A sand consolidant with high permeability performance

Abstract

The present invention belongs to the technical field of oilfield chemistry, and particularly relates to a sand consolidating agent with high permeability performance. The sand consolidating agent of the present invention comprises Agent A and Agent B. Agent A comprises the following components: N,N',N"-trimethyldiethylenetriamine, deionized water, amide propyl hydroxy sulfo betaine type viscoelastic surfactant, and N,N,N',N'-tetramethyl-1,3-butanediamine; Agent B comprises the following components: triethylene glycol monobutyl ether, methyl methacrylate-butadiene-styrene terpolymer, and MF-3285 type trifunctional alicyclic epoxy resin. This sand consolidating agent can effectively inhibit sand production in oil and gas wells and maintain high permeability.

Description

Technical Field

[0001] The present invention belongs to the technical field of oilfield chemistry, and particularly relates to a sand consolidant with high permeability performance. Background Art

[0002] Sand production refers to the phenomenon that formation sand flows into the wellbore during the production processes of oil and gas wells such as water injection and oil displacement due to reasons such as differential pressure damage and loose cementation of sandstone oil and gas reservoir rocks. When the sand production problem is relatively serious, it will block the oil and gas channels, resulting in a significant reduction or even shutdown of the production of oil and gas wells. To address the problem of sand production in oil and gas wells, a sand consolidant needs to be added to solidify the sand grains through the cementation effect between formation particles, thereby inhibiting the sand production phenomenon. For high-temperature and high-pressure formations, higher requirements are put forward for the cementation effect of the sand consolidant. On the other hand, a sand consolidant with a strong cementation effect often has a problem of poor pore-increasing effect. Therefore, most of the sand consolidant products on the market will have a problem of insufficient permeability retention rate during use in high-temperature and high-pressure oil layers, resulting in a decrease in the permeability of the oil and gas reservoir and a reduction in the production of oil and gas wells. Summary of the Invention

[0003] The object of the present invention is to provide a sand consolidant with high permeability performance to solve the problem of insufficient permeability retention rate of sand consolidants with strong cementation effect. This sand consolidant can effectively inhibit sand production in oil and gas wells and maintain high permeability.

[0004] To achieve the above object, the present invention provides a sand consolidant with high permeability performance. The sand consolidant includes Agent A and Agent B. Agent A includes the following components: N,N',N"-trimethyldiethylenetriamine, deionized water, amide propyl hydroxy sulfobetaine viscoelastic surfactant, and N,N,N',N'-tetramethyl-1,3-butanediamine; Agent B includes the following components: triethylene glycol monobutyl ether, methyl methacrylate-butadiene-styrene terpolymer, and MF-3285 type trifunctional alicyclic epoxy resin. Among them: In Agent A, N,N',N"-trimethyldiethylenetriamine serves as the main curing agent, deionized water is mainly used to promote the micellization of the amide propyl hydroxy sulfobetaine viscoelastic surfactant, the amide propyl hydroxy sulfobetaine viscoelastic surfactant mainly serves as a pore-increasing agent, and N,N,N',N'-tetramethyl-1,3-butanediamine serves as an auxiliary curing agent and an auxiliary pore-increasing agent. In particular, the combination of N,N,N',N'-tetramethyl-1,3-butanediamine and the amide propyl hydroxy sulfobetaine viscoelastic surfactant can make the amide propyl hydroxy sulfobetaine viscoelastic surfactant play a better pore-increasing role; in Agent B, MF-3285 type trifunctional alicyclic epoxy resin serves as a resin adhesive, methyl methacrylate-butadiene-styrene terpolymer serves as a toughening agent, and triethylene glycol monobutyl ether serves as a solubilizer for the methyl methacrylate-butadiene-styrene terpolymer and a dispersant for the sand consolidant. Agent A and Agent B in the sand consolidant are independent of each other. When in use, they are stirred and mixed according to a certain range of mass ratios. The mass ratio of Agent A to Agent B is 1.00:(1.06 - 1.33).

[0005] Preferably, by weight percentage, Agent A includes the following components: 67%-70% of N,N',N"-trimethyldiethylenetriamine, 19%-21% of deionized water, 4%-5% of amide propyl hydroxy sulfobetaine viscoelastic surfactant, 6%-8% of N,N,N',N'-tetramethyl-1,3-butanediamine, and the total of the above components is 100%; Agent B includes the following components: 6%-10% of triethylene glycol monobutyl ether, 3%-4% of methyl methacrylate-butadiene-styrene terpolymer, 86%-91% of MF-3285 type trifunctional alicyclic epoxy resin, and the total of the above components is 100%.

