CN115948156A - Preparation method and application of resin-coated color sand fracturing propping agent - Google Patents
Preparation method and application of resin-coated color sand fracturing propping agent Download PDFInfo
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- CN115948156A CN115948156A CN202211632650.9A CN202211632650A CN115948156A CN 115948156 A CN115948156 A CN 115948156A CN 202211632650 A CN202211632650 A CN 202211632650A CN 115948156 A CN115948156 A CN 115948156A
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Abstract
The application discloses various sand fracturing propping agent of resin tectorial membrane, including following step: s1, selecting a propping agent meeting the standard, and pouring the propping agent into a stirrer; s2, weighing color paste with the weight of 0.8-1.0% of that of the propping agent, and pouring the color paste into a stirrer for sand mixing; s3, adding the propping agent coated with the color paste coating into a sand mixer, heating to 180-240 ℃, and stirring; s4, weighing epoxy resin accounting for 0.8-1.2% of the weight of the propping agent and phenolic resin accounting for 1.2-1.8% of the weight of the propping agent, adding the epoxy resin and the phenolic resin into a sand mixer, and stirring until the mixed color is uniform; s5, weighing hexamethylene tetramine accounting for 15% of the weight of the resin, and adding the hexamethylene tetramine into a sand mixer. The application also comprises an application of the resin coated color sand fracturing propping agent. This application is through carrying out different dyeing tectorial membranes to different specification proppant and handling, can confirm the proppant specification through the sand color when taking place the sand to change the proppant, provide data support for the same landform simultaneously, reduce the sand output.
Description
Technical Field
The invention relates to the technical field of proppant production, in particular to a preparation method and application of a resin coated color sand fracturing proppant.
Background
In the oil field exploitation process, stratum energy can be continuously reduced along with continuous oil field exploitation, the pressure difference inside an oil well can be continuously increased at the moment, the problem of sand production of the oil well is continuous and serious, and the sand production of the oil well can cause great influence on the productivity of the oil well. The stratum sand production can enter a shaft, the blocking condition of pipelines and equipment can be caused, or a pump is damaged, even the problem of well wall collapse can be caused, the deformation and the damage of a sleeve can be caused, finally, an oil well can not continue to produce, and the follow-up exploitation and the final recovery ratio can be influenced, so that the research on the sand production mechanism of the oil well is enhanced, effective sand prevention measures are taken according to the sand production mechanism of the oil well to prevent the sand production problem of the oil well, and the method has important significance for ensuring the stability of the productivity of the oil field and improving the final recovery ratio.
When the existing proppant is subjected to sand production, field personnel cannot determine which specification of proppant has the largest sand production amount and determine which section of oil way is not suitable for exploitation, and the specification of the proppant is changed, so that a preparation method of the resin coated color sand fracturing proppant and application thereof are provided to solve the problems.
Disclosure of Invention
The application provides a preparation method and application of a resin coated color sand fracturing propping agent, which solve the problem that the sand production specification cannot be judged when sand production occurs in the ready-made production process of petroleum.
The application provides a resin tectorial membrane color sand fracturing propping agent, including following step:
s1, selecting a propping agent meeting the standard, and pouring the propping agent into a stirrer;
s2, weighing color paste with the weight of 0.8-1.0% of that of the propping agent, and pouring the color paste into the stirrer for sand mixing;
s3, adding the propping agent coated with the color paste coating into a sand mixer, heating to 180-240 ℃, and stirring;
s4, weighing epoxy resin accounting for 0.8-1.2% of the weight of the proppant and phenolic resin accounting for 1.2-1.8% of the weight of the proppant, adding the epoxy resin and the phenolic resin into the sand mixer, and stirring until the color is uniformly mixed;
s5, weighing hexamethylene tetramine accounting for 15% of the weight of the resin, adding the hexamethylene tetramine into the sand mixer, stirring until the epoxy resin is solidified, and cooling to normal temperature;
and S6, screening to obtain the resin coated colored sand fracturing propping agent with the required specification.
Preferably, the proppant is quartz sand or ceramsite.
Preferably, the processing specification of the proppant is 20-40 meshes, 30-50 meshes, 40-70 meshes and 70-140 meshes.
Preferably, the color paste is an oily color paste.
