CN114085655B - Material for treating waste oil-based mud thermal desorption dry slag and well cementation cement paste - Google Patents
Material for treating waste oil-based mud thermal desorption dry slag and well cementation cement paste Download PDFInfo
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The application discloses a material for thermal desorption dry slag treatment of waste oil-based mud and well cementing cement slurry. The material comprises a component A and a component B; the component A is one or more selected from diatomite, activated carbon, activated alumina and zeolite, preferably diatomite; the component B is one or more of alkyl succinic acid ester sulfonate, alkylphenol polyoxyethylene ether, polyvinylpyrrolidone, polyoxyethylene sorbitan monooleate, alkyl diphenyl ether disulfonate and alkyl polyethylene glycol ether. The well cementation cement paste comprises the following components in parts by weight: 100 parts of oil well cement; 3 to 35 parts of thermal desorption dry slag; 0.5 to 2 parts of component A; 0.25 to 0.6 parts of component B; 5 to 25 parts of reinforcing agent; 0.5 to 3 parts of an activator; 2 to 8 parts of a fluid loss agent; 0 to 1.5 parts by weight of retarder; 40 to 140 parts of water.
Description
Technical Field
This document relates to, but is not limited to, oilfield waste reuse, and in particular, but not limited to, a material for thermal desorption dry slag treatment of waste oil-based mud.
Background
The oil-based mud is drilling fluid taking oil as a continuous phase, and excellent performance is endowed by adding materials such as an emulsifying agent, a stabilizing agent, a filtrate reducer and the like, so that the technical requirements of the drilling process are met more and more. Compared with water-based mud, the oil-based mud has better lubricating property, inhibition property and thermal stability, has little damage to oil and gas layers, and can be well applied to complex strata such as deep wells, ultra-deep wells, water sensitivity collapse and the like. The oil-based mud is generally recycled due to higher cost, but as the use times are increased, drill cuttings are continuously invaded in the drilling process, so that the performance of the oil-based mud is gradually deteriorated, the oil-based mud cannot be reused, and the waste oil-based mud is formed. According to the specification of GB4914-2008 'pollutant emission concentration limit for offshore oil exploration and development', oil-based drilling fluid cannot be discharged into the sea. Therefore, in recent years, the waste oil-based mud produced during offshore drilling is transported back to land for disposal.
At present, the treatment modes of old oil-based mud mainly comprise thermal distillation desorption (thermal desorption), solvent extraction, supercritical fluid extraction, pit sealing and burying, injection into safe stratum, chemical demulsification and the like, wherein the thermal desorption method is the most conventional large-scale treatment method, and the oil recovery rate is high and can reach more than 90%. In the thermal distillation desorption process, the recovered oil is generally subjected to reformulation of oil-based mud so as to achieve the aim of recycling; however, the thermal desorption dry slag generated by residual thermal desorption still contains a certain amount of oil substances, and according to the national hazardous waste directory-2016, the thermal desorption dry slag of the waste oil-based mud is still dangerous waste and needs further treatment. The part of the thermal desorption dry slag is generally subjected to conventional landfill treatment or engineering paving by adding a curing agent, but harmful substances therein can gradually migrate out over time to cause secondary pollution. Along with the higher and higher environmental protection requirements of China, the treatment mode can not meet the requirements, and the thermal desorption dry slag is required to be subjected to harmless treatment, so that zero emission of dangerous wastes is achieved.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the application.
The method focuses on harmless and recycling treatment of the thermal desorption dry slag of the waste oil-based mud, adds the thermal desorption dry slag into the well cementation cement slurry, changes the thermal desorption dry slag into an external admixture for well cementation operation, and makes the well cementation cement slurry prepared by the thermal desorption dry slag have good performance through technical treatment, thereby meeting the well cementation operation requirement, achieving in-situ treatment of dangerous wastes, reducing the emission and lowering the treatment cost.
