CN115521772A - Fracturing propping agent and method for preparing fracturing propping agent by using drilling mud and rock debris of oil and gas field - Google Patents
Fracturing propping agent and method for preparing fracturing propping agent by using drilling mud and rock debris of oil and gas field Download PDFInfo
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- CN115521772A CN115521772A CN202211247150.3A CN202211247150A CN115521772A CN 115521772 A CN115521772 A CN 115521772A CN 202211247150 A CN202211247150 A CN 202211247150A CN 115521772 A CN115521772 A CN 115521772A
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- drilling mud
- rock debris
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- propping agent
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention relates to a fracturing propping agent and a method for preparing the fracturing propping agent by using drilling mud and rock debris of an oil and gas field. The fracturing propping agent comprises the following raw materials: oil and gas field drilling mud rock debris 50-60%, quartz sand 20-30%, fly ash 10-20% and clay 5-10%. Based on the principle that vitrified ceramics can be prepared into ultrahigh-strength, ultrahigh-acid-alkali-resistant ceramic particles, the high-quality petroleum fracturing propping agent can be directly prepared by taking drilling mud and rock debris as a main raw material through the working procedures of presintering, grinding, balling, drying, calcining and the like; in addition, the prepared fracturing propping agent can replace the function of quartz sand extracted from natural ore deposit, greatly improve the flow conductivity and the final recovery ratio of the modified oil layer and create higher economic benefit for oil extraction enterprises; the invention makes the substance from the underground deep part return to the extracted part in the form of functional material again, thus realizing the environment-friendly closed loop and crude oil green mining in the true sense.
Description
Technical Field
The invention belongs to the field of oil and gas field drilling mud rock debris treatment, and particularly relates to a fracturing propping agent and a method for preparing the fracturing propping agent by using the oil and gas field drilling mud rock debris.
Background
In the industry, the rock debris carried by mud and mud is required to be not allowed to fall to the ground in the drilling process of an oil and gas field and must be treated, however, the remaining solid rock debris after treatment contains partial heavy metals, cannot reach the standard and is discharged, the stock is more and more, more and more serious negative effects are caused to the development of the petroleum industry, the dependency of the exploitation speed and the storage of the oil and gas field is hindered, and meanwhile, environmental pollution and ecological damage are caused.
Therefore, safe disposal and comprehensive utilization of drilling mud cuttings have become a key bottleneck problem in sustainable development of oil field production and construction. The normal production and operation of the oil fields are increasingly difficult due to the bottleneck problems of the safe disposal and resource utilization of the drilling mud and the rock debris in technology and cost.
Therefore, the technical scheme of the invention is provided.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a fracturing propping agent and a method for preparing the fracturing propping agent by using drilling mud and rock debris in an oil and gas field.
The scheme of the invention provides a fracturing propping agent which comprises the following raw materials in percentage by weight: 50-60% of drilling mud rock debris, 20-30% of quartz sand, 10-20% of fly ash and 5-10% of clay.
Preferably, the fracturing propping agent comprises the following raw materials in percentage by weight: 55% of drilling mud rock debris, 25% of quartz sand, 15% of fly ash and 5% of clay in the oil and gas field.
Based on the same technical concept, the invention also provides a method for preparing fracturing propping agent by using drilling mud and rock debris of oil and gas fields, which comprises the following steps:
(1) Drying the drilling mud rock debris of the oil and gas field to obtain the drilling mud rock debris of the low water-bearing oil and gas field;
(2) Pre-burning the drilling mud rock debris of the low-water-content oil-gas field, mixing the rock debris with quartz sand, fly ash and clay, and grinding the mixture into powder to obtain mixed micro powder;
(3) Adopting water as an adhesive, balling the water and the mixed micro powder to prepare microspheres, and drying the microspheres to obtain dried microspheres;
(4) Calcining the dried microspheres and preserving heat to obtain a calcined material; and crushing, grading and inspecting the calcined material to obtain the fracturing propping agent.
Preferably, in the step (1), the rock debris of the drilling mud in the oil and gas field is dried until the water content of the drilling mud in the oil and gas field is less than or equal to 6%.
Preferably, in the step (2), the temperature of the pre-firing is 800 to 900 ℃.