Preferably, the color paste is added at a speed of 1-2 kg per minute, and is stirred for 3 minutes after the addition.
Preferably, the ratio of the epoxy resin to the phenolic resin is 1:1.5.
preferably, the color paste and the proppant are stirred by a concrete mixer.
The application of the resin coated color sand fracturing propping agent is to apply the obtained resin coated color sand fracturing propping agent with different colors to oil exploitation.
According to the technical scheme, the application provides a various sand fracturing proppant of resin tectorial membrane, through the mill base of different colours in this application, dyes the processing to the proppant of different particle diameters, evenly dyes the back, through the mode of heating at its surperficial even cladding one deck resin, the resin cladding is even after solidifying, the inspection is qualified, uses, in the use, in case the oil well takes place out the sand phenomenon, can confirm the oil well fast according to the colour and go out the sand specification, change the proppant specification.
Compared with the prior art, the invention has the beneficial effects that:
1. by coating the color paste before coating the resin on the proppant, the proppant with different particle sizes can be marked to mark different colors, and the color of the sand proppant can be found in time in the using process, so that the judgment can be made quickly and the replacement can be carried out;
2. by means of the film coating treatment of the proppant, the flowability of the proppant is improved, and the strength of the proppant is further improved.
To sum up, this application through carrying out different dyeing tectorial membranes to different specification proppants and handle, can confirm the proppant specification through the sand production colour when taking place the sand to change the proppant, provide data support for the same landform simultaneously, reduce the sand production volume, increase oil production.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a production process diagram of a resin-coated colored sand fracturing proppant provided by the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1, current proppant colour is roughly the same, can not confirm that it is that which specification proppant sand production volume is the biggest according to the colour of sand production when taking place the sand production, and this application carries out different dyeing tectorial membrane treatments to different specification proppants, can confirm the proppant specification through sand production colour when taking place the sand production to change the proppant, support for the same landform provides data simultaneously, reduce the sand production volume, increase the oil production, specific resin tectorial membrane color fracturing proppant, include following step:
s1, selecting a standard-meeting propping agent, treating 20-40 mesh, 30-50 mesh, 40-70 mesh and 70-140 mesh propping agents mainly in the application, treating different colors of the propping agents with different specifications, pouring the required propping agent into a stirrer during treatment, wherein the propping agent is quartz sand or ceramsite, and is stirred at present, and the propping agent does not need to be dried and agglomerated;
s2, weighing color paste with the weight of 0.8-1.0% of that of the propping agent, wherein the color paste is oily color paste, the propping agent with the same specification is made of color paste with the same color for distinguishing the specification of the propping agent, when the color difference in the propping agent is larger, the specific gravity of the color paste can be improved, the color uniformity of the propping agent can be improved, pouring the color paste into a mixer for sand mixing, adding the color paste at the speed of 1-2 kg per minute, stirring for 3 minutes after the addition is finished, and stirring the color paste and the propping agent through a concrete mixer to uniformly mix the colors;
s3, adding the propping agent coated with the color paste coating to a sand mixer, mixing colors by the mixer at first when the sand mixer and the mixer work simultaneously due to large production capacity, and heating by the sand mixer to improve the production efficiency, wherein the temperature is in inverse proportion to the granularity, and the smaller the granularity is, the higher the temperature is, so that the adhesion effect is improved;
s4, weighing the epoxy resin and the phenolic resin which are 0.8-1.2% and 1.2-1.8% of the weight of the propping agent, wherein when the epoxy resin and the phenolic resin are added, the ratio of the epoxy resin to the phenolic resin is 1:1.5, the resin material has good adhesiveness and good solvent corrosion resistance, can be used in a complex environment of oil exploitation, can be added into a sand mixer in the adding process, can be added at one time, and is stirred until the color mixing is uniform;
s5, weighing hexamethylenetetramine accounting for 15% of the weight of the resin, adding the hexamethylenetetramine into a sand mixer, solidifying the resin material to enable the propping agent to be kept in a state at a high temperature without falling off, stirring until the epoxy resin is solidified, cooling to normal temperature, and continuously stirring in the cooling process;
s6, screening to obtain the resin coated colored sand fracturing propping agent with the required specification, and screening qualified propping agents, wherein uniform colors are attached, and the overall performance of propping agent products is further improved.