The application provides a material for treating waste oil-based mud thermal desorption dry slag, which comprises the following components: a component A and a component B;
the component A is one or more selected from diatomite, activated carbon, alumina and zeolite;
the component B is one or more selected from alkyl succinate sulfonate, alkylphenol polyoxyethylene ether, polyvinylpyrrolidone, polyoxyethylene sorbitan monooleate, alkyl diphenyl ether disulfonate and alkyl polyethylene glycol ether;
in one embodiment provided herein, the weight ratio of component A to component B is (0.5 to 2): 0.25 to 0.6.
In yet another aspect, the application provides a cement slurry for well cementation prepared based on waste oil-based mud thermal desorption dry slag, comprising, in parts by weight: 100 parts of oil well cement; 3 to 35 parts of thermal desorption dry slag; 0.5 to 2 parts of component A; 0.25 to 0.6 parts of component B; 5 to 25 parts of reinforcing agent; 0.5 to 3 parts of an activator; 2 to 8 parts of a fluid loss agent; 0 to 1.5 parts by weight of retarder; 40 to 140 parts of water. Optionally, the well cementation cement slurry consists of the components.
In one embodiment provided herein, the reinforcing agent is selected from one or more of nano silicon, micro silicon powder, metakaolin, slag or fly ash;
in one embodiment provided herein, the particle size of the reinforcing agent is 0.1 to 1 μm, preferably the reinforcing agent is silica fume, and the structure is an amorphous structure.
In one embodiment provided herein, the activator is selected from one or more of aluminates, silicates, sulphates or hydroxides of alkaline earth metals;
in one embodiment provided herein, the activator has a particle size of 200 mesh to 800 mesh.
In one embodiment provided herein, the fluid loss additive is selected from AMPS-type fluid loss additives;
in one embodiment provided herein, the fluid loss additive is selected from the group consisting of a terpolymer of 2-acrylamido-2-methylpropanesulfonic Acid (AMPS), N-Dimethylacrylamide (DMAA), and Maleic Anhydride (MA).
In one embodiment provided herein, the retarder is selected from one or more of citric acid, hydroxyethylidene diphosphate, tartaric acid, boric acid.
In yet another aspect, the application provides a method for treating thermal desorption dry slag of waste oil-based mud, comprising using component a and component B to mix uniformly with thermal desorption dry slag;
the component A is one or more selected from diatomite, activated carbon, activated alumina and zeolite;
the component B is one or more of alkyl succinic acid ester sulfonate, polyethylene glycol octyl phenyl ether, polyvinylpyrrolidone, polyoxyethylene sorbitan monooleate, alkyl diphenyl ether disulfonate and alkyl polyethylene glycol ether.
In one embodiment provided herein, the weight ratio of the thermal desorption dry slag, the component a, and the component B is (3 to 35): (0.5 to 2): (0.25 to 0.6).
In one embodiment provided herein, the thermal desorption dry residue is a solid residue remaining after separating the liquid phase of the waste oil-based mud that cannot be reused by thermal distillation at 260 ℃ to 500 ℃;
in one embodiment provided herein, the thermal desorption dry slag has a particle size of 80 mesh to 200 mesh;
in one embodiment provided herein, the oil content of the thermal desorption dry residue is from 0.8wt.% to 2.0wt.%.
The density of the well cementation cement paste designed by the application is 1.60g/cm 3 ～1.90g/cm 3 After a large amount of desorption dry slag is doped, the cement slurry has good performances and meets the well cementation operation under the conventional temperature condition.
At present, related researches on the application of waste oil-based mud thermal desorption dry slag to well cementation cement paste are not yet carried out, and mainly, methods of landfill, engineering paving, cement firing in cement factories and the like are adopted for treatment.
The method achieves the aim of harmless and recycling treatment of the waste oil-based mud thermal desorption dry slag through construction of a well cementation cement slurry system, achieves in-situ reinjection of dangerous wastes, changes waste into valuable, has low energy consumption and does not have secondary pollution risk.
