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Oil well surrounding stratum hyphobic lipophilic treating additive and its preparing method

A technology for oil treatment and crude oil, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of reducing oil well production, reducing crude oil permeability, hindering the flow of crude oil to oil wells, etc., and achieving the removal of water plugging and water cut in oil layers Decrease and increase in oil production

Inactive Publication Date: 2006-11-08
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of drilling, completion, production and stimulation of oil wells, water accumulates near the wellbore of the oil layer, causing water plugging at the bottom, which reduces the permeability of crude oil, that is, hinders the flow of crude oil from the formation to the oil well, and reduces the production of the oil well.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The invention relates to a hydrophobic and lipophilic treatment agent for formations near the wellbore, wherein the cationic surfactants are selected from bis(octadecyl)dimethyl ammonium chloride and cetyl pyridinium chloride, and the organic substances are selected from bitumen. Parts are as follows, all are parts by weight:

[0017] 100 parts of water

[0018] 8 parts of bis(octadecyl)dimethylammonium chloride

[0019] Hexadecyl pyridinium chloride 6 parts

[0020] 80 parts of asphalt.

[0021] Preparation method: Add bis(octadecyl)dimethyl ammonium chloride and cetyl pyridinium chloride to water, heat to 85-90°C and pour into colloid mill, then add hot asphalt at about 140°C, discharge, Pay attention to heat preservation during the preparation process.

[0022] When the hydrophobic and lipophilic treatment agent of this embodiment is used, the operation site can be diluted with 1-6% OP-10 to the solid content of 1-5% solution injected into the formation. well. ...

Embodiment 2

[0024] A hydrophobic and lipophilic treatment agent for oil well near wellbore formations, in which bis(octadecyl)dimethyl ammonium chloride and cetyl pyridinium chloride are selected as cationic surfactants, and hydroxyl silicone oil is selected as organic substance, specifically Components are as follows, all in parts by weight:

[0025] 100 parts of water

[0026] 5 parts of bis(octadecyl)dimethylammonium chloride

[0027] Cetyl pyridinium chloride 5 parts

[0028] 60 parts of hydroxyl silicone oil.

[0029] Preparation method: Add water, bis(octadecyl)dimethyl ammonium chloride and cetyl pyridinium chloride in sequence to a high-speed stirring tank, then add hydroxyl silicone oil, stir for 20 minutes, and discharge.

[0030] In this embodiment, the water-repellent and lipophilic treatment agent can be diluted with 1-6% OP-10 to solid content of 1-5% and injected into the stratum at the working site.

Embodiment 3

[0032] A water-repellent and lipophilic treatment agent for formation near the wellbore, wherein the cationic surfactants are cetyl dimethyl phenyl ammonium chloride and octadecyl pyridinium chloride, and the organic substances are paraffin wax. The specific components As follows, all are parts by weight:

[0033] 100 parts of water

[0034] Hexadecyl dimethyl phenyl ammonium chloride 6 parts

[0035] Octadecyl pyridinium chloride 9 parts

[0036] 90 parts of paraffin.

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PUM

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Abstract

The hydrophobic and lipophilic treating additive and its preparation process belong to the field of petrochemical technology. The hydrophobic and lipophilic treating additive consists of water 100 weight portions, cationic surfactant 1-20 weight portions and organic matter 1-120 weight portions. It is prepared through adding cationic surfactant into water, heating to 85-90 deg.c, filling to colloid mill, adding organic matter at 120-140 deg.c and discharging. The hydrophobic and lipophilic treating additive is injected into oil well and can adhere firmly to core so as to convert the stratum surface near the oil well from hydrophilic one to hydrophobic and lipophilic one and maintain for over two months.

Description

technical field [0001] The invention relates to a water-repellent and lipophilic treatment agent for oil well near-well formations and a preparation method thereof, belonging to the technical field of petrochemical industry. Background technique [0002] In the process of drilling, completion, production and stimulation of oil wells, water accumulates in the near-well zone of the oil layer, causing water plugging at the bottom, which reduces the permeability of crude oil, that is, hinders the flow of crude oil from the formation to the oil well, and reduces the production of the oil well . Therefore, increasing the oil production rate of oil wells, reducing water cut, and removing water plugging have a lot to do with removing water near the wellbore, and crude oil reservoirs are usually hydrophilic, that is, the cores that make up the reservoir are hydrophilic , or water-wet, and during the various operations of the oil well, the water in the well-killing fluid seeps into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
Inventor 汤志强刘伟良
Owner SOUTHWEST PETROLEUM UNIV
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