[0006] Preferably, the amide propyl hydroxy sulfobetaine viscoelastic surfactant is selected from erucic acid amide propyl hydroxy sulfobetaine. The concentration of the erucic acid amide propyl hydroxy sulfobetaine is 40%.

[0007] The present invention also provides a preparation method of the above sand consolidant with high permeability performance, including the following steps:

[0008] Production process of Agent A: Weigh the raw materials according to the ratio, pour N,N',N"-trimethyldiethylenetriamine into the reaction kettle, start stirring at a speed of 60r - 100r / min, keep the temperature at 15℃ - 40℃, add deionized water and amide propyl hydroxy sulfobetaine viscoelastic surfactant into the reaction kettle successively, stir for 0.5 - 1.0h, then add N,N,N',N'-tetramethyl-1,3-butanediamine, continue to stir for 0.5 - 1.0h, and the obtained light yellow micro-gel-like liquid is Agent A of the high-permeability sand consolidant;

[0009] Production process of Agent B: Weigh the raw materials according to the ratio, add triethylene glycol monobutyl ether into the reaction kettle, start heating up, and start stirring at a speed of 90r - 130r / min. When the temperature reaches 45℃, add methyl methacrylate-butadiene-styrene terpolymer, keep the temperature at 45℃ - 52℃, stir for 0.5 - 1.0h, then pour MF-3285 type trifunctional alicyclic epoxy resin into the reaction kettle, continue to stir for 0.5 - 1.0h, and cool to room temperature. The obtained light yellow viscous liquid is Agent B of the high-permeability sand consolidant.

[0010] The present invention also provides the application of the above-mentioned high-permeability sand consolidant in sand control of oil wells.

[0011] During specific application, it includes the following steps: Stir and mix Agent A and Agent B of the sand consolidant according to a mass ratio of 1.00:(1.06 - 1.33).

[0012] Just because of adopting the above scheme, the sand consolidant of the present invention can maintain a high sand consolidation cementing performance while also having a very high permeability retention rate (>80%, 60℃, 24h). The cemented core obtained by using this product has a high compressive strength (>5.0MPa, 300℃, 48h) and excellent high-temperature resistance, and can also maintain a relatively high permeability (>500×10 -3 μm 2 , 300℃, 24h), improving the efficiency and safety of oilfield exploitation. Specific embodiments

[0013] In order to make the purpose, technical solution and advantages of the present invention clearer, the following further elaborates on the present invention in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] The present invention provides a technical solution: A high-permeability sand consolidant.

[0015] Raw materials used in each example: EHSB-40 erucylamidopropyl hydroxysulfobetaine, purchased from Shanghai Yincong New Materials Technology Co., Ltd., with an erucylamidopropyl hydroxysulfobetaine content of 40%; XT 100 type methyl methacrylate-butadiene-styrene terpolymer, purchased from Arkema.

[0016] Example 1:

[0017] This sand consolidator is divided into Agent A and Agent B. Agent A and Agent B are independent during production but are used in combination. Agent A includes the following components: 67 kg of N,N',N"-trimethyldiethylenetriamine, 20 kg of deionized water, 5 kg of EHSB-40 erucylamidopropyl hydroxysulfobetaine, 8 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, and the total of the above components is 100 kg; Agent B includes the following components: 10 kg of triethylene glycol monobutyl ether, 4 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, 86 kg of MF-3285 type trifunctional alicyclic epoxy resin, and the total of the above components is 100 kg.

[0018] It is obtained by the following method:

[0019] Weigh the raw materials according to the ratio. Pour 67 kg of N,N',N"-trimethyldiethylenetriamine into the reaction kettle, start stirring at a speed of 80 r / min, keep the temperature at 25°C - 35°C, first add 20 kg of deionized water to the reaction kettle and then add 5 kg of EHSB-40 erucylamidopropyl hydroxysulfobetaine, stir for 0.5 h, and then add 8 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, continue stirring for 1.0 h. The resulting light yellow micro-gel-like liquid is Agent A of the high-permeability sand consolidator;

[0020] Weigh the raw materials according to the ratio. Add 10 kg of triethylene glycol monobutyl ether to the reaction kettle, start heating, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, add 4 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, keep the temperature at 45°C - 52°C, stir for 0.5 h, and then pour 86 kg of MF-3285 type trifunctional alicyclic epoxy resin into the reaction kettle, continue stirring for 1.0 h, and cool to room temperature. The resulting light yellow viscous liquid is Agent B of the high-permeability sand consolidator.