The characteristics and effects of this application lie in:
(1) Thermal desorption is carried out on the waste oil-based mud dry slag at 260-500 ℃ to form thermal desorption dry slag powder with a certain size fraction, wherein the oil content is about 0.8-2.0% (mass fraction);
(2) By adding the surface wetting agent, the hydrophilic effect of the surface of the dry slag powder is obviously improved, the ash-discharging speed is higher when cement paste is prepared, the fluidity of the cement paste is better, and the cementing with other materials is improved;
(3) Free oil in the dry slag powder is bound through the addition of the component A and the component B, so that obvious oil flowers are not generated on the surface of the cement paste, and the pollution of the oil to the cement paste is effectively inhibited;
(4) The cement paste can form a stable cement paste system, and the cement paste density can be 1.50g/cm 3 To 1.90g/cm 3 ；
(5) In the use process, dry slag powder and solid materials such as cement and the like can be dry-mixed to form a uniform solid mixed material, and the use is convenient;
the prepared cement paste has good performances and strength of more than 14MPa, and can meet the requirement of shallow surface layer well cementation; the strength of the low-density cement paste can reach more than 3.5MPa, and the low-density cement paste can be used as low-density filling paste with low requirements.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. Other advantages of the present application may be realized and attained by the structure particularly pointed out in the written description.
Drawings
The accompanying drawings are included to provide an understanding of the technical aspects of the present application, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present application and together with the examples of the present application, and not constitute a limitation of the technical aspects of the present application.
FIG. 1 is an exothermic rate curve of a blank and cement slurry with 10%, 20% and 30% dry slag added respectively, with a detection standard of GB/T12959-2008 cement hydration heat determination method; the detection equipment is a TAM Air and TA Instruments hydration calorimeter.
The added dry slag was the waste oil-based mud dry slag of example 4 treated at 260 c, and it can be seen from fig. 1 that cement hydration rates were increased by adding different amounts of dry slag. The result shows that the heat release time of the cement paste is advanced with the increase of the dry slag addition, which is beneficial to the development of early strength.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application are described in detail below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
In the embodiment of the application, the alkyl succinic acid ester sulfonate can be sodium diisooctyl succinate, which is purchased from Jiangsu province sea-ampere petrochemical plant; the alkylphenol polyoxyethylene ether can be octylphenol polyoxyethylene ether OP-10, and is purchased from Jiangsu province sea-An petrochemical plant; the polyvinylpyrrolidone may be polyvinylpyrrolidone PVP K25 available from Guangdong beautifier Inc.; the polyoxyethylene sorbitan monooleate can be Tween-80, and is purchased from Jiangsu province sea-An petrochemical plant; the alkyl diphenyl ether disulfonate can be sodium dodecyl diphenyl ether disulfonate 2A1, purchased from Guangzhou, inc. of Kanga chemical industry Co., ltd; the alkyl polyglycol ether may be polyethylene glycol monomethyl ether MPEG-2000, available from the sea An petrochemical plant of Jiangsu province.
Example 1
In this example, the component A is diatomaceous earth, which is purchased from Ji's Xin Shuai Yuan chemical Co., ltd., "JN-diatomaceous earth;
the component B is sodium diisooctyl succinate, and is purchased from Jiangsu province sea-ampere petrochemical plant;
in the embodiment, the waste oil-based mud is taken from a waste oil-based mud of a well in a middle sea oil Huizhou block, and the oil base is 3# white oil;
the solid residue obtained after the liquid phase of the waste oil-based mud is separated by thermal distillation at 350 ℃ is the thermal desorption dry residue, and the dry residue after desorption is ground and screened, so that the granularity of the thermal desorption dry residue is 120 meshes and the oil content is 1.2wt.%.
And uniformly mixing the thermal desorption dry slag, the component A and the component B according to the weight ratio of 10:1:0.25, and obtaining a mixture 1 for standby.
