Non-permeable reservoir protectant for drilling fluid ZD-Ⅰ（EPMC）
2024-06-19 10:00Non-permeable reservoir protectant for drilling fluid ZD-Ⅰ（EPMC）
Product Description：
This product is made by adding compound film forming agent into the formula, forming film on the well wall and forming extremely thin mud cake.Add "acid-soluble material" to make the product partiNon-permeable reservoir protectant for drilling fluidally acid-soluble;Adding "cationic surfactant", filtrate can prevent formation clay from swelling;The addition of nano-scale fiber and other complex has a certain plugging effect.Compared with similar oil and gas reservoir protectants at home and abroad, it has the obvious characteristics of little influence on the rheological properties of drilling fluid and is convenient for on-site construction.Minimal penetration of drilling fluid filtrate into the formation (sand penetration depth is only 2 ~ 5cm);
Scope of Application:
Can acidify dissolves (actually acid dissolves rate to amount to 70% above), facilitate acid defusing block.The important function of the product to add drilling fluid is to protect the oil and gas layer and reduce the damage of drilling fluid to the oil and gas layer.At the same time, the product also has the function of preventing leakage of permeability.It is suitable for the well segment which is about to enter oil and gas layer and the permeability leakage well segment.The product should be added before entering the oil and gas layer.Generally, 1% to 2% of the additive can be relaxed to 1% to 3% if there is permeability leakage.
Products Specification：
Project | Index |
Sieve residue mass fraction，% ≤ | 20.0 |
Viscosity rise value，mPa·s ≤ | 10 |
| Depth of filtrate immersed in sand bed，cm ≤ | 6 |
Type A acid solubility，% | 40 |
| Type B acid solubility，% ≥ | 70 |
Reverse plugging pressure relief,mPa.s ≤ | 5 |
Usage and dosage：
The product should be added before entering the oil and gas layer.Generally, 1% to 2% of the additive can be relaxed to 1% to 3% if there is permeability leakage.The addition method is also relatively simple, only need to add directly in the mixing leakage can be used, the use of the product mud vibration screen cloth using 80 mesh.