[0021] After that, the specimens were tested. When testing the specimens of all examples, the agent A and agent B of the sand consolidator were first stirred and mixed as a whole and then added to the quartz sand to prepare the cemented core. The mass ratio of agent A to agent B was 1.00:1.20, and the mass of the sand consolidator was 5% of the mass of the quartz sand. The relevant indexes of compressive strength were tested with reference to Q / SH 10201969-2016 "General Technical Conditions for Sand Consolidators"; the relevant indexes of permeability were tested with reference to SY / T 6572-2003 "Evaluation Method for Resin Performance for Sand Control". The subsequent examples will not be elaborated.

[0022] The performance index test of the sand consolidator specimen in Example 1 is as follows in Table 1

[0023] Table 1

[0024] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 6.1 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 5.6 Permeability retention rate (60℃, 24h, %) 87 <![CDATA[Core permeability after cementation (60 °C, 24 h, 10 -3 μm 2 )]]> 482 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 597

[0025] Example 2:

[0026] This sand consolidator is divided into agent A and agent B. Agent A and agent B are independent during production but are used in combination during use. Agent A includes the following components: 70 kg of N,N',N"-trimethyldiethylenetriamine, 20 kg of deionized water, 4 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, and 6 kg of N,N,N',N'-tetramethyl-1,3-butanediamine. The total of the above components is 100 kg; Agent B includes the following components: 6 kg of triethylene glycol monobutyl ether, 3 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, 91 kg of MF-3285 type trifunctional alicyclic epoxy resin. The total of the above components is 100 kg.

[0027] It is obtained by the following method:

[0028] Weigh the raw materials according to the ratio. Pour 70 kg of N,N',N"-trimethyldiethylenetriamine into the reaction kettle, start stirring at a speed of 80 r / min, keep the temperature at 25°C - 35°C, first add 20 kg of deionized water to the reaction kettle and then add 4 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, stir for 0.5 h, and then add 6 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, continue stirring for 1.0 h. The resulting light yellow micro-gel-like liquid is agent A of the high-permeability sand consolidator;

[0029] Weigh the raw materials according to the ratio. Add 6 kg of triethylene glycol monobutyl ether into the reaction kettle, start heating up, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, add 3 kg For the methyl methacrylate-butadiene-styrene terpolymer of type XT 100, maintain the temperature at 45°C - 52°C, stir for 0.5 h, then pour 91 kg of the trifunctional alicyclic epoxy resin of type MF-3285 into the reaction kettle, continue stirring for 1.0 h, and cool to room temperature. The resulting pale yellow viscous liquid is Agent B of the high-permeability sand consolidant.

[0030] Example 2 The performance indicators of the sand consolidant sample were tested as shown in Table 2 below

[0031] Table 2

[0032] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 6.4 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 5.8 Permeability retention rate (60℃, 24h, %) 81 <![CDATA[Cemented core permeability (60 °C, 24 h, 10 -3 μm 2 )]]> 457 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 549

[0033] Example 3:

[0034] This sand consolidant is divided into Agent A and Agent B. Agent A and Agent B are independent during production but are used in combination during use. Agent A includes the following components: 68 kg of N,N',N"-trimethyldiethylenetriamine, 20 kg of deionized water, 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, and the total of the above components is 100 kg; Agent B includes the following components: 7 kg of triethylene glycol monobutyl ether, 4 kg of the methyl methacrylate-butadiene-styrene terpolymer of type XT 100, 89 kg of the trifunctional alicyclic epoxy resin of type MF-3285, and the total of the above components is 100 kg.

[0035] It is obtained by the following method:

[0036] Weigh the raw materials according to the ratio, pour 68 kg of N,N',N"-trimethyldiethylenetriamine into the reaction kettle, start stirring at a speed of 80 r / min, maintain the temperature at 25°C - 35°C, first add 20 kg of deionized water and then add 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine to the reaction kettle, stir for 0.5 h, and then add 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, continue stirring for 1.0 h. The resulting pale yellow micro-gel-like liquid is Agent A of the high-permeability sand consolidant;

[0037] Weigh the raw materials according to the ratio, add 7 kg of triethylene glycol monobutyl ether to the reaction kettle, start heating up, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, add 4 kg of the methyl methacrylate-butadiene-styrene terpolymer of type XT 100, maintain the temperature at 45°C - 52°C, stir for 0.5 h, then pour 89 kg of the trifunctional alicyclic epoxy resin of type MF-3285 into the reaction kettle, continue stirring for 1.0 h, and cool to room temperature. The resulting pale yellow viscous liquid is Agent B of the high-permeability sand consolidant.

[0038] The performance index test of the sand consolidant sample in Example 3 is as follows in Table 3

[0039] Table 3

[0040] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 6.2 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 5.8 Permeability retention rate (60℃, 24h, %) 84 <![CDATA[Core permeability after cementation (60 °C, 24 h, 10 -3 μm 2 )]]> 466 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 573

[0041] From the test results of the samples in Examples 1, 2, and 3, it can be seen that within a certain range, when the addition amounts of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine and N,N,N',N'-tetramethyl-1,3-butanediamine increase, the core permeability and permeability retention rate will increase accordingly, while the compressive strength will decrease.