Preparing well cementation cement paste by taking the mixture prepared in the above way as a raw material, wherein the weight parts of the G-grade oil well cement are 100 parts, and the using amount of the mixture 1 is 11.25 parts; 5 parts of reinforcing agent; 1 part of an activator; 6 parts of a fluid loss agent; 0.3 parts of retarder; 42.15 parts of fresh water.
The reinforcing agent is micro silicon powder, has an amorphous structure, has the granularity of 0.1-1 mu m, and is purchased from Shandong Boken silicon materials Co., ltd, and is 85-grade micro silicon powder;
the activator is sodium sulfate, 200 meshes, with purity of more than 99%, and is purchased from Shandong Shangrui chemical Co., ltd;
the fluid loss agent is AMPS fluid loss agent, and is purchased from Tianjin Zhonghai oil service chemical Co., ltd, and the product code is PC-G80L.
The retarder is hydroxyethylidene diphosphate, with the code HEDP, purchased from Shandong jin Shengshen Biotechnology Co.
Example 2
In this example, component A is gamma phase alumina available from Ningbo Bei Gaer New Material Co., ltd., beigaer-Al 2 O 3 -7；
The component B is octyl phenol polyoxyethylene ether OP-10, which is purchased from Jiangsu sea-ampere petrochemical plant;
in the embodiment, the waste oil-based mud is taken from a waste oil-based mud of a well in a middle sea oil Huizhou block, and the oil base is 3# white oil;
the solid residue obtained after the liquid phase of the waste oil-based mud is separated by thermal distillation at 400 ℃ is the thermal desorption dry residue, and the dry residue after desorption is ground and screened, so that the granularity of the thermal desorption dry residue is 120 meshes and the oil content is 0.9wt.%.
And uniformly mixing the thermal desorption dry slag, the component A and the component B according to the weight ratio of 20:1.20:0.60, and obtaining a mixture 1 for standby.
Preparing well cementation cement paste by taking the mixture prepared in the above way as a raw material, wherein the weight parts of the G-grade oil well cement are 100 parts, and the using amount of the mixture 1 is 21.80 parts; 5 parts of reinforcing agent; 1 part of an activator; 6 parts of a fluid loss agent; 0.3 parts of retarder; 44.96 parts of fresh water.
The reinforcing agent is micro silicon powder, has an amorphous structure, has the granularity of 0.1-1 mu m, and is purchased from Shandong Boken silicon materials Co., ltd, and is 85-grade micro silicon powder;
the activator is sodium sulfate, 200 meshes, with purity of more than 99%, and is purchased from Shandong Shangrui chemical Co., ltd;
the fluid loss agent is AMPS fluid loss agent, and is purchased from Tianjin Zhonghai oil clothing chemical Co., ltd, and the product code is PC-G80L;
the retarder is hydroxyethylidene diphosphate, with the code HEDP, purchased from Shandong jin Shengshen Biotechnology Co.
Example 3
In this example, component A is gamma phase alumina available from Ningbo Bei Gaer New Material Co., ltd., beigaer-Al 2 O 3 -7；
The component B is sodium diisooctyl succinate, and is purchased from Jiangsu province sea-ampere petrochemical plant;
in the embodiment, the waste oil-based mud is taken from a waste oil-based mud of a well in a middle sea oil Huizhou block, and the oil base is 3# white oil;
the solid residue obtained after the liquid phase of the waste oil-based mud is separated by thermal distillation at 400 ℃ is the thermal desorption dry residue, and the dry residue after desorption is ground and screened, so that the granularity of the thermal desorption dry residue is 120 meshes and the oil content is 0.9wt.%.
And uniformly mixing the thermal desorption dry slag, the component A and the component B according to the weight ratio of 12:0.8:0.42, and obtaining a mixture 1 for standby.