The application also comprises the application of the resin coated color sand fracturing propping agent, and the obtained resin coated color sand fracturing propping agent with different colors is applied to oil exploitation.
The following description is made in conjunction with specific embodiments;
example 1
800kg of 20-40 mesh quartz sand and 6.4kg of color paste, 6.4kg of epoxy resin, 9.6kg of phenolic resin and 2.4kg of hexamethylenetetramine are weighed.
Conveying the quartz sand into a stirrer through a belt conveyor, adding color paste into the stirrer, stirring for 3 minutes, after the colors are uniformly mixed, conveying the quartz sand coated with the color paste into a sand mixer, heating to 220 ℃, adding epoxy resin and phenolic resin, after uniform stirring, adding hexamethylenetetramine until the resin is fully cured, and cooling to room temperature.
Example 2
800kg of 30-50-mesh quartz sand, 6.4kg of color paste, 8kg of epoxy resin, 12kg of phenolic resin and 3kg of hexamethylenetetramine are weighed.
Conveying the quartz sand into a stirrer through a belt conveyor, adding color paste into the stirrer, stirring for 3 minutes, after the colors are uniformly mixed, conveying the quartz sand coated with the color paste into a sand mixer, heating to 230 ℃, adding epoxy resin and phenolic resin, after uniform stirring, adding hexamethylenetetramine until the resin is fully cured, and cooling to room temperature.
Example 3
800kg of quartz sand of 40-70 meshes, 6.4kg of color paste, 8.2kg of epoxy resin, 12.3kg of phenolic resin and 3.075kg of hexamethylenetetramine are weighed.
Conveying the quartz sand into a stirrer through a belt conveyor, adding color paste into the stirrer, stirring for 3 minutes, after the colors are uniformly mixed, conveying the quartz sand coated with the color paste into a sand mixer, heating to 230 ℃, adding epoxy resin and phenolic resin, after uniform stirring, adding hexamethylenetetramine until the resin is fully cured, and cooling to room temperature.
Example 4
800kg of ceramsite of 40-70 meshes, 6.4kg of color paste, 8.5kg of epoxy resin, 13kg of phenolic resin and 3.225kg of hexamethylenetetramine are weighed.
Conveying the quartz sand into a stirrer through a belt conveyor, adding color paste into the stirrer, stirring for 3 minutes, after the colors are uniformly mixed, conveying the quartz sand coated with the color paste into a sand mixer, heating to 230 ℃, adding epoxy resin and phenolic resin, after uniform stirring, adding hexamethylenetetramine until the resin is fully cured, and cooling to room temperature.
Example 5
800kg of 70-140 meshes of ceramsite and 6.4kg of color paste, 9.64kg of epoxy resin, 14.4kg of phenolic resin and 3.6kg of hexamethylenetetramine are weighed.
Conveying the quartz sand into a stirrer through a belt conveyor, adding color paste into the stirrer, stirring for 3 minutes, after the colors are uniformly mixed, conveying the quartz sand coated with the color paste into a sand mixer, heating to 230 ℃, adding epoxy resin and phenolic resin, after uniform stirring, adding hexamethylenetetramine until the resin is fully cured, and cooling to room temperature.
Sampling and analyzing the product obtained in the embodiment, and evaluating the stability of the proppant;
specifically, the physical and chemical properties of the proppant were evaluated.
Taking 8 parts of quartz sand with the specifications of 20-40 meshes, 30-50 meshes, 40-70 meshes and 70-140 meshes, and 8 parts of samples in example 1, example 2, example 3, example 4 and example 5 respectively, wherein each sample is 100 +/-0.1 g in mass, pouring 100g of resin coated color sand fracturing propping agent sample into a discharged standard sieve top sieve, then placing the standard sieve on a vibrating sieve, weighing the mass of the propping agent on each sieve and a base plate in sequence after sieving for 10min, and calculating the mass fraction of each particle size range. If the accumulation differs by 0.5% from the specimen, the sample should be replaced and retested.