Preferably, in step (2), the milling is carried out to a 425 mesh screen residue of < 1%.
Preferably, in the step (3), the drying is carried out until the free water content is 0.01-1%.
Preferably, in step (3), the size range of the microspheres is 1180-850 μm, 1180-600 μm, 850-425 μm, 600-300 μm, 425-212 μm or 212-106 μm.
Wherein, the fracture proppant finished product 1180-850 mu m (16/20 mesh), 1180-600 mu m (16/30 mesh) and 850-425 mu m (20/40 mesh) has the breaking rate of less than 9.0% under the closed pressure of 28MPa, the breaking rate of less than 9.0% under the closed pressure of 35MPa of 600-300 mu m (30/50 mesh), the breaking rate of less than 9.0% under the closed pressure of 52MPa of 425-212 mu m (40/70 mesh) and the breaking rate of less than 9.0% under the closed pressure of 69MPa of 212-106 mu m (70/140 mesh). The allowable value of the acid solubility of the finished fracturing propping agent is less than 7.0 percent. In the calcining process, 100 percent of waste products generated due to abnormal working conditions are returned to the pre-sintered drilling mud cuttings to be ground together, so that a closed cycle without solid waste discharge is formed.
Preferably, in the step (4), the calcining temperature is 1100-1170 ℃, and the heat preservation time is 0.5-3 h.
For the understanding of the present invention, the following description is made of the relevant materials:
the drilling mud and rock debris of the oil and gas field are rock mineral particles which are brought to the ground along with the circulation of mud in the drilling process of the oil and gas field, belong to solid waste and further need to be digested, quartz sand is used for improving the supporting strength, fly ash is also the solid waste but has the effect of reducing the density, and clay plays a role in improving the cementing strength and reducing the porosity.
The invention has the beneficial effects that:
based on the principle that vitrified ceramics can be prepared into ultrahigh-strength, ultrahigh-acid-alkali-resistant ceramic particles, the high-quality petroleum fracturing propping agent can be directly prepared by taking drilling mud and rock debris as a main raw material through the working procedures of presintering, grinding, balling, drying, calcining and the like; in addition, the prepared fracturing propping agent not only can replace the function of quartz sand mined from natural ore deposits, but also can greatly improve the flow conductivity and the final recovery ratio of a modified oil layer, and create higher economic benefit for oil-mining enterprises; the invention makes the substance from the underground deep part return to the extracted part again in the form of functional material, thus realizing the environment-friendly closed loop and crude oil green mine exploitation in the real sense.
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 making any creative effort, shall fall within the protection scope of the present invention.
It is emphasized that in actual production, the production is set according to actual requirements, and in most cases the production is different for each batch. In the examples of the invention, therefore, the quantities of raw materials are expressed in percentages (the percentages being fixed), increasing according to the corresponding percentages when the production demand is greater and decreasing according to the corresponding percentages when the production demand is smaller.
Example 1
This example provides a method for preparing a fracturing proppant, the raw materials used are shown in table 1.
TABLE 1 raw material amounts
| Raw materials | Dosage of |
| Drilling mud and rock debris for oil and gas field | 50％ |
| Quartz sand | 30％ |
| Fly ash | 10％ |
| Clay clay | 10％ |
| Total amount of | 100％ |
The preparation method comprises the following steps:
(1) Drying the drilling mud rock debris of the oil and gas field until the water content is 6 percent to obtain the drilling mud rock debris of the low water-bearing oil and gas field;
(2) Presintering the drilling mud rock debris of the low-water-content oil-gas field at 800 ℃, mixing the rock debris with quartz sand, fly ash and clay, and grinding the mixture to powder of 425 meshes and less than 1 percent to obtain mixed micro powder;
(3) Balling the mixture powder by using water as an adhesive to prepare microspheres, and drying the microspheres until the free water content is 0.01% to obtain dried microspheres;
(4) Calcining the dried microspheres at 1100 ℃ and preserving heat for 0.5h to obtain a calcined material; and crushing, grading and inspecting the calcined material to obtain the fracturing propping agent.
Example 2
This example provides a method for preparing a fracturing proppant, and the raw materials used are shown in table 2.