[0042] Example 4:

[0043] This sand consolidant is divided into Agent A and Agent B. Agent A and Agent B are independent during production but are used in combination during use. Agent A includes the following components: 68 kg of diethylenetriamine, 20 kg of deionized water, 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, and the total of the above components is 100 kg; Agent B includes the following components: 7 kg of triethylene glycol monobutyl ether, 4 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, 89 kg of MF-3285 type trifunctional alicyclic epoxy resin, and the total of the above components is 100 kg.

[0044] It is obtained by the following method:

[0045] Weigh the raw materials according to the ratio. Pour 68 kg of diethylenetriamine into the reaction kettle, start stirring at a speed of 80 r / min, keep the temperature at 25°C - 35°C, first add 20 kg of deionized water to the reaction kettle and then add 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, stir for 0.5 h, and then add 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, continue stirring for 1.0 h. The resulting light yellow micro-gel-like liquid is Agent A of the sand consolidant;

[0046] Weigh the raw materials according to the ratio. Add 7 kg of triethylene glycol monobutyl ether into the reaction kettle, start heating up, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, add 4 kg XT 100 type methyl methacrylate-butadiene-styrene terpolymer, keep the temperature at 45°C - 52°C, stir for 0.5 h, and then pour 89 kg of MF-3285 type trifunctional alicyclic epoxy resin into the reaction kettle, continue stirring for 1.0 h, and cool to room temperature. The resulting light yellow viscous liquid is Agent B of the sand consolidant.

[0047] The performance index test of the sand consolidant sample in Example 4 is as follows in Table 4

[0048] Table 4

[0049] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 6.5 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 5.9 Permeability retention rate (60℃, 24h, %) 66 <![CDATA[Core permeability after cementation (60 °C, 24 h, 10 -3 μm 2 )]]> 345 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 407

[0050] Compared with Example 3, in the sand consolidating agent prepared in Example 4, the raw material of the main curing agent in Agent A is replaced from N,N',N"-trimethyldiethylenetriamine with the commonly used curing agent raw material diethylenetriamine. The test results show that using diethylenetriamine as the main curing agent in this application can slightly improve the core compressive strength, but will significantly reduce the core permeability and permeability retention rate. This may be because the steric hindrance of diethylenetriamine is small, and the curing reaction with MF-3285 type trifunctional alicyclic epoxy resin is stronger, so that the pore-increasing effect of the pore-increasing agent is blocked at the source.

[0051] Example 5:

[0052] This sand consolidating agent is divided into Agent A and Agent B. Agent A and Agent B are independent during production and are used in combination during use. Agent A includes the following components: 70 kg of N,N',N"-trimethyldiethylenetriamine, 24 kg of deionized water, and 6 kg of N,N,N',N'-tetramethyl-1,3-butanediamine. The total of the above components is 100 kg; Agent B includes the following components: 6 kg of triethylene glycol monobutyl ether, 3 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, and 91 kg of MF-3285 type trifunctional alicyclic epoxy resin. The total of the above components is 100 kg.

[0053] It is obtained by the following method:

[0054] Weigh the raw materials according to the ratio. Pour 70 kg of N,N',N"-trimethyldiethylenetriamine into the reaction kettle, start stirring at a speed of 80 r / min, keep the temperature at 25°C - 35°C, add 24 kg of deionized water to the reaction kettle. After stirring into a light yellow uniform liquid, add 6 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, and continue stirring for 0.5 h. The resulting light yellow transparent liquid is Agent A of the sand consolidating agent;

[0055] Weigh the raw materials according to the ratio. Add 6 kg of triethylene glycol monobutyl ether into the reaction kettle, start heating up, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, add 3 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, keep the temperature at 45°C - 52°C, stir for 0.5 h, then pour 91 kg of MF-3285 type trifunctional alicyclic epoxy resin into the reaction kettle, continue stirring for 1.0 h, and cool to room temperature. The resulting light yellow viscous liquid is Agent B of the sand consolidating agent.

[0056] The performance index test of the sand consolidant sample in Example 5 is as follows in Table 5

[0057] Table 5

[0058] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 6.2 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 5.8 Permeability retention rate (60℃, 24h, %) 70 <![CDATA[Core permeability after cementation (60 °C, 24 h, 10 -3 μm 2 )]]> 382 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 459

[0059] Compared with Example 2, in the sand consolidant prepared in Example 5, the raw material EHSB-40 erucic acid amide propyl hydroxy sulfobetaine in the pore-increasing main agent of Agent A is replaced with deionized water. The test results show that if EHSB-40 erucic acid amide propyl hydroxy sulfobetaine is not added in this application, the core permeability and permeability retention rate obtained will decrease significantly.

[0060] Example 6:

[0061] This sand consolidant is divided into Agent A and Agent B. Agent A and Agent B are independent during production and are used in combination during use. Agent A includes the following components: 68 kg of N,N',N"-trimethyldiethylenetriamine, 20 kg of triethylene glycol monobutyl ether, 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, and the total of the above components is 100 kg; Agent B includes the following components: 7 kg of triethylene glycol monobutyl ether, 4 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, 89 kg of MF-3285 type trifunctional alicyclic epoxy resin, and the total of the above components is 100 kg.

[0062] It is obtained by the following method:

[0063] Weigh the raw materials according to the ratio. Pour 68 kg of N,N',N"-trimethyldiethylenetriamine into the reaction kettle, start stirring at a speed of 80 r / min, keep the temperature at 25°C - 35°C, first add 20 kg of triethylene glycol monobutyl ether to the reaction kettle and then add 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, stir for 0.5 h, then add 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, and continue to stir for 0.5 h. The pale yellow transparent liquid obtained later is Agent A of the sand consolidant;

[0064] Weigh the raw materials according to the ratio. Add 7 kg of triethylene glycol monobutyl ether into the reaction kettle, start heating up, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, add 4 kg XT 100 type methyl methacrylate-butadiene-styrene terpolymer, keep the temperature at 45°C - 52°C, stir for 0.5 h, then pour 89 kg of MF-3285 type trifunctional alicyclic epoxy resin into the reaction kettle, continue to stir for 1.0 h, and cool to room temperature. The pale yellow viscous liquid obtained is Agent B of the sand consolidant.

[0065] The performance index test of the sand consolidant sample in Example 6 is as follows in Table 6

[0066] Table 6

[0067] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 6.4 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 5.9 Permeability retention rate (60℃, 24h, %) 72 <![CDATA[Core permeability after cementation (60 °C, 24 h, 10 -3 μm 2 )]]> 395 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 478

[0068] Compared with Example 3, in the sand consolidant prepared in Example 6, the deionized water in Agent A was replaced with triethylene glycol monobutyl ether. The test results showed that the core permeability and permeability retention rate also decreased significantly. According to the test results of the sample in Example 5, we speculated that the pore-increasing effect of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine in this sand consolidant was closely related to its micellization in the aqueous system.

[0069] Example 7:

[0070] This sand consolidant is divided into Agent A and Agent B. Agent A and Agent B are produced independently and used in combination. Agent A includes the following components: 76 kg of N,N',N"-trimethyldiethylenetriamine, 20 kg of deionized water, and 4 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine. The total of the above components is 100 kg; Agent B includes the following components: 6 kg of triethylene glycol monobutyl ether, 3 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, and 91 kg of MF-3285 type trifunctional alicyclic epoxy resin. The total of the above components is 100 kg.

[0071] It is obtained by the following method:

[0072] Weigh the raw materials according to the ratio. Pour 76 kg of N,N',N"-trimethyldiethylenetriamine into the reaction kettle, and start stirring at a speed of 80 r / min. Keep the temperature at 25°C - 35°C. First add 20 kg of deionized water to the reaction kettle, and then add 4 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, and stir for 1.0 h. The resulting light yellow micro-gel-like liquid is Agent A of the sand consolidant;

[0073] Weigh the raw materials according to the ratio. Add 6 kg of triethylene glycol monobutyl ether to the reaction kettle, start heating, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, add 3 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, keep the temperature at 45°C - 52°C, stir for 0.5 h, then pour 91 kg of MF-3285 type trifunctional alicyclic epoxy resin into the reaction kettle, and continue to stir for 1.0 h. Cool to room temperature. The resulting light yellow viscous liquid is Agent B of the sand consolidant.

[0074] The performance index test of the sand consolidant sample in Example 7 is as follows in Table 7

[0075] Table 7

[0076] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 6.4 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 5.9 Permeability retention rate (60℃, 24h, %) 75 <![CDATA[Core permeability after cementation (60 °C, 24 h, 10 -3 μm 2 )]]> 427 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 495

[0077] Compared with Example 2, in the sand consolidating agent prepared in Example 7, the part of the raw material of N,N,N',N'-tetramethyl-1,3-butanediamine in Agent A was replaced with an equal amount of N,N',N"-trimethyldiethylenetriamine. As a result, the core permeability and the permeability retention rate decreased. This indicates that adding an appropriate amount of N,N,N',N'-tetramethyl-1,3-butanediamine in this application helps EHSB-40 erucylamidopropyl hydroxysulfobetaine play a better pore-increasing role. This may be because N,N,N',N'-tetramethyl-1,3-butanediamine has a good steric hindrance effect, which can reduce the density of the resin curing reaction in space to a certain extent.

