Drilling with high water loss acid solution plugging agent R-19 (EPMC)
2024-06-15 10:00Drilling with high water loss acid solution plugging agent R-19 (EPMC)
Product Description:
The leak slurry, the product makes up into the formation filtration channels, under the action of pressure difference, rapid water loss (fastest in a few seconds), which soon has certain initial strength of filter cake and plugging layer, the initial pressure of 4 mpa s. above, in the gentle, under the action of pressure difference ohigh water loss acid solution plugging agentf filter cake gradually solidified, the confined ability improved, 24 hours of 20 mpa is even higher.The acid solubility of the product is more than 70%, which is conducive to protecting the production layer and recovering after plugging.In the process of plugging in the case of large filtration loss can also be mixed with bridge plug plugging material, such as walnut shell plugging, the effect is very significant.
Scope of application:
1. Suitable for plugging medium to large leakage in the drilling process;
2. High pressure after plugging;
3. Convenient preparation and simple use;
4. The slurry made up of the plugging agent can be aggravated, which is suitable for plugging under various density mud conditions;
5. For crushing leakage, in addition to plugging the leakage, there is a sealing effect.
（The performance index is satisfied with HHH highly effective acid soluble plugging agent, and conforms to the technical standard requirements of petrochina and sinopec.）
Technical Specification:
Project | Index |
Appearance | A mixture of powdered fibers of milky white or light gray |
Water content，% | ≤15 |
Stability, % | ≥80 |
Filtration time, s | ≤60 |
The acid solubility, % | ≥70 |
Loss of slurry before plugging，ml | All the loss |
Loss of slurry after plugging，ml | ≤40 |
Usage and dosage:
1、For permeability, micro-fracture, porosity well leakage, V leakage is no more than 3-5m3/h, can be used as drilling plugging agent, add 2-3%, directly into a variety of mud can be.
2. For small fracture porosity well leakage, 3-5 m3/h is less than or equal to 30m3/h for V leakage less than or equal to 30m3/h. The plugging slurry can be prepared according to the formula: water +15-30% R-19 for plugging.
3. For the well leakage with large fractures (above 3mm), the leakage of 30m3 /h is less than or equal to V and less than or equal to 60m3/h. The plugging slurry prepared by water +25-40% R-19 +2-4% walnut shell +1-3% mica can be used to plug the leakage.
4. For large fracture and karst cave well leakage, V leakage is greater than or equal to 60m3/h or loss of return, which can be integrated with cement.