Preparing well cementation cement paste by taking the mixture prepared in the above way as a raw material, wherein the weight parts of the G-grade oil well cement are 100 parts, and the using amount of the mixture 1 is 13.22 parts; 20 parts of reinforcing agent; 3 parts of an activator; 8 parts of a fluid loss agent; 0.2 parts of retarder; 93.27 parts of fresh water.
The reinforcing agent is micro silicon powder, has an amorphous structure, has the granularity of 0.1-1 mu m, and is purchased from Shandong Boken silicon materials Co., ltd, and is 85-grade micro silicon powder;
the activator is sodium sulfate, 200 meshes, with purity of more than 99%, and is purchased from Shandong Shangrui chemical Co., ltd;
the fluid loss agent is AMPS fluid loss agent, and is purchased from Tianjin Zhonghai oil clothing chemical Co., ltd, and the product code is PC-G80L;
the retarder is hydroxyethylidene diphosphate, with the code HEDP, purchased from Shandong jin Shengshen Biotechnology Co.
Example 4
This example differs from example 1 only in that the temperature of the waste oil-based mud thermal distillation separation liquid phase is 260 ℃.
Comparative example 1
The present comparative example differs from example 1 only in that component a is not involved.
Comparative example 2
The present comparative example differs from example 1 only in that component B is not involved.
Comparative example 3
The comparative example is a conventional cement slurry without adding waste oil-based mud to desorb dry slag, the density of the cement slurry is 1.90g/cm 3 The cement paste comprises the following components in parts by weight:
g-grade oil well cement: 100 parts; fluid loss agent: 4 parts; retarder: 0.2 parts; fresh water: 40.9 parts.
Comparative example 4
This comparative example was directed to the low density cement slurry of example 3, which was used mainly as a filler slurry, and therefore, a carrier soil commonly used as a filler slurry was used as a lightening material for the low density cement slurry, and the cement slurry formulation was:
g-grade oil well cement: 100 parts; carrying soil: 6 parts; fluid loss agent: 8 parts; fresh water: 78.54 parts.
The carrier soil is purchased from Xinhui mineral products limited company of Shijia, and sodium bentonite is used for drilling fluid;
prehydration is required during use, and the prehydration is carried out for about 16 hours.
Test case
Test examples cement slurries were formulated and tested according to API RP 10B-2.
1.9g/cm by example 1 and example 2 3 The conventional density cement paste has short ash mixing time and low water loss, and the strength reaches more than 14MPa, so that the requirement of well cementation operation can be met; in the comparative example 1, the component A is not added, so that more oil bubbles in the cement slurry are generated, the actual measurement density is lower, the ash mixing time is prolonged to 45 seconds, and the cement stone strength is also lower; in comparative example 2, component B is not added, the ash mixing time is prolonged to 42s and the strength is only 13.2MPa in the process of mixing cement slurry; the hydration heat of cement paste added with the desorption dry slag is obviously advanced, the thickening time at the low temperature of 30 ℃ is shortened, and the strength of 12h is higher than that of comparative example 3 without the desorption dry slag, which shows that the cement paste has a certain early strength effect at the low temperature and is more suitable for well cementation operation at the low temperature.
1.6g/cm of example 3 3 The strength of the low-density cement paste can reach more than 3.5MPa, and the operation requirement of the low-density surface filling paste is met; 1.6g/cm from comparative example 4 3 Compared with low-density cement paste, the cement paste has better water loss control capability and higher cement paste strength.
Although the embodiments disclosed in the present application are described above, the embodiments are only used for facilitating understanding of the present application, and are not intended to limit the present application. Any person skilled in the art to which this application pertains will be able to make any modifications and variations in form and detail of implementation without departing from the spirit and scope of the disclosure, but the scope of the application is still subject to the scope of the claims appended hereto.
