is 6-9, and preferably, the volume of the seaweed organic polymer curing agent is 2-10% of the total volume of sand grains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011147438.4A CN112282678B (en) | 2020-10-23 | 2020-10-23 | Treatment method of shale gas oil-based drilling cutting solid waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011147438.4A CN112282678B (en) | 2020-10-23 | 2020-10-23 | Treatment method of shale gas oil-based drilling cutting solid waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112282678A true CN112282678A (en) | 2021-01-29 |
| CN112282678B CN112282678B (en) | 2023-02-17 |
Family
ID=74423852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011147438.4A Active CN112282678B (en) | 2020-10-23 | 2020-10-23 | Treatment method of shale gas oil-based drilling cutting solid waste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112282678B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776780A (en) * | 2016-03-07 | 2016-07-20 | 南京乾庚新材料科技有限公司 | Shale gas well drilling waste-oil-based mud curing material |
| CN107556126A (en) * | 2017-08-01 | 2018-01-09 | 浙江海洋大学 | A kind of soil improvement material for being used to improve coastal soil |
| CN108587669A (en) * | 2018-05-18 | 2018-09-28 | 武汉理工大学 | A kind of shale gas oil-based drill cuttings resource utilization method |
| CN110681692A (en) * | 2019-11-15 | 2020-01-14 | 斯蒂芬·Y·周 | Method for repairing heavy metal contaminated soil |
| CN110819659A (en) * | 2019-11-15 | 2020-02-21 | 斯蒂芬·Y·周 | Preparation method of seaweed organic polymer |
| CN110813990A (en) * | 2019-11-15 | 2020-02-21 | 斯蒂芬·Y·周 | Advanced oxidation and packaging fixation treatment method for solid waste incineration fly ash |
| CN111608606A (en) * | 2020-06-02 | 2020-09-01 | 重庆长能环境科技有限公司 | Oil removing method for shale gas-oil-based drilling cuttings |
-
2020
- 2020-10-23 CN CN202011147438.4A patent/CN112282678B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776780A (en) * | 2016-03-07 | 2016-07-20 | 南京乾庚新材料科技有限公司 | Shale gas well drilling waste-oil-based mud curing material |
| CN107556126A (en) * | 2017-08-01 | 2018-01-09 | 浙江海洋大学 | A kind of soil improvement material for being used to improve coastal soil |
| CN108587669A (en) * | 2018-05-18 | 2018-09-28 | 武汉理工大学 | A kind of shale gas oil-based drill cuttings resource utilization method |
| CN110681692A (en) * | 2019-11-15 | 2020-01-14 | 斯蒂芬·Y·周 | Method for repairing heavy metal contaminated soil |
| CN110819659A (en) * | 2019-11-15 | 2020-02-21 | 斯蒂芬·Y·周 | Preparation method of seaweed organic polymer |
| CN110813990A (en) * | 2019-11-15 | 2020-02-21 | 斯蒂芬·Y·周 | Advanced oxidation and packaging fixation treatment method for solid waste incineration fly ash |
| CN111608606A (en) * | 2020-06-02 | 2020-09-01 | 重庆长能环境科技有限公司 | Oil removing method for shale gas-oil-based drilling cuttings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112282678B (en) | 2023-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107363083B (en) | Five-layer covering strong reduction in-situ mineralization restoration method | |
| CN101363311B (en) | Technological process for comprehensive treatment for waste drilling fluid following drill for oil-gas field | |
| CN105107824B (en) | A kind of oilfield drilling discarded object method for innocent treatment | |
| CN107459336B (en) | A method of fired brick is prepared using water-based drilling drilling cuttings | |
| CN102180641A (en) | Method and process for high strength curing of drilling waste | |
| CN105621823A (en) | Treatment process for oil-contained sludge generated by oilfield wastewater treatment | |
| CN105906319B (en) | A kind of method that haydite is prepared using riverway sludge | |
| CN102432148A (en) | Method for treating oil sludge of tertiary recovery | |
| CN112919879A (en) | Method for preparing high-strength ceramsite from oil sludge | |
| CN109201022A (en) | Composite magnetic adsorption material preparation based on oily sludge and its minimizing technology to Heavy Metals in Waters | |
| CN109181807A (en) | A kind of preparation method of sewage sludge biomass environment-friendly fuel | |
| CN101967033A (en) | Decrement, resource protection and innocent treatment method for tank bottom oil sludge | |
| CN112282678B (en) | Treatment method of shale gas oil-based drilling cutting solid waste | |
| CN101053799A (en) | Preparation of demulsifying agent for processing mud and sand containing oil and its processing method | |
| CN113121026A (en) | Well drilling rock debris treatment method based on physical properties of portland cement | |
| CN204848472U (en) | Well drilling discarded object does not fall to ground innocent treatment system | |
| CN111533427A (en) | Method for classifying and treating natural gas drilling waste | |
| CN108793964B (en) | Ancient building ceramic prepared from municipal sludge and preparation method thereof | |
| CN102432074A (en) | Bayer process and Bayer sintering process aluminum oxide red mud zero-pollution and zero-residue treatment method | |
| CN104745155A (en) | Recycling and harmless treatment process of waste oil-based drilling fluid | |
| CN113698176A (en) | Method for preparing sintered bricks by using solid-phase wastes of offshore water-based drilling | |
| CN113135676A (en) | Anaerobic thermal desorption efficient waste residue treatment method based on oil-based rock debris | |
| CN204262036U (en) | A kind of environment-friendly type cinder recovery and processing system | |
| CN105062460A (en) | Method for preparing oil fracturing proppant from insulated side walls of waste electrolytic baths | |
| CN103846268B (en) | The method of Footwall drift copper from the copper cash being coated with chloride synthetic resin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |