Reservoir drilling fluid system and preparation method thereof

A drilling and liquid technology, applied in the field of reservoir drilling fluid system and its preparation, can solve problems such as detonation, complex types of drilling fluid components, complex preparation methods, etc., to achieve improved compatibility and dispersibility, excellent flowback solution Blocking performance, the effect of improving the suppression effect

Active Publication Date: 2022-05-27
山东维斯特尔石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the type of drilling fluid components is relatively complex, the compatibility is not good, and the preparation steps of the nano-membrane structure plugging agent are cumbersome, and the requirements for the control of reaction conditions are relatively high. The reaction involves processes such as chain extension, which is prone to explosion. Defects such as poly
[0005] CN105969322A discloses a temporary plugging agent for reservoir drilling fluid, which is characterized in that it comprises the following raw materials in parts by weight: 60-

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A reservoir drilling fluid system, comprising the following components by weight: nanocrystalline cellulose 3%, calcium formate 1%, polyamine inhibitor 2%, lauryl ricinoleate 2%, graphite 1%, nitrate 1% Sodium humate 2%, polymer fluid loss reducer 1%, sodium perfluorononenyloxybenzene sulfonate 4%, dodecyltrimethylammonium chloride 2%, alkyl glycoside 2%, 2% barite powder, 1% triethanolamine, and the balance of deionized water.

[0027] The nanocrystalline cellulose is prepared by a method comprising the following steps: using a high-speed pulverizer to crush castor rods to obtain solid particles with a particle size of 3-5 mm, adding an inorganic strong acid solution to the solid particles and stirring at constant temperature for 3.5 hours , filter to obtain crude cellulose; add deionized water with 15 times the mass of the solid particles into the crude cellulose, stir evenly, and perform ultrasonic treatment on the obtained mixture for 1 h, stand and dry to obtain th...

Embodiment 2

[0035] A reservoir drilling fluid system, comprising the following components by weight: nanocrystalline cellulose 4%, calcium formate 2%, polyamine inhibitor 6%, lauryl ricinoleate 3%, graphite 2%, nitrate Sodium humate 3%, polymer fluid loss reducer 2%, sodium perfluorononenyloxybenzene sulfonate 5%, dodecyl trimethyl ammonium chloride 3%, alkyl glycoside 3%, 2% barite powder, 1.5% triethanolamine, and the balance of deionized water.

[0036]The nanocrystalline cellulose is prepared by a method comprising the following steps: using a high-speed pulverizer to crush castor rods to obtain solid particles with a particle size of 3-5 mm, adding an inorganic strong acid solution to the solid particles and stirring at constant temperature for 3.5 hours , filter to obtain crude cellulose; add deionized water with 15 times the mass of the solid particles into the crude cellulose, stir evenly, and perform ultrasonic treatment on the obtained mixture for 1 h, stand and dry to obtain th...

Embodiment 3

[0044] A reservoir drilling fluid system, comprising the following components by weight: 5% of nanocrystalline cellulose, 2% of calcium formate, 8% of polyamine inhibitor, 4% of lauryl ricinoleate, 3% of graphite, 3% of nitric acid 5% sodium humate, 3% polymer fluid loss reducer, 6% sodium perfluorononenyloxybenzene sulfonate, 5% dodecyl trimethyl ammonium chloride, 5% alkyl glycosides, 3% barite powder, 1.5% triethanolamine, and the balance of deionized water.

[0045] The nanocrystalline cellulose is prepared by a method comprising the following steps: using a high-speed pulverizer to crush castor rods to obtain solid particles with a particle size of 3-5 mm, adding an inorganic strong acid solution to the solid particles and stirring at constant temperature for 3.5 hours , filter to obtain crude cellulose; add deionized water with 15 times the mass of the solid particles into the crude cellulose, stir evenly, and perform ultrasonic treatment on the obtained mixture for 1 h,...

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Abstract

The invention relates to the technical field of oilfield chemical agent preparation, in particular to a reservoir drilling fluid system and a preparation method thereof. Nano microcrystalline cellulose is extracted from natural plant raw materials, a polyamine inhibitor is synthesized from specific raw materials, and the nano microcrystalline cellulose and the polyamine inhibitor are scientifically compounded with calcium formate, a lubricant, a surfactant, a filtrate reducer and other components, so that the obtained drilling fluid system has excellent rheology, filtrate reduction, temporary plugging removal, lubrication and other properties, and the system is low in biotoxicity and good in environmental protection performance; and the preparation method is simple, convenient and feasible, and can realize large-scale production

Description

technical field [0001] The invention relates to the technical field of oilfield chemical agent preparation, in particular to a reservoir drilling fluid system and a preparation method thereof. Background technique [0002] At present, drilling fluid is a chemical preparation that must be used in oilfield development, and is an important guarantee measure to ensure the safety, quality, efficiency and speed of drilling production operations. During the drilling process, the working fluid invades the reservoir. Due to the sensitivity of the reservoir, the solid phase particles of the drilling fluid and the formation particles migrate, block the pore throat, and cause damage to the reservoir. Therefore, effective reservoir protection is an effective guarantee for achieving higher oil and gas recovery. [0003] CN105295872A discloses a drilling fluid suitable for tight sandstone reservoirs, in terms of mass percentage, the composition of the drilling fluid comprises: 0.5%-2% ben...

Claims

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Application Information

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IPC IPC(8): C09K8/12C09K8/10C09K8/508C09K8/514C08F251/00C08F222/06C08B15/02
CPCC09K8/10C09K8/12C09K8/514C09K8/5083C09K8/5086C08F251/00C08B15/02C09K2208/34C09K2208/12C08F222/06
Inventor 梁飞王兆永孔庆明张新向
Owner 山东维斯特尔石油科技有限公司
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