TABLE 2 raw material amounts
The preparation method comprises the following steps:
(1) Drying the drilling mud rock debris of the oil and gas field until the water content is 5 percent to obtain the drilling mud rock debris of the low water-bearing oil and gas field;
(2) Presintering the drilling mud rock debris of the low-water-content oil-gas field at 900 ℃, mixing the rock debris with quartz sand, fly ash and clay, and grinding the mixture to powder of 425 meshes and less than 1 percent to obtain mixed micro powder;
(3) Balling the mixture micro powder by using water as an adhesive to prepare a micro-sphere, and drying the micro-sphere until the free water content is 1% to obtain a dried micro-sphere;
(4) Calcining the dried microspheres at 1170 ℃ and preserving heat for 3h to obtain a calcined material; and crushing, grading and inspecting the calcined material to obtain the fracturing propping agent.
Example 3
This example provides a method for preparing a fracturing proppant, the raw materials used are shown in table 3.
TABLE 3 raw material amounts
The preparation method comprises the following steps:
(1) Drying the drilling mud rock debris of the oil and gas field until the water content is 4 percent to obtain the drilling mud rock debris of the low water-bearing oil and gas field;
(2) Presintering the drilling mud and rock debris of the low-water-content oil-gas field at 850 ℃, mixing the low-water-content oil-gas field with quartz sand, fly ash and clay, and grinding the mixture until the mesh size of 425 meshes is less than 1 percent to obtain mixed micro powder;
(3) Balling the mixture powder by using water as an adhesive to prepare microspheres, and drying the microspheres until the free water content is 0.5% to obtain dried microspheres;
(4) Calcining the dried microspheres at 1150 ℃ and preserving heat for 1.5 hours to obtain a calcined material; and crushing, grading and inspecting the calcined material to obtain the fracturing propping agent.
Example 4
This example provides a method for preparing a fracturing proppant, and the raw materials used are shown in table 4.
TABLE 4 raw material amounts
| Starting materials | Dosage of |
| Drilling mud and rock debris for oil and gas field | 52％ |
| Quartz sand | 22％ |
| Fly ash | 20％ |
| Clay clay | 6％ |
| Total amount of | 100％ |
The preparation method comprises the following steps:
(1) Drying the drilling mud rock debris of the oil and gas field until the water content is 4.5 percent to obtain the drilling mud rock debris of the low water-bearing oil and gas field;
(2) Presintering the drilling mud rock debris of the low-water-content oil-gas field at 820 ℃, mixing the rock debris with quartz sand, fly ash and clay, and grinding the mixture until the mesh size of 425 meshes is less than 1 percent to obtain mixed micro powder;
(3) Balling the mixture micro powder by using water as an adhesive to prepare microspheres, and drying the microspheres until the free water content is 0.7 percent to obtain dried microspheres;
(4) Calcining the dried microspheres at 1120 ℃ and preserving heat for 2.5 hours to obtain a calcined material; and crushing, grading and inspecting the calcined material to obtain the fracturing propping agent.
In order to further show the performance of the fracturing propping agent disclosed by the invention, the fracturing propping agent obtained in example 3 is detected, and the detection results are shown in tables 5-8.
TABLE 5 test results
TABLE 6 test results
TABLE 7 test results
TABLE 8 test results
The above description is only for the specific embodiment 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 (9)
1. The fracturing propping agent is characterized by comprising the following raw materials in percentage by weight: oil and gas field drilling mud rock debris 50-60%, quartz sand 20-30%, fly ash 10-20% and clay 5-10%.
2. The fracturing proppant of claim 1, comprising the following raw materials in weight percent: 55% of drilling mud rock debris, 25% of quartz sand, 15% of fly ash and 5% of clay in the oil and gas field.
3. A method of producing a fracturing proppant using the field drilling mud cuttings of claim 1 or 2, the method comprising the steps of:
(1) Drying the drilling mud rock debris of the oil and gas field to obtain the drilling mud rock debris of the low water-bearing oil and gas field;
(2) Pre-burning the drilling mud rock debris of the low-water-content oil-gas field, mixing the rock debris with quartz sand, fly ash and clay, and grinding the mixture into powder to obtain mixed micro powder;
(3) Adopting water as an adhesive, balling the water and the mixed micro powder to prepare microspheres, and drying the microspheres to obtain dried microspheres;
(4) Calcining the dried microspheres and preserving heat to obtain a calcined material; and crushing, grading and inspecting the calcined material to obtain the fracturing propping agent.
