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A kind of high temperature clay anti-swelling agent and its preparation method and application

The technology of anti-swelling agent and clay is applied in the field of high-temperature clay anti-swelling agent and its preparation. , the effect of anti-swelling and production increase, and the effect of improving the production of a single well

Active Publication Date: 2017-01-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the steam injection additives commonly used in the field include potassium chloride, quaternary ammonium salt, and hydroxyaluminum. The temperature resistance of the three additives cannot meet the requirements, and the anti-swelling effect is not ideal.
At the same time, the anti-swelling agent for high-temperature clay only prevents the problem of non-swelling of clay at high temperature, and it is difficult to meet the needs of protecting oil and gas formations in the process of thermal recovery of heavy oil

Method used

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  • A kind of high temperature clay anti-swelling agent and its preparation method and application
  • A kind of high temperature clay anti-swelling agent and its preparation method and application
  • A kind of high temperature clay anti-swelling agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 (higher shale content ≤ 5%, reservoir temperature ≤ 85°C):

[0048] Synthesize the embodiment of the high-temperature clay anti-swelling agent that can prepare 13.3 square meters of 15% (volume) aqueous solution:

[0049] About the quality ratio of medicines:

[0050] Sodium tetrahydroxyaluminate: tetrabutyl sodium fluoride: sulfamic acid: palmitic acid: octadecanoic acid=3:2.5:2.5:1:1;

[0051] Quantitatively prepare each reagent according to the ratio of the medicine; check whether the reaction kettle (2 squares) and the medicine mixing pool (20 squares) are in working condition, and whether the water for dosing is smooth;

[0052] (1) Preparation of agent A: Add 600kg sodium tetrahydroxyaluminate and 500kg tetrabutyl sodium fluoride quantitatively into the first reaction kettle, stir evenly at room temperature (45 rpm) for 30 minutes, and put the reaction kettle Raise the temperature to 105°C, mix for 15 minutes with uniform stirring, then cool to room te...

Embodiment 2

[0060] Example 2 (the shale content is 5-10% higher, and the reservoir temperature is 85-120°C):

[0061] Synthesis of high-temperature clay anti-swelling agent that can be prepared with 16 square meters of 12.5% ​​(volume) aqueous solution:

[0062] About the quality ratio of medicines:

[0063] Sodium tetrahydroxyaluminate: tetrabutyl sodium fluoride: sulfamic acid: palmitic acid: octadecanoic acid=3.5:3:1.5:1.25:0.75;

[0064] Quantitatively prepare each reagent according to the ratio of the medicine; check whether the reaction kettle (2 squares) and the medicine mixing pool (15 squares) are in working condition, and whether the water for dosing is smooth;

[0065] (1) Preparation of agent A: Add 700kg of sodium tetrahydroxyaluminate and 600kg of tetrabutylsodium fluoride quantitatively into the first reaction kettle, stir evenly at room temperature (45 rpm) for 20 minutes, and put the reaction kettle Raise the temperature to 105°C, mix for 35 minutes with uniform stirrin...

Embodiment 3

[0072] Example 3 (higher shale content ≥ 10%, reservoir temperature ≥ 120°C):

[0073] Synthesis can prepare 17 cubic meters of 10% (volume) high-temperature clay anti-swelling agent embodiment of aqueous solution:

[0074] About the quality ratio of medicines:

[0075] Sodium tetrahydroxyaluminate: tetrabutyl sodium fluoride: sulfamic acid: palmitic acid: octadecanoic acid=4:3:1:1.5:0.5;

[0076] Quantitatively prepare each reagent according to the ratio of the medicine; check whether the reaction kettle (2 squares) and the medicine mixing pool (15 squares) are in working condition, and whether the water for dosing is smooth;

[0077] (1) Preparation of drug A: Add 800kg of sodium tetrahydroxyaluminate and 600kg of tetrabutylsodium fluoride quantitatively into the first reaction kettle, stir evenly at room temperature (45 rpm) for 20 minutes, and put the reaction kettle Raise the temperature to 105°C, mix for 35 minutes with uniform stirring, then cool to room temperature, ...

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Abstract

The invention relates to a high temperature clay anti-swelling agent as well as preparation method and application thereof. The high temperature clay anti-swelling agent is prepared from the following components in parts by weight: 3.0-4.0 parts of tetrahydroxy sodium aluminate, 2.5-3 parts of Tetrabutyl sodium fluoride, 1-2.5 parts of sulfamic acid, 1.0-1.5 parts of palmitic acid and 0.5-1.0 part of octadecanoic acid. The high temperature clay anti-swelling agent is mainly applied to relieving oil layer clay high temperature injury and improving well yield in the thickened oil thermal recovery process at Liaohe oilfield; in particular, the high temperature clay anti-swelling agent has more obvious effect in relieving oil layer blocking in steam huff and puff process per turn and improving the steam huff and puff recovery.

Description

technical field [0001] The invention relates to the petroleum field, in particular to a high-temperature clay anti-swelling agent and its preparation method and application. Background technique [0002] The production of heavy oil in Liaohe Oilfield accounts for more than 70% of the total production. At present, the main methods of heavy oil production in Liaohe Oilfield are steam huff and puff, steam flooding and SAGD (Steam Assisted Gravity Drainage). In the late stage, with high water cut and high recovery degree, the oil layer expands at high temperature with clay ore, the oil layer is seriously damaged, and the production capacity of the oil well decreases, which makes the effect of steam huff and puff worse. Nearly 26% of the oil wells (6560 heavy oil wells in the whole oilfield) Lose the economical mining value of continuing to take steam huffs and puffs. In order to inhibit clay swelling and migration damage at high temperature in oil reservoirs, steam injection ad...

Claims

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Application Information

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IPC IPC(8): C09K8/592E21B43/24
CPCC09K8/592C09K2208/12E21B43/24
Inventor 张玉涛张洪君袁鹏朱富林吕俊刘利王浩龙华何川王德伟杨晓莉韩松黄媛媛
Owner PETROCHINA CO LTD