Emulsion type paraffin remover and inhibitor as well as preparation method and application thereof
Through the use of emulsion-type wax cleaning agent, the problems of incomplete wax cleaning and poor wax protection effect of oil wells have been solved, better wax cleaning and wax protection effect have been achieved, and application safety has been improved.
Patent Information
- Application Number
- CN202411712019.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-02-25
AI Technical Summary
The existing oil well wax cleaners and wax anti-wax agents have problems such as incomplete wax cleaning, poor wax anti-wax effect, and poor application safety.
Emulsion type wax-proofing agent is used, and the raw materials are 7% to 10%, active agent 10% to 25%, penetrant 0.5% to 3%, oily solvent 15% to 25%, and the rest is water. Through specific formulations and preparation methods, emulsion-type wax-cleaning agents that can quickly penetrate, disperse, peel and dissolve waxes are formed.
It realizes the superposition effect of oil well wax cleaning and wax prevention, effectively extends the oil well wax cleaning cycle, and has high application safety.
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of oil well wax removal and prevention, and is an emulsion wax removal and prevention agent and a preparation method and application thereof. Background Art
[0002] During the crude oil production process, due to the decrease in formation temperature and pressure conditions and the escape of light hydrocarbons, the wax dissolved in the crude oil will precipitate in the form of crystals and adsorb on the oil pipe wall, casing wall, oil pump, and other oil production equipment, and even form wax deposits in the oil layer, affecting the normal production of the oil well. Certain measures must be taken to remove the deposited wax.
[0003] The reasons for wax deposition in oil wells are due to factors such as the composition, pressure and dissolved gas of petroleum, colloids and asphaltene in crude oil, mechanical impurities in crude oil, crude oil flow velocity, surface roughness and surface properties of oil well pipes.
[0004] At present, the most commonly used wax cleaning methods are hot washing wax cleaning, chemical wax cleaning and chemical wax prevention. Each wax cleaning method has certain disadvantages. Hot washing wax cleaning mainly uses a heat carrier that is a fluid substance heated on the ground, such as water or oil. The hot fluid circulates in the wellbore to transfer heat to the wellbore fluid, thereby increasing the temperature of the wellbore fluid, causing the wax to melt and then dissolve in the crude oil, thereby achieving the purpose of wax cleaning. The effect of hot washing wax cleaning is significantly affected by temperature, and the temperature drops significantly with the depth of the well. Each hot washing wax cleaning will cause the insoluble wax in the deep oil well to be not cleaned thoroughly; chemical wax cleaning uses oil-based wax cleaning agents to clean wax. Due to the low flash point of oil-based wax cleaning agents, the safety of chemical wax cleaning is poor; chemical wax prevention agents mainly use activators for wax prevention, and wax prevention is carried out by continuously adding activators. The continuity and dosage of the agent addition are difficult to control, which is more likely to cause wax precipitation in the oil well.
[0005] In summary, there is an urgent need for an oil well paraffin cleaning and prevention agent that can be used for post-wax cleaning and paraffin prevention of oil wells, and can simultaneously achieve chemical paraffin cleaning effects and chemical paraffin prevention effects, with superimposed effects, effectively extending the oil well paraffin cleaning cycle. Summary of the invention
[0006] The present invention provides an emulsion type wax remover and wax preventer, a preparation method and an application thereof, which overcome the deficiencies of the above-mentioned prior art and can effectively solve the problems of incomplete wax removal, poor wax preventer effect and poor application safety existing in the prior wax removers and wax preventers used in oil wells.
[0007] One of the technical solutions of the present invention is achieved by the following measures: an emulsion type wax remover and wax inhibitor, wherein the raw materials are 7% to 10% of a stabilizer, 10% to 25% of an active agent, 0.5% to 3% of a penetrant, 15% to 25% of an oily solvent, and the rest is water, and the emulsion type wax remover and wax inhibitor is prepared according to the following steps: The first step is to dissolve a required amount of stabilizer in water, and after it is fully dissolved, a first solution is obtained; The second step is to mix the required amount of active agent, penetrant and oily solvent to obtain a second solution; The third step is to add the first solution into the second solution and stir until it is completely dissolved to obtain an emulsion type wax remover and inhibitor.
[0008] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions: In the first step, the stabilizer is sodium polyacrylate.
[0009] In the above second step, the active agent is alkyl glycoside.
