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Water block removing agent as well as preparation method and application thereof

A technology for dehydration-blocking agents and active agents, which is applied in the direction of chemical instruments and methods, and drilling compositions, etc. It can solve the problems of time-consuming and complicated preparation and use process, difficult degradation of dehydration-blocking agents, single application scenarios, etc., and achieves easy mass production , increase the relative permeability of the oil phase, and the effect of simple preparation method

Pending Publication Date: 2021-09-24
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems in the prior art, such as difficult degradation of water-blocking agents, poor temperature and salt resistance, single application scenarios, time-consuming and complicated preparation and use process, etc.

Method used

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  • Water block removing agent as well as preparation method and application thereof
  • Water block removing agent as well as preparation method and application thereof
  • Water block removing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098]Add a certain amount of tap water into the beaker, add sodium dodecylsulfonate and sodium α-olefin sulfonate into the water, wherein the mass ratio of sodium dodecylsulfonate and sodium α-olefin sulfonate is 1:2, and stir well , stirring speed 200rpm / min, stirring 5min; Then add methanol and polyethylene glycol (average molecular weight is 400), wherein methanol and polyethylene glycol mass ratio is 1:1, stir well, stirring speed 200rpm / min, stir 5min ; Add dodecyltrimethylammonium bromide, stir well, stirring speed 200rpm / min, stir 5min; add fatty alcohol polyoxyethylene ether sodium carboxylate, stir well, stirring speed 500rpm / min, stir 10min; add nano The active agent material is stirred evenly at a stirring speed of 200rpm / min, and stirred for 10 minutes to obtain a hydrolytic locking agent. In the prepared hydrolytic locking agent, the total mass fraction of sodium dodecylsulfonate and sodium α-olefin sulfonate is 10%. , the total massfraction of methyl alcohol and...

Embodiment 2

[0100] Add a certain amount of tap water into the beaker, add sodium dodecylsulfonate and sodium α-olefin sulfonate into the water, wherein the mass ratio of sodium dodecylsulfonate and sodium α-olefin sulfonate is 1:2, and stir well , stirring speed 400rpm / min, stirring 5min; Then add methanol and polyethylene glycol (average molecular weight is 600), wherein methanol and polyethylene glycol 600 mass ratio is 1:1, stir well, stirring speed 400rpm / min, stir 5min; add dodecyltrimethylammonium bromide, stir well, stirring speed 400rpm / min, stir 5min; add fatty alcohol polyoxyethylene ether sodium carboxylate, stir well, stirring speed 500rpm / min, stir 10min; add Nano-active agent material, stirring evenly, stirring speed 400rpm / min, stirring 10min, obtains the dehydration-locking agent, and in the prepared dehydration-locking agent, the total mass fraction of sodium dodecyl sulfonate and sodium α-olefin sulfonate is 15 %, the total mass fraction of methanol and polyethylene glyc...

Embodiment 3

[0102] Add a certain amount of tap water into the beaker, add sodium dodecylsulfonate and sodium α-olefin sulfonate into the water, wherein the mass ratio of sodium dodecylsulfonate and sodium α-olefin sulfonate is 1:2, and stir well , stirring speed 600rpm / min, stirring 5min; Then add ethanol and polyethylene glycol (average molecular weight is 800), wherein methanol and polyethylene glycol 800 mass ratio are 1:1, stir well, stirring speed 600rpm / min, stirring 5min; add dodecyltrimethylammonium bromide, stir evenly, stirring speed 600rpm / min, stir 5min; add alkylphenol polyoxyethylene ether carboxylate sodium, stir well, stirring speed 800rpm / min, stir 10min; Add nano-active agent material, stir evenly, stirring speed 600rpm / min, stir for 10min, obtain the dehydration-locking agent, in the prepared dehydration-locking agent, the total mass fraction of sodium dodecylsulfonate and sodium α-olefin sulfonate is 20%, the total massfraction of ethanol and polyethylene glycol 800 is...

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Abstract

The invention discloses a water block removing agent. The water block removing agent is prepared from a nano active agent material, an anionic surfactant, an anionic-nonionic surfactant, a cationic surfactant, a solubilizer and water, the nano active agent material is obtained by polymerizing raw materials containing a double-bond modified lamellar nano material, a hydrophilic monomer and a hydrophobic monomer; the hydrophilic monomer is selected from at least one of anhydride compounds; and the hydrophobic monomer is selected from at least one of long-chain alkyl allyl quaternary ammonium salts. The water lock removing agent is low in surface tension and interfacial tension, high in interfacial activity, good in high temperature resistance and salt resistance, small in usage amount, free of fluorocarbon refractory components, simple in preparation method, low in cost and convenient to use.

Description

technical field [0001] The application relates to a water-blocking agent and its preparation method and application, belonging to the technical field of low-permeability oil and gas reservoir development. Background technique [0002] In the process of oil and gas field development, after foreign fluids such as drilling fluid, completion fluid and fracturing fluid enter the reservoir, due to the retention of capillary, the formation pressure cannot completely discharge the retained fluid from the formation, resulting in an increase in the water saturation of the reservoir. Phase permeability decreases, a phenomenon known as water lock damage. Low-permeability oil and gas reservoirs account for about 30% of my country's total oil and gas resources. These oil and gas reservoirs have the characteristics of high capillary pressure, small pores, and complex structures, and there are generally serious water lock damages. In order to better develop and utilize low-permeability oil...

Claims

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Application Information

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IPC IPC(8): C09K8/588C09K8/584C09K8/60C08F222/06C08F226/02
CPCC09K8/588C09K8/584C09K8/604C08F222/06C09K2208/10C08F226/02
Inventor 马健波吴文炜赵聪孙静波田玉芹
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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