application scope
The sustained releasing acidizing technology is mainly applied to remotely acidified wells in sandstone formations, wells with high non-homogeneity, deep contamination of the formation and short expiry dates where multiple acidizing measures have been ineffective, and wells where soil acidizing is not effective. The clay of this acidizing system effectively prevents the swelling and transport of particles after the acidizing reaction, improves the acidizing effect and has a great potential to increase production.
technical characteristics
This acidizing system anti-acid slag agent can prevent the acid slag formed after the reaction between crude oil and acid, and the clay anti-expansion agent can effectively stop the expansion and transportation of particles after the acidizing reaction and improve the acidizing effect.
1、The acidification system precedes the formation of micelles in the acid solution, which can lift the organic matter pollution blockage, while ensuring that the main acid can fully react with organic and inorganic compound scales and completely lift the blockage;
2、It can prevent the secondary precipitation of iron compounds and fluoride and fluorosilicate in the acidification, and improve the acidification effect;
3、The acidification system can maintain low pH value of acid by ionisation, which prolongs the reaction time between acid and blockage, and at the same time, the reaction produces CO2 residue in the acid, which can also inhibit the positive reaction, so as to achieve the purpose of deep acidification;
4, this acidizing system anti-acid slagging agent can prevent the acid slag formed after the reaction between crude oil and acid, and the clay anti-expansion agent can effectively stop the expansion and transportation of particles after the acidizing reaction, so as to improve the acidizing effect.
technical advantage
Our slow release acidizing technology has changed the existing acidizing technology, which has the advantages of long duration of acidizing, good unblocking effect, can prevent secondary precipitation and strong anti-expansion ability. It effectively solves the shortcomings of the existing acidizing technology, which is effective in the near-well zone but ineffective in the far-well zone. In addition, our slow-release acidizing technology is much more friendly to the environment, and the effect of rejection and effect is much better than the existing acidizing technology. The company has promoted and applied the technology to more than 500 wells in major oil fields, with an efficiency rate of over 90% and a cumulative oil increase of 50,000t.
