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Nanometer blocking agent and preparation method thereof

A nano plugging agent and emulsifier technology, applied in the field of oil drilling, can solve the problems of small force between nanoparticles and formation, affecting the plugging effect, easy to separate again, etc., to improve the heat resistance effect, improve the plugging effect, The effect of increasing the consistency

Active Publication Date: 2021-09-17
北京宏勤石油助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used nano-sealing agents are mainly inorganic nano-sealing agents, which bridge and seal micro-cracks in shale formations. Although the plugging effect is good, the force between the nanoparticles and the formation Small, difficult to stay in the pores, easy to detach again, affecting the sealing effect

Method used

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  • Nanometer blocking agent and preparation method thereof
  • Nanometer blocking agent and preparation method thereof
  • Nanometer blocking agent and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1-5

[0042] The polylactic acid preparation example 1-5 is selected from Shandong Institute of Medical Devices, the molecular weight is 30000, and the model is DL; 1-octyl-3-methylimidazolium tetrafluoroborate is selected from Linzhou Keneng Materials Technology Co., Ltd., CAS No. 86560-94-6; triallyl isocyanurate is selected from Guangxi Tengjun Biotechnology Co., Ltd., product number is TJ-011-1; tin powder is selected from Nangong Dinghong Metal Materials Co., Ltd., the product number is 354, and 1-ethyl-3-methylimidazolium tetrafluoroborate is selected from Mooney Chemical Technology (Shanghai) Co., Ltd., and the CAS number is 143314-16-3.

preparation example 1

[0043] Preparation Example 1: (1) Dissolve 2kg of polylactic acid in 50kg of chloroform, add 1kg of 1-octyl-3-methylimidazolium tetrafluoroborate, and place it on a cobalt-60 source with an irradiation rate of 2.2kGy / h After irradiating 10kGy, precipitate with methanol and dry at 60°C for 2h. The mass ratio of polylactic acid and 1-octyl-3-methylimidazolium tetrafluoroborate is 2:1; (2) the step (1) The resultant is mixed with 1kg of triallyl isocyanurate, 0.2kg of tin powder and 2kg of solvent, heated to 190°C under vacuum, reacted for 2h, cooled to 140°C, kept for 0.5h, cooled to room temperature, pulverized, triene The mass ratio of propyl isocyanurate, tin powder, solvent and polylactic acid is 0.5:0.1:1:1, and the solvent is dichloromethane.

preparation example 2

[0044] Preparation Example 2: (1) Dissolve 3.5kg of polylactic acid in 55kg of chloroform, add 1kg of 1-octyl-3-methylimidazolium tetrafluoroborate, and use a cobalt-60 source with an irradiation rate of 2.3kGy / h After irradiating 10kGy, precipitate with methanol and dry at 70°C for 1.5h. The mass ratio of polylactic acid and 1-octyl-3-methylimidazolium tetrafluoroborate is 3.5:1; (2) the step ( 1) Mix the resultant with 2.1kg of triallyl isocyanurate, 0.7kg of tin powder and 7kg of solvent, vacuumize and heat to 190°C, react for 2h, cool down to 140°C, keep warm for 0.5h, cool down to room temperature, and pulverize , the mass ratio of triallyl isocyanurate, tin powder, solvent and polylactic acid is 0.6:0.2:2:1, and the solvent is dichloromethane.

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Abstract

The invention relates to the field of petroleum drilling, and particularly discloses a nanometer plugging agent and a preparation method thereof. The nanometer plugging agent is prepared from the following raw materials in parts by weight: 10 to 50 parts of vinyl monomer, 10 to 25 parts of allyl monomer, 5 to 15 parts of sodium methacrylate sulfonate, 2 to 10 parts of an emulsifier, 1 to 1.5 parts of an initiator, 15 to 55 parts of water, 5 to 10 parts of an organic emulsion, 15 to 25 parts of a filler and 5 to 10 parts of sepiolite. The organic emulsion is prepared from the following components in parts by weight: 1 to 1.5 parts of polylactic acid, 0.5 to 1 part of lignocellulose, 1 to 4 parts of stannic chloride, 0.3 to 0.5 part of sodium dodecyl benzene sulfonate, 0.1 to 0.2 part of benzimidazole, 0.5 to 1 part of gelatin, 2 to 3 parts of dimethyl sulfoxide and 1 to 1.5 parts of white oil. The nanometer plugging agent can plug micro-nano gaps, acting force between nano-particles and the stratum is large, the nano-particles are not prone to being separated from the gaps, a plugging rate is high, and high temperature resistance is high.

Description

technical field [0001] The application relates to the technical field of petroleum drilling, more specifically, it relates to a nano-sealing agent and a preparation method thereof. Background technique [0002] Well collapse is one of the most serious and complex situations in the oil and gas drilling process. The wellbore stability of the shale formation in oil and gas drilling has always been an important responsibility of the drilling fluid. Therefore, it is necessary to rely on the tight sealing effect of the anti-slump plugging agent used in drilling fluids to improve the stability of the well wall. [0003] At present, the particle size of commonly used plugging materials is between 0.1-100Um, which is mainly suitable for plugging 0.1-1mm formation pore throats and cracks, and it is difficult to enter the mud shale to form an inner filter cake plugging layer, which cannot achieve good results. Therefore, nano-sized plugging agents must be added to the drilling fluid. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/514C09K8/508C09K8/504C09K8/24C09K8/03
CPCC09K8/5083C09K8/5086C09K8/5045C09K8/514C09K8/03C09K8/24
Inventor 曹何山
Owner 北京宏勤石油助剂有限公司
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