Efficient retarded acidification working fluid and preparation method thereof
A working fluid and retarding technology, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of weak corrosion, achieve easy flowback, improve core permeability performance, prolong acid The effect of rock reaction time
Inactive Publication Date: 2021-06-29
CHINA NAT OFFSHORE OIL CORP +1
3 Cites 0 Cited by
AI-Extracted Technical Summary
Problems solved by technology
View more
Method used
View more
Abstract
The invention discloses an efficient retarded acidification working fluid and a preparation method thereof. Every 100 parts of the efficient retarded acidification working fluid comprises the following components in parts by mass: 10-20 parts of ammonium salt, 5-20 parts of organic phosphonic acid, 5-20 parts of hydrochloric acid, 1-6 parts of a corrosion inhibitor, 0.5-2 parts of a clay stabilizer and 0.5-2 parts of an iron ion stabilizer, with the balance being water. The preparation method of the efficient retarded acidification working fluid comprises the following steps: adding the water into the ammonium salt at normal temperature and normal pressure, and carrying out stirring and dissolving to obtain an ammonium salt solution; adding the hydrochloric acid and the organic phosphonic acid into the ammonium salt solution, and carrying out uniform stirring and mixing to obtain a retarded acid solution; and sequentially adding the corrosion inhibitor, the clay stabilizer and the iron ion stabilizer into the retarded acid solution, and carrying out uniform stirring and mixing to obtain a finished product. The efficient retarded acidification working fluid has a good corrosion effect on stratum rocks and can improve the permeability of rock cores; and the efficient retarded acidification working fluid has good slow-release property, can act on stratum rocks for a longer time, realizes deep plug removal, and is beneficial to yield increase of petroleum and natural gas reservoirs.
Application Domain
Drilling compositionBorehole/well accessories
Technology Topic
Environmental geologyCorrosion inhibitor +7
Image
Examples
- Experimental program(5)
Example Embodiment
Example Embodiment
Example Embodiment
PUM


Description & Claims & Application Information
We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
Similar technology patents
Boron-gallium codoped quasi-monocrystalline silicon and preparation method thereof
Owner:东海晶澳太阳能科技有限公司 +1
Quaternary ammonium salt type surfactant fracturing fluid
Owner:PETROCHINA CO LTD
Normal-temperature processed cheese and preparation method thereof
Owner:上海光明奶酪黄油有限公司
Medical adhesives and preparation method thereof
Owner:莫秀梅 +1
Methanol gasoline and its preparation method
Owner:永州锦溁新能源开发有限公司
Classification and recommendation of technical efficacy words
- Easy to prepare
- Raw materials are easy to get
Method for removing pollutants in sewage
Owner:JIANGSU LV CHUAN ENVIRONMENTAL PROTECTION TECH
Carbon nanofiber aerogel as well as preparation method and application thereof
Owner:UNIV OF SCI & TECH OF CHINA