[0010] The alkyl glucoside is one of coconut glucoside and decyl glucoside.
[0011] In the above second step, the penetrant is water-soluble azone.
[0012] In the second step, the oily solvent is one of d-limonene, 1,3-cyclohexadiene and cyclooctatetraene.
[0013] The second technical solution of the present invention is achieved by the following measures: a method for preparing an emulsion type wax remover and inhibitor, comprising: The first step is to dissolve a required amount of stabilizer in water, and after it is fully dissolved, a first solution is obtained; The second step is to mix the required amount of active agent, penetrant and oily solvent to obtain a second solution; The third step is to add the first solution into the second solution and stir until it is completely dissolved to obtain an emulsion type wax remover and inhibitor.
[0014] The third technical solution of the present invention is achieved through the following measures: application of an emulsion type wax removal and prevention agent, and application of the emulsion type wax removal and prevention agent in oil well wax removal and prevention.
[0015] The emulsion type wax removing and preventing agent for oil wells of the present invention can be used in the process of oil well exploitation, and can quickly penetrate into the wax gaps formed on the oil well pipe string, play the role of dispersing, stripping and dissolving wax, and achieve the wax removing effect. The active agent components in the agent slowly dissolve in the produced fluid, and play the role of preventing wax. The emulsion type wax removing and preventing agent can combine the advantages of oil-soluble wax removing agents and chemical wax preventing agents, achieve better wax removing and preventing effects, and have higher application safety. DETAILED DESCRIPTION
[0016] The present invention is not limited by the following embodiments, and the specific implementation method can be determined according to the technical scheme of the present invention and the actual situation. Unless otherwise specified, the various chemical reagents and chemicals mentioned in the present invention are all chemical reagents and chemicals known and used in the prior art; unless otherwise specified, the percentages in the present invention are all weight percentages; unless otherwise specified, the solutions in the present invention are all aqueous solutions with water as the solvent, for example, hydrochloric acid solution is a hydrochloric acid aqueous solution; the normal temperature and room temperature in the present invention generally refer to a temperature of 15°C to 25°C, and are generally defined as 25°C.
[0017] The present invention will be further described below in conjunction with embodiments: Example 1: The emulsion type wax remover and wax inhibitor, the raw materials are 7% to 10% of stabilizer, 10% to 25% of active agent, 0.5% to 3% of penetrant, 15% to 25% of oily solvent, and the rest is water. The emulsion type wax remover and wax inhibitor is prepared according to the following steps: The first step is to dissolve a required amount of stabilizer in water, and after it is fully dissolved, a first solution is obtained; The second step is to mix the required amount of active agent, penetrant and oily solvent to obtain a second solution; The third step is to add the first solution into the second solution and stir until it is completely dissolved to obtain an emulsion type wax remover and inhibitor.
[0018] Example 2: As an optimization of the above example, in the first step, the stabilizer is sodium polyacrylate.
[0019] Example 3: As an optimization of the above example, in the second step, the active agent is an alkyl glycoside.
[0020] Example 4: As an optimization of the above example, the alkyl glucoside is one of coconut glucoside and decyl glucoside.
[0021] Embodiment 5: As the optimization of the above embodiment, in the second step, the penetrant is water-soluble azone.
[0022] Example 6: As an optimization of the above example, in the second step, the oily solvent is one of d-limonene, 1,3-cyclohexadiene and cyclooctatetraene.
[0023] Embodiment 7: The preparation method of the emulsion type wax removing and preventing agent comprises: The first step is to dissolve the required amount of stabilizer in water by weight, and obtain a first solution after it is fully dissolved; The second step is to mix the required amount of active agent, penetrant and oily solvent to obtain a second solution; The third step is to add the first solution into the second solution and stir until it is completely dissolved to obtain an emulsion type wax remover and inhibitor.
[0024] Example 8: Application of the emulsion type wax removal and prevention agent, application of the emulsion type wax removal and prevention agent in oil well wax removal and prevention.
[0025] Embodiment 9: As an optimization of the above embodiment, a method for preparing an emulsion type wax remover and inhibitor comprises: The first step is to dissolve 7 to 10 parts of a stabilizer in water by weight, and obtain a first solution after the stabilizer is fully dissolved; The second step is to mix 10 to 25 parts of the active agent, 0.5 to 3 parts of the penetrant and 15 to 25 parts of the oily solvent by weight to obtain a second solution; The third step is to add the first solution into the second solution and stir until completely dissolved to obtain an emulsion type wax remover and wax inhibitor. The raw materials of the emulsion type wax remover and wax inhibitor are calculated by weight as 7% to 10% stabilizer, 10% to 25% active agent, 0.5% to 3% penetrant, 15% to 25% oily solvent, and the rest is water.
