Dually retarded emulsified self-generated acid and preparation method thereof

A self-generating acid and retarding technology, applied in chemical instruments and methods, earth drilling, mining fluids, etc., can solve the problems of poor temperature resistance, lack of retarding effect, unusable, etc., and achieve high conductivity, good Acidification effect, good retarding performance effect
CN110643344AActive Publication Date: 2020-01-03CHINA PETROLEUM & CHEM CORP +1
6 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2020-01-03

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a dually retarded emulsified self-generated acid and a preparation method thereof. The emulsified self-generated acid comprises the following components in parts by volume: 60-80 parts of self-generated acid and 20-40 parts of an oil phase, wherein the oil phase contains 3-5 parts by weight of an emulsifier based on 100 parts by weight of the total amount of the oil phase.The preparation method comprises the following steps: dropwise adding the oil phase into the self-generated acid according to the usage amount under high-speed stirring of 1000r / min-3000r / min, and carrying out stirring for 10-30min to form a uniform emulsion to prepare the dually retarded emulsified self-generated acid. An emulsion of the emulsified self-generated acid provided by the invention combines advantages of self-generated acids and emulsified acids, has good stability at 200 DEG C, can meet the requirements of acid pressing / acidifying construction of an ultra-high temperature carbonate reservoir, and has a good popularization and application prospect.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of acid fracturing stimulation of carbonate rock reservoirs, and furthermore, relates to a double retarded emulsified authigenic acid and a preparation method thereof. Background technique

[0002] With the deepening of exploration and development of carbonate reservoirs, in order to meet the requirements of deep acidification, the performance requirements of acid system are getting higher and higher, and it is urgent to develop a new type of high temperature resistant slow acid system.

[0003] Autogenous acid, also known as latent acid, refers to the formation of active acid by chemical reaction of the acid matrix under formation conditions. Different autogenous acid systems can produce HCl and HF or a mixture of both. The use of authigenic acid systems in high-temperature formations can not only avoid the rapid deactivation of acid liquids at high temperatures and shorten the effective length of acid-etched fractur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More