Taking 1 part of each of the samples of example 1, example 2, example 3, example 4 and example 5, carrying out an acid hydrolysis experiment, wherein an acid solution adopts a soil acid system, the specific preparation method is the same as SY/T5108-2014 proppant Performance test method for Hydraulic fracturing and gravel packing operations, chapter 8, a proper amount of proppant sample subjected to gel breaking treatment is dried at 105 ℃ for 1h, then the proppant sample is placed in a drier for cooling for 0.5h, 5g +/-0.001 g of the treated proppant sample is weighed and added into a 250ml polytetrafluoroethylene beaker, the prepared soil acid solution is poured into the beaker, and the covered polytetrafluoroethylene beaker containing the acid solution and the proppant sample is placed in a water bath at 66 ℃ for constant temperature for 0.5h. Paying attention to no stirring and no pollution, putting qualitative filter paper into a polytetrafluoroethylene Buchner funnel, drying for 1h at 105 ℃, weighing and recording the mass, then putting the filter paper on a vacuum filtering device for standby, pouring a proppant sample and acid liquor into the polytetrafluoroethylene Buchner funnel, ensuring that all proppant particles in a polytetrafluoroethylene beaker are poured into the polytetrafluoroethylene Buchner funnel, then carrying out vacuum filtration, removing the acid liquor within 1min, flushing the proppant sample with distilled water for 3 times respectively in the suction filtration process, using 20ml of distilled water each time until the pH value of flushing liquor shows neutrality, putting the polytetrafluoroethylene Buchner funnel and the proppant sample therein into an oven, drying for at least 1h at 105 ℃, then putting into a dryer for cooling for 0.5h, weighing and recording the mass of the cooled polytetrafluoroethylene Buchner funnel and the proppant sample together.
Taking 1 part of each of the samples of example 1, example 2, example 3, example 4 and example 5, carrying out turbidity, putting 30g of proppant subjected to gel breaking treatment into a 250ml wide-mouth bottle, pouring 100ml of distilled water into the wide-mouth bottle, standing for 30min, horizontally and repeatedly shaking for 0.5min by hand, standing for 5min for 60 times (stirring failure), debugging a turbidity meter, starting a power supply of the instrument, and preheating for 30 min; ensuring the cleanness of the turbidity standard plate and the cuvette; and (3) sequentially carrying out air zero calibration, adjusting the turbidity standard plate to a calibration value and adjusting the distilled water to zero, injecting the prepared sample into a corresponding cuvette by using a medical injector according to the instruction of an instrument, placing the cuvette into the instrument for measurement, and directly reading the turbidity value from a display screen of the instrument.
The samples of example 1, example 2, example 3, example 4 and example 5 were each 6 parts and tested for crush resistance, two identical proppant were mixed to give a 200g sample, the mesh sizes of the top and bottom screens were selected to suit the proppant sample size, a set of screens was prepared and then placed in a screen shaker. The proppant samples were poured into the top screen and the lid was closed. And (4) vibrating the group screen in a vibrating screen machine for 10min, taking out the group screen, and completely pouring out the samples left in the top screen and the bottom plate. Only the sample in the bottom screen was left for the breakage rate experiments. Experimental method according to SY/T5108-2014 proppant Performance test methods for Hydraulic fracturing and gravel pack operations Chapter 11.5 proppant fracture Rate test methods, 3 parallel samples are made for each sample, and the arithmetic mean value is taken as the test result. The difference between each test value and the arithmetic mean value is not more than 10 percent, and the numerical value of the test result is revised according to GB/T8170-2008.
In the invention, the tectorial membrane colored sand with the breakage rate of less than 9 percent under 52MPa can provide the technical index of the breakage rate of the sample which can meet the use requirement under the condition of 52MPa closed pressure stratum.
And heating the mixture in an infrared blast drying oven to 50 ℃, adding colored sand, and stopping heating until the mixture is cooled to room temperature, wherein the color is unchanged.