[0078] Example 8:

[0079] This sand consolidating agent is divided into Agent A and Agent B. Agent A and Agent B are independent during production and are used in combination during use. Agent A includes the following components: 68 kg of N,N',N"-trimethyldiethylenetriamine, 20 kg of deionized water, 5 kg of EHSB-40 erucylamidopropyl hydroxysulfobetaine, and 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine. The total of the above components is 100 kg; Agent B includes the following components: 11 kg of triethylene glycol monobutyl ether and 89 kg of MF-3285 type trifunctional alicyclic epoxy resin. The total of the above components is 100 kg.

[0080] It is obtained by the following method:

[0081] Weigh the raw materials according to the ratio. Pour 68 kg of N,N',N"-trimethyldiethylenetriamine into the reaction kettle, start stirring at a speed of 80 r / min, keep the temperature at 25°C - 35°C, first add 20 kg of deionized water to the reaction kettle, then add 5 kg of EHSB-40 erucylamidopropyl hydroxysulfobetaine, stir for 0.5 h, and then add 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, and continue to stir for 1.0 h. The resulting light yellow micro-gel-like liquid is Agent A of the sand consolidating agent;

[0082] Weigh the raw materials according to the ratio. Add 11 kg of triethylene glycol monobutyl ether into the reaction kettle, start heating, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, pour in 89 kg of MF-3285 type trifunctional alicyclic epoxy resin, keep the temperature at 45°C - 52°C, stir for 0.5 h, and cool to room temperature. The resulting light yellow viscous liquid is Agent B of the sand consolidating agent.

[0083] The performance index test of the sand consolidating agent sample in Example 8 is as follows in Table 8

[0084] Table 8

[0085] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 5.5 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 4.3 Permeability retention rate (60℃, 24h, %) 83 <![CDATA[Core permeability after cementation (60°C, 24 h, 10 -3 μm 2 )]]> 457 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 562

[0086] Compared with Example 3, the sand consolidating agent prepared in Example 8 has XT 100 methyl methacrylate-butadiene-styrene terpolymer was replaced with triethylene glycol monobutyl ether. The test results showed that when this application was not added The compressive strength of the cemented cores with XT 100 methyl methacrylate-butadiene-styrene terpolymer decreased, which may be related to The toughening effect of XT 100 methyl methacrylate-butadiene-styrene terpolymer is related.

[0087] Embodiment nine:

[0088] The sand consolidating agent is divided into A and B. A and B are independent of each other during production but are used in combination. A comprises the following components: 68 kg N,N',N"-trimethyldiethylenetriamine, 20 kg deionized water, 5 kg EHSB-40 erucic acid amide propyl hydroxysulfonyl betaine, 7 kg N,N,N',N'-tetramethyl-1,3-butanediamine, and the total of the above components is 100 kg; B comprises the following components: 7 kg triethylene glycol monobutyl ether, 4kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, 89kg of E-51 type epoxy resin, and the total weight of the above components is 100kg.

[0089] Obtained as follows:

[0090] Weigh the raw materials according to the ratio, pour 68kg N,N',N"-trimethyldiethylenetriamine into the reactor, start stirring at a speed of 80r / min, keep the temperature at 25℃-35℃, add 20kg deionized water and then 5kg EHSB-40 erucic acid amide propyl hydroxysulfonyl betaine into the reactor, stir for 0.5h, then add 7kg N,N,N',N'-tetramethyl-1,3-butanediamine, continue stirring for 1.0h, and the light yellow micro-colloidal liquid obtained is the A agent of the sand consolidating agent;

[0091] Weigh the raw materials according to the ratio, add 7kg of triethylene glycol monobutyl ether into the reactor, start heating, and start stirring at a speed of 130r / min. When the temperature reaches 45℃, add 4kg XT 100 type methyl methacrylate-butadiene-styrene terpolymer, maintain the temperature at 45℃-52℃, stir for 0.5h, then pour 89kg of E-51 type epoxy resin into the reactor, continue stirring for 1.0h, cool to room temperature, and the obtained light yellow viscous liquid is Agent B of the sand consolidating agent.

