Methanesulfonic acid-ammonium hydrogen fluoride acid liquid system and preparation method and application thereof

A technology of ammonium bifluoride and methanesulfonic acid, applied in chemical instruments and methods, production fluids, earth-moving drilling, etc., can solve the problems of wellbore corrosion, reservoir damage and pollution, etc., to slow down oil pipe corrosion and achieve good scale inhibition. , good anti-scaling effect

Inactive Publication Date: 2016-09-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of the existing technology that the damage to the reservoir is relatively large and the wellbore is very corroded at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a kind of methanesulfonic acid-ammonium bifluoride acid liquid system, by weight of each substance in every 100g solution, methanesulfonic acid 1g-95.6g, ammonium bifluoride 0.6g-3g; Organic acid 0.6g- 3g, iron ion stabilizer 0.15g-0.2g, acidification drainage aid 0.5g; foaming agent 0.5g; clay stabilizer 0.5g; acidification corrosion inhibitor 1.5g-2g; composite scale inhibitor 0.05g- 0.1 g, water 0-94g.

[0031] Principle of the present invention:

[0032] Methanesulfonic acid-ammonium bifluoride is used as the main reaction agent of the system, and the reaction generates acid, which is used for acidizing deep formations; organic acid is used as a solvent; the role of iron ion stabilizer: to prevent the precipitation of iron gel; Chemicals used in acidizing, fracturing and other operations where working residues flow back from formations; foaming agents are mainly used to reduce interfacial tension at the air-water interface; clay stabilizers...

Embodiment 2

[0035] On the basis of Example 1, this example provides a method for preparing a methanesulfonic acid-ammonium hydrogen fluoride acid liquid system, adding 92.04 g of solvent water into the beaker, putting the rotor into it and placing the beaker on a magnetic stirrer, Add 1.2 g of acetic acid and 2 g of methanesulfonic acid in sequence, and stir at 200 r / min for 5 minutes; keep stirring at 200 r / min, add 2 g of corrosion inhibitor for acidification, 0.5 g of drainage aid for acidification, and clay stabilizer into the solution 0.5g, 0.2g citric acid, 0.5g foaming agent, 0.07g composite scale inhibitor; finally add 1.2g ammonium bifluoride to prepare methanesulfonic acid-ammonium bifluoride acid solution system.

[0036] In this embodiment, the organic acid is acetic acid, the iron ion stabilizer is citric acid, and the drainage aid for acidification is YC-ZP-01 drainage aid produced by Shaanxi Yanchang Petroleum Fine Chemical Technology Co., Ltd., and the implementation standa...

Embodiment 3

[0039] Add 43.4g of solvent water into the beaker, put in the rotor and place the beaker on a magnetic stirrer, add 2.4g of acetic acid and 48g of methanesulfonic acid in turn, stir at 200r / min for 5min; keep stirring at 200r / min, in the solution Add 2 g of corrosion inhibitor for acidification, 0.5 g of drainage aid for acidification, 0.5 g of clay stabilizer, 0.15 g of citric acid, 0.5 g of foaming agent, and 0.1 g of composite scale inhibitor; finally add 2.4 g of ammonium bifluoride to prepare Methanesulfonic acid-ammonium bifluoride acid solution system.

[0040] In this embodiment, the organic acid is acetic acid, the iron ion stabilizer is citric acid, and the drainage aid for acidification is YC-ZP-01 drainage aid produced by Shaanxi Yanchang Petroleum Fine Chemical Technology Co., Ltd., and the implementation standard is Q / YC 0001- 2013; the foaming agent model is GMH-1, purchased from Dongying Guangmao Petroleum Technology Service Co., Ltd.; the corrosion inhibitor f...

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Abstract

The invention provides a methanesulfonic acid-ammonium hydrogen fluoride acid liquid system. The acid liquid system is prepared from components, by weight of 100 g of the solution, as follows: 1-95.6 g of methanesulfonic acid, 0.6-3 g of ammonium hydrogen fluoride, 0.6-3 g of organic acid, 0.15-0.2 g of a ferrous stabilizer, 0.5 g of a discharge aiding agent for acidification, 0.5 g of a foaming agent, 0.5 g of a clay stabilizer, 1.5-2 g of a corrosion inhibitor for acidification, 0.05-0.1 g of a composite scale inhibitor and the balance of solvent water. The provided methanesulfonic acid-ammonium hydrogen fluoride acid liquid system has good corrosion capability, has a certain retardance effect, a deep acidification function on a reservoir and a protection function on an underground tubular column and also has a good anti-scaling function.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a methanesulfonic acid-ammonium hydrogen fluoride acid liquid system and a preparation method and application thereof. Background technique [0002] With the continuous deepening of exploration and development, acid fracturing technology restores and improves the permeability of formations through the dissolution of acid, and improves the productivity of oil and gas wells. With the in-depth development of oil and gas reservoirs, acidizing technology has become a breakthrough in understanding reservoirs and exploration and development. An essential means, increasing the length and conductivity of acid-etched fractures is the only way to improve the effect of acid fracturing. [0003] The performance of the acid fluid plays a key role in the effect of acidizing fracturing. In order to obtain a better acidizing effect, the acid fluid has the following requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74E21B43/27
CPCC09K8/74C09K2208/12C09K2208/32E21B43/26
Inventor 吕小明李建山慕立俊李宪文陆红军吕海燕杨立安常笃何衡康博李建辉古正富冯飞
Owner PETROCHINA CO LTD
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