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Cationic wax compound profile adjusting and water plugging agent and preparation method thereof and profile adjusting and water plugging process

A technology of profile control water shutoff agent and cationic wax, which is applied in chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of anti-scourability, poor shear resistance, low strength, etc. Achieve the effect of improving plugging effect and oil displacement efficiency, good salt resistance and strong suspension

Inactive Publication Date: 2014-07-23
DAQING ZHONGYOU TAIKE PETROLEUM TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cationic petroleum wax composite profile control water shutoff agent for the above problems. Problems, to meet the requirements of profile control and water shutoff in deep wells with different formation temperatures, low permeability and other reservoirs, to meet the needs of oilfield production; at the same time, provide a chemical profile control and water shutoff technology to further tap the remaining oil potential and reduce the water cut ratio of oil wells , improve oil recovery, increase utilization of injected water, and improve water injection displacement effect

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The component content is calculated by weight percentage: cationic wax 65%, bentonite 35%.

[0020] The preparation method of the cationic wax composite profile control and water shutoff agent comprises the following steps:

[0021] 1. Add the cationic wax to the enamel reaction kettle according to the routine, and slowly raise the temperature to 80°C;

[0022] 2. After the cationic wax melts under constant stirring, add bentonite and continue stirring until uniform;

[0023] 3. Stop heating and heat preservation, discharge to the storage tank, and cool to room temperature;

[0024] 4. Then crush and grind to the required particle size 1*10 3 ~4*10 3 μm, the finished product is the cationic wax composite profile control and water shutoff agent of the present invention.

[0025] The experiment was arranged in Fuyu Oilfield: in the Z5-9 area of ​​Fuyu Oilfield, cationic wax was used to compound profile control and water shutoff agent. During the field test of profile...

Embodiment 2

[0027] The component content is calculated by weight percentage: cationic petroleum wax 90%, bentonite 10%.

[0028] The preparation method of the cationic wax composite profile control and water shutoff agent comprises the following steps:

[0029] 1. Add cationic petroleum wax to the enamel reaction kettle according to the routine, and slowly raise the temperature to 80°C;

[0030] 2. After the cationic petroleum wax melts under constant stirring, add bentonite and continue stirring until uniform;

[0031] 3. Stop heating and heat preservation, discharge to the storage tank, and cool to room temperature;

[0032] 4. Then crush and grind to the required particle size 1*10 3 ~4*10 3 μm, the finished product is the cationic petroleum wax composite profile control and water shutoff agent of the present invention.

[0033] In November 2011, the No. 6 Oil Production Plant of Daqing carried out a field test in the water flooding 8-1627 well area of ​​the North Block of Lamadian...

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Abstract

The invention discloses a cationic wax compound profile adjusting and water plugging agent and a preparation method thereof and a profile adjusting and water plugging process. The water plugging agent comprises the following components in percentage by weight: 50-90% of cationic wax and 10-50% of bentonite, wherein the cationic wax is petroleum wax, and different marks are selected to be processed according to stratum temperature and melting point of paraffin, and the bentonite is sodium bentonite and calcium bentonite. When oil and water wells are profile-adjusted and water-plugged, profile adjusting and water plugging agents with different concentrations and grain sizes designed according to the stratum demands in advance are continuously injected through an injection pump sequentially in a sectional plug according to the actual condition of the stratum and different target stratums at which profile adjusting and water plugging measures are implemented. After injection, clean water is used to replace, thus, the field construction is fully finished. The well is closed for waiting on cement setting and is opened to produce. The agent disclosed by the invention solves the problems that in the profile adjusting and water plugging process of the oil and water wells, conventional chemical plugging agents are dropped out, high concentration chemical plugging agents are hard to inject and a high temperature oil layer gel plugging agent fails, and particularly a ternary compound displacing fluid which is high in pH value affects gelatinization of the chemical plugging agent and the like.

Description

technical field [0001] The invention relates to oil exploitation in an oil field, in particular to a cationic wax composite profile control and water shutoff agent, a preparation method and a profile control and water shutoff process. Background technique [0002] With the development of oilfield water injection, due to the difference in permeability of each oil layer, the injected water will rush along the high permeability layer, especially the low permeability oil layer is repeatedly artificially fractured, resulting in serious water flooding of each sedimentary unit of the oil layer, and the plane, interlayer, The production difference in the layer is relatively prominent, some wells have low efficiency and serious invalid circulation, and the water cut of oil wells rises rapidly, resulting in premature water flooding of oil wells. Water production from oil wells is a common problem. Due to the water flooding large pores and fractured oil layers formed by water injection...

Claims

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Application Information

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IPC IPC(8): C09K8/502E21B43/22
CPCC09K8/502E21B33/13
Inventor 邹积鹏刘丹峰
Owner DAQING ZHONGYOU TAIKE PETROLEUM TECH SERVICE
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