[0026] Embodiment 10: As an optimization of the above embodiment, a method for preparing an emulsion type wax remover and inhibitor comprises: The first step is to dissolve 7 parts of sodium polyacrylate in water by weight until it is fully dissolved to obtain a first solution; The second step is to mix 25 parts of coco-glucoside, 3 parts of water-soluble azone and 25 parts of limonene by weight to obtain a second solution; The third step is to add the first solution into the second solution and stir until completely dissolved to obtain an emulsion type wax remover and wax inhibitor. The emulsion type wax remover and wax inhibitor comprises, by weight percentage, 7% sodium polyacrylate, 25% coconut glucoside, 3% water-soluble azone, 25% limonene, and the remainder is water.
[0027] Embodiment 11: As an optimization of the above embodiment, a method for preparing an emulsion type wax remover and inhibitor comprises: The first step is to dissolve 10 parts by weight of sodium polyacrylate in water until it is fully dissolved to obtain a first solution; The second step is to mix 10 parts of coconut glucoside, 0.5 parts of water-soluble azone and 25 parts of limonene by weight to obtain a second solution; The third step is to add the first solution into the second solution and stir until completely dissolved to obtain an emulsion type wax remover and wax inhibitor. The emulsion type wax remover and wax inhibitor comprises, by weight percentage, 10% sodium polyacrylate, 10% coconut glucoside, 0.5% water-soluble azone, 25% limonene, and the remainder is water.
[0028] Embodiment 12: As an optimization of the above embodiment, a method for preparing an emulsion type wax remover and inhibitor comprises: The first step is to dissolve 7 parts of sodium polyacrylate in water by weight until it is fully dissolved to obtain a first solution; The second step is to mix 25 parts of decyl glucoside, 3 parts of water-soluble azone and 25 parts of 1,3-cyclohexadiene by weight to obtain a second solution; The third step is to add the first solution into the second solution and stir until completely dissolved to obtain an emulsion type wax remover and wax inhibitor. The emulsion type wax remover and wax inhibitor comprises, by weight percentage, 7% sodium polyacrylate, 25% decyl glucoside, 3% water-soluble azone, 25% 1,3-cyclohexadiene, and the remainder is water.
[0029] Embodiment 13: As an optimization of the above embodiment, a method for preparing an emulsion type wax remover and inhibitor comprises: The first step is to dissolve 10 parts by weight of sodium polyacrylate in water until it is fully dissolved to obtain a first solution; The second step is to mix 10 parts of decyl glucoside, 3 parts of water-soluble azone and 25 parts of 1,3-cyclohexadiene by weight to obtain a second solution; The third step is to add the first solution into the second solution and stir until completely dissolved to obtain an emulsion type wax remover and wax inhibitor. The emulsion type wax remover and wax inhibitor comprises, by weight percentage, 10% sodium polyacrylate, 10% decyl glucoside, 3% water-soluble azone, 25% 1,3-cyclohexadiene, and the remainder is water.
[0030] Comparative Example 1: The paraffin remover is a commercially available mixed benzene paraffin remover.
[0031] Comparative Example 2: The paraffin remover is a commercially available xylene paraffin remover.
[0032] Comparative Example 3: The wax remover is composed of 93% organic solvent (mixed benzene), 2% penetrant (dodecylbenzene sulfonic acid), and 5% flame retardant.
[0033] Comparative Example 4: The paraffin remover is composed of 98% organic solvent (xylene) and 2% penetrant (dodecylbenzene sulfonic acid).
[0034] Comparative Example 5: The wax anti-wax agent is composed of 25% polyether activator, 25% sodium dodecylbenzene sulfonate, and the rest is water.