[0092] Example 9. The performance indicators of the sand consolidant sample were tested as shown in Table 9 below

[0093] Table 9

[0094] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 5.0 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 2.9 Permeability retention rate (60℃, 24h, %) 89 <![CDATA[Core permeability after cementation (60 °C, 24 h, 10 -3 μm 2 )]]> 489 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 611

[0095] Compared with Example 3, in the sand consolidant prepared in Example 9, the MF-3285 type trifunctional alicyclic epoxy resin in Agent B was replaced with the commonly used E-51 type epoxy resin in the sand consolidant. It was found that the compressive strength of the cemented core decreased significantly, especially under high-temperature conditions, and it basically could not meet the use requirements. This may be because the curing reaction activity of the E-51 type epoxy resin is not as good as that of the MF-3285 type trifunctional alicyclic epoxy resin, and the curing reaction strength with N,N',N"-trimethyldiethylenetriamine with some steric hindrance is not high enough. The decrease in the cementing strength led to a slight increase in the permeability of the cemented core, which can also prove from the side that Agent A of the sand consolidant in this application does have a good effect in maintaining permeability.

[0096] Example 10:

[0097] This sand consolidant is divided into Agent A and Agent B. Agent A and Agent B are independent during production and are used in combination during use. Agent A includes the following components: 75 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, 20 kg of deionized water, and 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine. The total of the above components is 100 kg; Agent B includes the following components: 7 kg of triethylene glycol monobutyl ether 4 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, 89 kg of MF-3285 type trifunctional alicyclic epoxy resin. The total of the above components is 100 kg.

[0098] It is obtained by the following method:

[0099] Weigh the raw materials according to the ratio. Pour 75 kg of N,N,N',N'-tetramethyl-1,3-butanediamine into the reaction kettle, and start stirring at a speed of 80 r / min. Keep the temperature at 25°C - 35°C. First add 20 kg of deionized water to the reaction kettle, and then add 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, and stir for 1.0 h. The pale yellow micro-gel-like liquid obtained later is Agent A of the sand consolidant;

[0100] Weigh the raw materials according to the ratio. Add 7 kg of triethylene glycol monobutyl ether to the reaction kettle, start heating, and start stirring at a speed of 130 r / min. When the temperature reaches 45°C, add 4 kg For the methyl methacrylate-butadiene-styrene terpolymer of type XT 100, maintain the temperature at 45°C - 52°C, stir for 0.5 h, then pour 89 kg of trifunctional alicyclic epoxy resin of type MF-3285 into the reaction kettle, continue to stir for 1.0 h, and cool to room temperature. The resulting light yellow viscous liquid is Agent B of the sand consolidant.

[0101] Example Ten. The performance indicators of the sand consolidant sample are tested as shown in Table 10 below

[0102] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 3.2 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 1.1

[0103] Compared with Example Three, in the sand consolidant prepared in Example Ten, the part of the raw material of N,N',N"-trimethyldiethylenetriamine in the curing main agent in Agent A is replaced by N,N,N',N'-tetramethyl-1,3-butanediamine. That is, in Example Ten, N,N,N',N'-tetramethyl-1,3-butanediamine is used as the curing main agent without N,N',N"-trimethyldiethylenetriamine. However, after testing the compressive strength of the cemented core, the result is not ideal and cannot meet the use requirements. Therefore, the related indexes of permeability are not tested anymore. It is speculated that the reason may be that both amine groups in N,N,N',N'-tetramethyl-1,3-butanediamine are tertiary amine groups, and the steric hindrance is too large, which affects the curing reaction activity and results in a relatively poor cementing strength of the cemented core.

[0104] Example Eleven:

[0105] This sand consolidant is divided into Agent A and Agent B. Agent A and Agent B are independent during production and are used in combination during use. Agent A includes the following components: 68 kg of N,N',N"-trimethyldiethylenetriamine, 20 kg of deionized water, 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine, 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, and the total of the above components is 100 kg; Agent B includes the following components: 7 kg of triethylene glycol monobutyl ether, 4 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer, 89 kg of cyclohexane-1,2-dicarboxylic acid diglycidyl ester, and the total of the above components is 100 kg.

[0106] Obtained by the following method:

[0107] Weigh the raw materials according to the ratio, pour 68 kg of N,N',N"-trimethyldiethylenetriamine into the reaction kettle, start stirring at a speed of 80 r / min, maintain the temperature at 25°C - 35°C, first add 20 kg of deionized water and then add 5 kg of EHSB-40 erucic acid amide propyl hydroxy sulfobetaine to the reaction kettle, stir for 0.5 h, and then add 7 kg of N,N,N',N'-tetramethyl-1,3-butanediamine, continue to stir for 1.0 h. The resulting light yellow micro-gel liquid is Agent A of the sand consolidant;

[0108] Weigh the raw materials according to the ratio. Add 7 kg of triethylene glycol monobutyl ether into the reaction kettle, start heating, and start stirring at a speed of 130 r / min. When the temperature reaches 45 °C, add 4 kg of XT 100 type methyl methacrylate-butadiene-styrene terpolymer. Keep the temperature at 45 °C - 52 °C and stir for 0.5 h. Then pour 89 kg of cyclohexane-1,2-dicarboxylic acid diglycidyl ester into the reaction kettle and continue stirring for 1.0 h. Cool to room temperature. The obtained light yellow viscous liquid is the component B of the sand consolidant.