Claims (7)
1. The well cementation cement paste prepared by the waste oil-based mud thermal desorption dry slag comprises the following components in parts by weight: 100 parts of oil well cement; 5 to 25 parts of reinforcing agent; 0.5 to 3 parts of an activator; 2 to 8 parts of a fluid loss agent; 0 to 1.5 parts by weight of retarder; 40 to 140 parts of water; mixture 1;
3 to 35 parts of the mixture 1 is dry slag obtained by thermal desorption; 0.5 to 2 parts of component A; 0.25 to 0.6 part of component B is evenly mixed to obtain the composition;
the component A is one or more selected from diatomite, activated carbon, alumina and zeolite;
the component B is one or more selected from alkyl succinate sulfonate, alkylphenol polyoxyethylene ether, polyvinylpyrrolidone, polyoxyethylene sorbitan monooleate, alkyl diphenyl ether disulfonate and alkyl polyethylene glycol ether;
the thermal desorption dry slag is the solid residue which is left after the liquid phase of the waste oil-based mud which can not be reused is separated by thermal distillation at 260-500 ℃;
the reinforcing agent is one or more selected from nano silicon, silica fume, metakaolin, slag or fly ash;
the activator is selected from one or more of aluminate, silicate, sulfate or hydroxide of alkaline earth metal.
2. A well cementing slurry according to claim 1 wherein the particle size of the reinforcing agent is from 0.1 to 1 μm.
3. A well cementing slurry according to claim 1 wherein the reinforcing agent is silica fume and the structure is an amorphous structure.
4. A well cementing slurry according to claim 1 wherein the activator has a particle size of 200 mesh to 800 mesh.
5. A well cementing slurry according to any one of claims 1 to 4, wherein the fluid loss additive is selected from AMPS-type fluid loss additives.
6. A well cementing slurry according to claim 5, wherein the fluid loss additive is selected from the group consisting of 2-acrylamido-2-methylpropanesulfonic Acid (AMPS), a terpolymer of N, N-Dimethylacrylamide (DMAA) and Maleic Anhydride (MA).
7. A well cementing slurry according to any one of claims 1 to 4, wherein the retarder is selected from one or more of citric acid, hydroxyethylidene diphosphate, tartaric acid, boric acid.
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| CN109626883A (en) * | 2019-01-23 | 2019-04-16 | 长江大学 | A kind of oil base landwaste cement slurry and preparation method thereof |
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| CA1140323A (en) * | 1980-08-08 | 1983-02-01 | John Kelly, Jr. | Method for treating oil-contaminated drill cuttings from a well drilling operation particularly at an offshore location |
| US4451377A (en) * | 1982-02-05 | 1984-05-29 | Luxemburg S Roy | Process for cleaning an oil-contaminated brine containing particulate drill cutting solids |
| JP2010279877A (en) * | 2009-06-03 | 2010-12-16 | Daito Kogyo Kk | Method for treating emulsion type wastewater |
| WO2011109598A1 (en) * | 2010-03-03 | 2011-09-09 | Soane Energy, Llc | Treatment of oil-contaminated solids |
| US20130331632A1 (en) * | 2012-05-29 | 2013-12-12 | Ronald N. Drake | Process for separation and recovery of cuttings, emulsion and slurry components |
| CN105618460B (en) * | 2015-12-30 | 2017-08-04 | 西南科技大学 | Integrated treatment method for degradation and solidification of oily drilling cuttings |
| CN111154466B (en) * | 2019-11-05 | 2022-08-26 | 中石化石油工程技术服务有限公司 | Well cementation cement slurry system capable of realizing resource utilization of oil-based drilling cutting ash |
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| WO2011073704A2 (en) * | 2009-12-14 | 2011-06-23 | Mudmax Kft: | Method and apparatus for handling drilling mud containing oil/water emulsion |
| CN109626883A (en) * | 2019-01-23 | 2019-04-16 | 长江大学 | A kind of oil base landwaste cement slurry and preparation method thereof |
| CN113135726A (en) * | 2021-04-13 | 2021-07-20 | 四川省星船城水泥股份有限公司 | Oil-based rock debris cement slurry and preparation method thereof |
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