[0035] The present invention (emulsion type wax removal and prevention agent) and comparative examples 1 to 4 (wax removal agent) and comparative example 5 (wax prevention agent) in the above-mentioned Examples 10 to 13 were respectively tested for wax removal and prevention effects on a wax sample of a certain oil well, with a total of 9 equal weight test samples (4 samples of the present invention and 5 samples of the comparative example). First, the density (g / mL) and flash point (°C) of each sample were tested separately, as shown in Table 1; then, the wax sample in the same oil well was evenly divided into 9 wax samples, and under the same test environment temperature conditions (other test conditions were the same), 9 test samples were put into 9 wax samples; finally, after the required time for dissolution (the dissolution time of the 8 wax samples was the same), the wax dissolution rate (g / min) and wax prevention rate (%) of the 9 test samples to the 9 wax samples were tested separately, as shown in Table 1.
[0036] From Table 1, we can see that: (1) The present invention (emulsion type wax removal and prevention agent) is compared with comparative example 1 (commercially available mixed benzene wax removal agent) and comparative example 2 (commercially available xylene wax removal agent). The wax dissolving rate and wax prevention rate of the present invention are higher than those of comparative examples 1 and 2; the average density and flash point of the present invention are higher than those of comparative examples 1 and 2, and comparative examples 1 and 2 are toxic and harmful chemical agents, indicating that the present invention has higher safety performance; (2) The present invention (emulsion type wax removal and wax prevention agent) is compared with comparative example 3 (mixed benzene 93%, dodecylbenzene sulfonic acid 2%, flame retardant 5%) and comparative example 4 (xylene 98%, dodecylbenzene sulfonic acid 2%). The wax dissolving rate and wax prevention rate of the present invention are higher than those of comparative examples 3 and 4. The average density and flash point of the present invention are higher than those of comparative examples 3 and 4. Moreover, comparative examples 3 and 4 are toxic and harmful chemical agents, indicating that the present invention has high safety performance. (3) The wax dissolving rate and wax preventing rate of the present invention (emulsion type wax removing and preventing agent) are compared with comparative example 5 (polyether active agent 25%, sodium dodecylbenzene sulfonate 25%, and the rest is water).
[0037] In summary, the present invention is applied to oil well paraffin removal and paraffin prevention, has good paraffin removal and paraffin prevention effects, and has high application safety performance.
[0038] The above technical features respectively constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.
Claims
1. An emulsion type wax remover and inhibitor, characterized in that The raw materials are 7% to 10% of stabilizer, 10% to 25% of active agent, 0.5% to 3% of penetrant, 15% to 25% of oily solvent, and the rest is water. The emulsion type wax remover and inhibitor is prepared according to the following steps: The first step is to dissolve a required amount of stabilizer in water, and after it is fully dissolved, a first solution is obtained; The second step is to mix the required amount of active agent, penetrant and oily solvent to obtain a second solution; The third step is to add the first solution into the second solution and stir until it is completely dissolved to obtain an emulsion type wax remover and inhibitor.
2. The emulsion type wax remover and inhibitor according to claim 1, characterized in that In the first step, the stabilizer is sodium polyacrylate.
3. The emulsion type wax remover and inhibitor according to claim 1, characterized in that In the second step, the active agent is an alkyl glycoside.
4. The emulsion type wax remover and inhibitor according to claim 2, characterized in that In the second step, the active agent is an alkyl glycoside.
5. The emulsion type wax remover and inhibitor according to claim 3, characterized in that The alkyl glucoside is one of cocoyl glucoside and decyl glucoside.
6. The emulsion type wax remover and inhibitor according to any one of claims 1 to 5, characterized in that In the second step, the penetrant is a water-soluble azone.
7. The emulsion type wax remover and inhibitor according to any one of claims 1 to 5, characterized in that In the second step, the oily solvent is one of d-limonene, 1,3-cyclohexadiene and cyclooctatetraene.
8. The emulsion type wax remover and inhibitor according to claim 6, characterized in that In the second step, the oily solvent is one of d-limonene, 1,3-cyclohexadiene and cyclooctatetraene.
9. A method for preparing the emulsion type wax remover and inhibitor according to any one of claims 1 to 8, characterized in that include: The first step is to dissolve a required amount of stabilizer in water, and after it is fully dissolved, a first solution is obtained; The second step is to mix the required amount of active agent, penetrant and oily solvent to obtain a second solution; The third step is to add the first solution into the second solution and stir until it is completely dissolved to obtain an emulsion type wax remover and inhibitor.
10. Use of the emulsion type paraffin removal and prevention agent according to any one of claims 1 to 8 in oil well paraffin removal and prevention.