4. The method of claim 3, wherein in step (1), the oil and gas field drilling mud cuttings are dried until the water content of the oil and gas field drilling mud is less than or equal to 6%.
5. The method of claim 3, wherein the pre-firing temperature in step (2) is 800-900 ℃.
6. The method of claim 3 wherein in step (2) said milling is to a 425 mesh screen residue of < 1%.
7. The method of claim 3, wherein in step (3), the drying is carried out to a free water content of 0.01 to 1%.
8. The method of claim 3, wherein in step (3), the size of the microspheres is in the range of one of 1180-850 μm, 1180-600 μm, 850-425 μm, 600-300 μm, 425-212 μm, or 212-106 μm.
9. The method according to claim 3, wherein in the step (4), the calcining temperature is 1100-1170 ℃, and the holding time is 0.5-3 h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211247150.3A CN115521772A (en) | 2022-10-12 | 2022-10-12 | Fracturing propping agent and method for preparing fracturing propping agent by using drilling mud and rock debris of oil and gas field |
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| CN202211247150.3A CN115521772A (en) | 2022-10-12 | 2022-10-12 | Fracturing propping agent and method for preparing fracturing propping agent by using drilling mud and rock debris of oil and gas field |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116177881A (en) * | 2023-02-22 | 2023-05-30 | 四川君和环保股份有限公司 | Ultralow-density ceramsite fracturing propping agent and preparation method thereof |
| CN116177882A (en) * | 2023-02-22 | 2023-05-30 | 四川君和环保股份有限公司 | Low-cost ceramsite propping agent and preparation method thereof |
| CN116177883A (en) * | 2023-02-22 | 2023-05-30 | 四川君和环保股份有限公司 | High-strength ceramsite fracturing propping agent and preparation method thereof |
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| CN102899015A (en) * | 2012-09-20 | 2013-01-30 | 宜兴市腾飞陶粒制造有限公司 | Low-density ceramic proppant prepared from fly ash and preparation method thereof |
| US20170226410A1 (en) * | 2013-08-20 | 2017-08-10 | Epropp, Llc | Proppant Material Incorporating Fly Ash and Method of Manufacture |
| CN110484231A (en) * | 2019-08-09 | 2019-11-22 | 西南石油大学 | A method of low-density propping agent is prepared using oil-base mud waste as raw material |
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2022
- 2022-10-12 CN CN202211247150.3A patent/CN115521772A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899015A (en) * | 2012-09-20 | 2013-01-30 | 宜兴市腾飞陶粒制造有限公司 | Low-density ceramic proppant prepared from fly ash and preparation method thereof |
| US20170226410A1 (en) * | 2013-08-20 | 2017-08-10 | Epropp, Llc | Proppant Material Incorporating Fly Ash and Method of Manufacture |
| CN110484231A (en) * | 2019-08-09 | 2019-11-22 | 西南石油大学 | A method of low-density propping agent is prepared using oil-base mud waste as raw material |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116177881A (en) * | 2023-02-22 | 2023-05-30 | 四川君和环保股份有限公司 | Ultralow-density ceramsite fracturing propping agent and preparation method thereof |
| CN116177882A (en) * | 2023-02-22 | 2023-05-30 | 四川君和环保股份有限公司 | Low-cost ceramsite propping agent and preparation method thereof |
| CN116177883A (en) * | 2023-02-22 | 2023-05-30 | 四川君和环保股份有限公司 | High-strength ceramsite fracturing propping agent and preparation method thereof |
| CN116177882B (en) * | 2023-02-22 | 2023-11-28 | 四川君和环保股份有限公司 | Low-cost ceramsite propping agent and preparation method thereof |
| CN116177881B (en) * | 2023-02-22 | 2023-11-28 | 四川君和环保股份有限公司 | Ultralow-density ceramsite fracturing propping agent and preparation method thereof |
| CN116177883B (en) * | 2023-02-22 | 2023-12-12 | 四川君和环保股份有限公司 | High-strength ceramsite fracturing propping agent and preparation method thereof |
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