And (3) stirring and settling the sample 72 hours after soaking, separating the upper layer liquid from the sample, putting the sample into a beaker, adding a gel breaker (ammonium persulfate) for gel breaking, observing whether color change occurs in the liquid or not, and indicating that the coating shell of the color sand is stable within the testing time because no dropped color shell or color substance occurs at the bottom of the beaker. Because the laboratory test time and equipment are limited, the specific aging time period of the precoated sand cannot be judged. However, the research data show that the epoxy resin is an oil-resistant and acid-alkali-resistant material, and the aging resistance time of the film-coated particles is about 10 years at the formation temperature and the formation pressure
According to the invention, the color paste with different colors is used for dyeing the propping agents with different particle sizes, after uniform dyeing, a layer of resin is uniformly coated on the surface of the propping agents in a heating mode, and after the resin is uniformly coated and cured, the propping agents are qualified for use.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (8)
1. The resin coated color sand fracturing propping agent is characterized by comprising the following steps:
s1, selecting a propping agent meeting the standard, and pouring the propping agent into a stirrer;
s2, weighing color paste with the weight of 0.8-1.0% of that of the propping agent, and pouring the color paste into the stirrer for sand mixing;
s3, adding the propping agent coated with the color paste coating into a sand mixer, heating to 180-240 ℃, and stirring;
s4, weighing epoxy resin accounting for 0.8-1.2% of the weight of the proppant and phenolic resin accounting for 1.2-1.8% of the weight of the proppant, adding the epoxy resin and the phenolic resin into the sand mixer, and stirring until the color is uniformly mixed;
s5, weighing hexamethylene tetramine accounting for 15% of the weight of the resin, adding the hexamethylene tetramine into the sand mixer, stirring until the epoxy resin is solidified, and cooling to normal temperature;
and S6, screening to obtain the resin coated colored sand fracturing propping agent with the required specification.
2. The resin-coated colored sand fracturing proppant as claimed in claim 1, wherein the proppant is quartz sand or ceramsite.
3. The resin-coated colored sand fracturing proppant as claimed in claim 2, wherein the processing specifications of the proppant are 20-40 mesh, 30-50 mesh, 40-70 mesh and 70-140 mesh.
4. The resin coated colored sand fracturing propping agent of claim 1, wherein said color paste is an oily color paste.
5. The resin-coated colored sand fracturing propping agent as claimed in claim 1, wherein said color paste is added at a rate of 1-2 kg per minute, and is stirred for 3 minutes after the addition.
6. The resin-coated colored sand fracturing proppant as set forth in claim 1, wherein the ratio of the epoxy resin to the phenolic resin is 1:1.5.
7. the resin-coated colored sand fracturing propping agent as claimed in claim 1, wherein said color paste and said propping agent are stirred by a concrete mixer.
8. The application of the resin-coated colored sand fracturing propping agent is characterized in that the resin-coated colored sand fracturing propping agent with different colors obtained according to any one of claims 1 to 7 is applied to oil exploitation.
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| CN202211632650.9A CN115948156A (en) | 2022-12-19 | 2022-12-19 | Preparation method and application of resin-coated color sand fracturing propping agent |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101903453A (en) * | 2007-12-14 | 2010-12-01 | 普拉德研究及开发股份有限公司 | Propping agent and application thereof |
| CN106190091A (en) * | 2016-07-08 | 2016-12-07 | 新密市万力实业发展有限公司 | A kind of waterproofing type proppant of oil thoroughly and preparation method thereof |
| CN110261060A (en) * | 2019-06-27 | 2019-09-20 | 中国石油大学(北京) | Lifting sand experiment device and method in a kind of supercritical carbon dioxide room |
| CN110566190A (en) * | 2019-09-29 | 2019-12-13 | 西南石油大学 | method for tracking motion trail of intra-slit proppant under high-particle-concentration experimental condition |
-
2022
- 2022-12-19 CN CN202211632650.9A patent/CN115948156A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101903453A (en) * | 2007-12-14 | 2010-12-01 | 普拉德研究及开发股份有限公司 | Propping agent and application thereof |
| CN106190091A (en) * | 2016-07-08 | 2016-12-07 | 新密市万力实业发展有限公司 | A kind of waterproofing type proppant of oil thoroughly and preparation method thereof |
| CN110261060A (en) * | 2019-06-27 | 2019-09-20 | 中国石油大学(北京) | Lifting sand experiment device and method in a kind of supercritical carbon dioxide room |
| CN110566190A (en) * | 2019-09-29 | 2019-12-13 | 西南石油大学 | method for tracking motion trail of intra-slit proppant under high-particle-concentration experimental condition |
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