[0109] Example XI. The performance indexes of the sand consolidant sample are tested as shown in Table 11 below

[0110] Project Index Compressive strength of cemented core (60℃, 48h, MPa) 4.0 Compressive strength of high-temperature cemented core (300℃, 48h, MPa) 2.7 Permeability retention rate (60℃, 24h, %) 90 <![CDATA[Core permeability after cementation (60 °C, 24 h, 10 -3 μm 2 )]]> 502 <![CDATA[Core permeability after high-temperature cementation (300 °C, 24 h, 10 -3 μm 2 )]]> 637

[0111] Compared with Example III, in the sand consolidant prepared in Example XI, the MF-3285 type trifunctional alicyclic epoxy resin in component B is replaced with cyclohexane-1,2-dicarboxylic acid diglycidyl ester with a relatively similar structure. It is found that the compressive strength of the cemented core obtained is still quite different, but the permeability performance index is more excellent. It is speculated that the reason may be that cyclohexane-1,2-dicarboxylic acid diglycidyl ester has one less ethylene oxide at the end connected to cyclohexane compared with the MF-3285 type trifunctional alicyclic epoxy resin, resulting in significantly lower strength of the curing cross-linking reaction with N,N',N"-trimethyldiethylenetriamine with some steric hindrance than that of the MF-3285 type trifunctional alicyclic epoxy resin.

[0112] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the present invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments. Any improvements and modifications made by those skilled in the art according to the principles of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention. The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high permeability sand consolidating agent, characterized in that: The sand consolidating agent comprises an agent A and an agent B. In terms of weight percentage, the agent A comprises the following components: 67%-70% of N,N',N"-trimethyldiethylenetriamine, 19%-21% of deionized water, 4%-5% of amidopropylhydroxysulfonyl betaine viscoelastic surfactant, 6%-8% of N,N,N',N'-tetramethyl-1,3-butanediamine, and the total of the above components is 100%; the agent B comprises the following components: 6%-10% of triethylene glycol monobutyl ether, 3%-4% of methyl methacrylate-butadiene-styrene terpolymer, and 86%-91% of MF-3285 trifunctional alicyclic epoxy resin, and the total of the above components is 100%; the mass ratio of the agent A to the agent B in the sand consolidating agent is 1.00:(1.06-1.33).

2. The high permeability sand consolidating agent according to claim 1, characterized in that: The amidopropyl hydroxysulfonyl betaine viscoelastic surfactant is selected from erucic acid amidopropyl hydroxysulfonyl betaine.

3. The high permeability sand consolidating agent according to claim 2, characterized in that: The concentration of the erucamidopropyl hydroxysulfobetaine is 40%.

4. The method for preparing the high permeability sand consolidating agent according to any one of claims 1 to 3, characterized in that: The steps include: Production process of agent A: weigh the raw materials according to the ratio, pour N,N',N"-trimethyldiethylenetriamine into the reactor, and start stirring at a speed of 60r-100r / min, keep the temperature at 15℃-40℃, add deionized water and amidopropyl hydroxysulfonyl betaine viscoelastic surfactant to the reactor, stir for 0.5-1.0h, then add N,N,N',N'-tetramethyl-1,3-butanediamine, continue stirring for 0.5-1.0h, and the light yellow micro-colloidal liquid obtained is agent A of high permeability sand consolidating agent; Production process of Agent B: Weigh the raw materials according to the ratio, add triethylene glycol monobutyl ether into the reactor, start heating, and start stirring at a speed of 90r-130r / min. When the temperature reaches 45°C, add methyl methacrylate-butadiene-styrene terpolymer, maintain the temperature at 45°C-52°C, stir for 0.5-1.0h, then pour MF-3285 trifunctional alicyclic epoxy resin into the reactor, continue stirring for 0.5-1.0h, cool to room temperature, and the resulting light yellow viscous liquid is Agent B of the high permeability sand consolidating agent.

5. Use of the high-permeability sand-fixing agent according to any one of claims 1 to 3 or the high-permeability sand-fixing agent prepared by the method according to claim 4 in oil well sand control.

6. The use according to claim 5, characterized in that: The method comprises the following steps: mixing agent A and agent B of the sand consolidating agent in a mass ratio of 1.00:(1.06-1.33).