The MicroDRIL high-temperature, high-density water-based drilling fluid technology is an advanced system developed for deep, ultra-deep, special, and complex wells operating under high-temperature and high-pressure conditions. By optimizing the formulation and performance of the drilling fluid, MicroDRIL can maintain excellent rheological properties at temperatures up to 220°C and densities exceeding 2.0 g/cm³.

Features

1. Excellent Rheology: At a density of 2.0 g/cm³, the system exhibits outstanding fluidity with a plastic viscosity of less than 50 mPa·s and a yield point in the range of  5-10 Pa, ensuring smooth circulation in complex geological conditions.

2. Strong Thermal Stability: The drilling fluid system successfully passes rigorous testing, such as a 16-hour hot rolling aging test at 220°C without thickening, maintaining stable viscosity and shear properties for safe and stable operations in      high-temperature environments.

3. Superior Sealing Performance: Designed with carefully crafted plugging agents, MicroDRIL can form effective sealing layers within formation pores, reducing pressure      transmission and enhancing wellbore stability.

4. Excellent Contamination Resistance: Possesses strong resistance to salt, calcium contamination, and shale pollution, maintaining drilling fluid performance stability in complex formations.

5. Outstanding Lubrication Performance: Under high-density conditions, it has an extreme pressure friction coefficient of less than 0.1, significantly reducing friction resistance during drilling, increasing mechanical penetration      rates, and prolonging drill bit life.

6. Enhanced Environmental Performance: Utilizing non-sulfonated preparation processes for key materials, it significantly reduces potential environmental impact, aligning with modern green exploration and development principles.

Advantages

1. Enhanced Drilling Safety: Maintains stable performance in environments with temperatures up to 220°C or higher, preventing performance degradation or failure due to heat,      thereby enhancing operational safety.

2. Increased Drilling Efficiency: Significantly reduces friction between the drill bit and formation, decreasing wear and increasing penetration rates.

3. Cost Reduction: Prolongs drill bit life, reducing frequent replacement costs due to wear.

4. Improved Wellbore Stability: In high-temperature and high-pressure settings, MicroDRIL effectively seals formation pores, minimizing fluid exchange and pressure transmission,      stabilizing the wellbore, and preventing incidents like blowouts.

5. Environmentally Friendly: The use of non-sulfonated key materials offers a significant improvement in environmental performance over traditional sulfonated materials.

Applications

1. High-Temperature Drilling: Suitable for wells where bottom hole temperatures exceed the limits of traditional drilling fluids (e.g., above 200°C), ensuring safe operation.

2. High-Density Drilling: Meets the need for high-density drilling fluids to balance formation pressures and prevent blowouts, providing systems with densities over 2.0 g/cm³ while maintaining fluidity and stability.

3. Complex Formation Drilling: Adequate for high-salinity, calcium-bearing, and shale formations, where drilling fluids demand superior anti-contamination, sealing, and      lubrication properties to meet challenges.

4. Deep and Ultra-Deep Drilling: As drilling progressively reaches greater depths, MicroDRIL's high thermal stability and density make it ideal for deep and ultra-deep well      operations.

5. Environmentally Sensitive Drilling Projects: MicroDRIL technology, prepared using non-sulfonated processes, offers enhanced environmental performance, meeting the requirements of environmentally strict drilling projects.

In summary, MicroDRIL high-temperature, high-density water-based drilling fluid technology is suitable for high-temperature, high-density, complex formation, deep, and ultra-deep drilling operations. Its superior performance and broad applicability make it a critical component in modern drilling technology.

Complementary System Additives

• MicroG High-Temperature Stabilizer: A polymer-based stabilizer specifically designed for high-temperature, high-density water-based drilling fluids. It employs advanced emulsion polymerization technology for ease of application and superior performance enhancement.

• HUMSEAL Plugging Agent

• THERMOFLO High-Temperature  Filtrate Reducer

Key Additive: MicroG High-Temperature Stabilizer

MicroG is a high-temperature stabilizer specifically tailored for high-temperature, high-density water-based drilling fluids. Using advanced emulsion polymerization, it offers multi-faceted performance improvements that enhance operational efficiency and safety.

Functions:

1. Rheological Adjustment: Optimizes fluid flow to reduce pumping resistance.

2. Wellbore Cleaning: Enhances cutting-carrying capacity, effectively clearing bottom-hole cuttings.

3. Flocculation and Encapsulation:  Forms easily removable flocs from drill cuttings, keeping the borehole clean.

4. Inhibition of Shale Hydration: Prevents shale swelling, reducing wellbore instability risks.

5. Thermal and Contamination Resistance: Boosts fluid stability under high temperatures and in pollutive environments.

6. Fluid Loss Reduction: Maintains low API fluid loss, protecting formation integrity and reducing fluid loss.

7. Lubrication and Drag Reduction: Improves lubricant properties, reducing tool wear and extending lifespan.

Applicable Range:

1. Temperature: Suitable for operations at temperatures ≥220°C.

2. System Compatibility: High-temperature, high-density water-based drilling fluid systems.

3. Recommended Dosage: Typically between 2.0% and 6.0%, adjusted according to the drilling fluid formulation and field conditions.

Case Study

During the drilling of the Songke-2 Well, which started on April 13, 2014, and completed on March 17, 2018, it became the world's first scientific borehole to penetrate the largest continental formation from the Cretaceous period. The project provided valuable data on Earth's climate and environmental changes from 65 million to 140 million years ago. The well reached a final depth of 7018.88 meters, with an in-situ continuous geophysical log of 7018 meters from the Songliao Basin.

As part of the International Continental Scientific Drilling Program (ICDP), it set world records in scientific drilling, with a maximum recorded bottom-hole temperature of 241°C. The effective drilling cycle comprised 1147 days, overcoming extreme challenges such as ultra-high temperatures and large-diameter coring, obtaining 4.15 million sets of data totaling 24 TB, and achieving a core recovery rate of 96.6%.

Utilizing high-temperature polymer-based drilling fluids, the project addressed challenges such as high formation temperatures and fractured formations with impressive results, with core retrieval rates and efficient fluid stabilization and control mechanisms ensuring the well's completion.