HIDRIL high-temperature high-density oil-based drilling fluid is an advanced drilling fluid system specifically developed for deep and ultra-deep well operations requiring extreme high temperature and high density. This system achieves excellent performance under high-temperature and high-pressure complex formations through the synergistic effect of specially designed emulsifiers and various functional additives. HIDRIL enhances the density and temperature resistance of the drilling fluid while improving its shear control, lubricating properties, inhibiting abilities, sealing effectiveness, and corrosion resistance, making it an essential tool for modern drilling projects dealing with extreme conditions.

Features

1.    Ultra-High Temperature Stability: HIDRIL drilling fluid can withstand temperatures exceeding 240°C, ensuring safe drilling operations in extreme geothermal environments.

2.    High-Density Adaptability: The density can reach up to 2.90 g/cm³, meeting the stringent high-density requirements for ultra-deep well operations.

3.    Excellent Rheological Control: Through precise adjustments, it achieves ultra-low shear operations, reducing the load on the circulation system and improving drilling efficiency.

4.    Strong Contamination Resistance: It maintains a stable emulsion structure even under high concentrations of saltwater contamination, allowing ample time for surface treatment.

5.    Good Field Adaptability: High-density weighting materials are easy to disperse and dissolve, adapting to operational needs under different shear conditions.

6.    Wide Compatibility: Compatible with diesel-based and white oil-based drilling fluids, enabling flexible application in various operational environments and requirements.

Advantages

1.    Improved Drilling Efficiency: Ultra-low shear and excellent lubricating properties reduce resistance and torque during drilling, speeding up the drilling process.

2.    Enhanced Wellbore Stability: Strong inhibitive properties and micro-sealing capabilities effectively prevent formation swelling and collapse, improving wellbore stability.

3.    Reduced Operational Risks: Stable performance under high temperature and pressure reduces the likelihood of drilling accidents, enhancing operational safety.

4.    Protection of Oil and Gas Layers: Excellent corrosion resistance and low oil and gas layer damage characteristics favor effective protection and efficient development of oil and gas resources.

5.    Simplified Operational Processes: The supporting key treatment agent system simplifies the preparation and maintenance of the drilling fluid, reducing operational difficulty and costs.

Applications

1.    High-Temperature Environments: HIDRIL drilling fluid resists temperatures over 240°C, meeting the demands of drilling operations in extreme high-temperature environments. This temperature resistance ensures stable drilling fluid performance in high-temperature deep and ultra-deep wells, increasing operational safety.

2.    High-Pressure Saltwater Layers: In localized high-pressure saltwater layers, HIDRIL drilling fluid demonstrates strong contamination resistance. Even under 30% saltwater contamination, it maintains a stable emulsion structure, providing sufficient time for surface treatment. This characteristic ensures safe drilling operations in high-pressure saltwater environments.

3.    Fractured Formations: For fractured formations, HIDRIL drilling fluid’s high density and strong inhibitive properties provide good wellbore support, preventing wellbore collapse and drilling accidents.

4.    High-Stress, High-Angle Formation: In complex geological structures such as the Kuqa Mountains, high stress and steep angles result in abnormally high formation pressure and collapse stress. HIDRIL drilling fluid, through its excellent rheological control and lubricating properties, reduces resistance and torque during drilling, improves drilling efficiency, and effectively addresses the challenges posed by these complex formations.

5.    Complex Geological Conditions: In complex geological structures such as the Tarim Kuqa Mountains, HIDRIL drilling fluid has been successfully applied in dozens of wells, achieving good results. These well sections commonly face challenges such as thick composite salt layers, high-pressure saltwater layers, high-pressure oil and gas layers, and fractured formations. However, HIDRIL drilling fluid has successfully met these challenges with its exceptional performance and wide applicability.

The successful application of HIDRIL high-temperature high-density oil-based drilling fluid in complex geological conditions, such as in the Kuqa Mountains, has demonstrated its outstanding performance and wide applicability. This system has set an international record for the highest density in high-density well operations and has excelled in tackling challenges like extensive salt layers, strong creep soft mudstones, and continuous saltwater contamination. The use of HIDRIL drilling fluid not only enhances the safety and efficiency of drilling operations but also provides robust support for the efficient development of oil and gas resources.

System Supporting Additives

HIEMUL Main Emulsifier

HICOAT Auxiliary Emulsifier

Key Additive HIEMUL Main Emulsifier Introduction
HIEMUL main emulsifier is an efficient emulsifier specifically designed for the HIDRIL high-temperature high-density oil-based drilling fluid technology. It utilizes advanced synthetic technology to optimize molecular structure and chemical properties, ensuring excellent emulsification effects and drilling fluid performance even under harsh conditions of high temperature and high pressure.

Functions

1.    Enhanced Emulsification Effect: HIEMUL main emulsifier significantly reduces the interfacial tension between oil and water, enhancing the emulsification effect of oil-based drilling fluids, allowing for a stable mixture of oil and water to form a uniform emulsion.

2.    Improved Drilling Fluid Performance: By optimizing the rheological properties and shear control capability of the drilling fluid, HIEMUL main emulsifier enhances the lubricating properties, contamination resistance, and wellbore stability of the drilling fluid, thereby reducing friction resistance and torque during drilling and improving efficiency.

3.    High-Temperature and High-Pressure Resistance: This emulsifier possesses excellent high-temperature and high-pressure resistance, maintaining stable emulsification effects and drilling fluid performance in high-temperature and high-pressure environments, meeting drilling needs in complex geological conditions.

Applicable Range

1.    Temperature: Generally, this emulsifier can maintain stable emulsification effects and drilling fluid performance in high-temperature environments exceeding 240°C, meeting the demands of high-temperature drilling operations.

2.    System: Primarily suitable for the HIDRIL high-temperature high-density oil-based drilling fluid system.

Key Additive HICOAT Auxiliary Emulsifier Introduction
HICOAT auxiliary emulsifier is one of the key treatment agents in the HIDRIL high-temperature high-density oil-based drilling fluid technology system. Acting as an auxiliary emulsifier, it collaborates with the main emulsifier HIEMUL to ensure that the oil-based drilling fluid maintains excellent performance under high-temperature and high-density conditions. This auxiliary emulsifier enhances the stability and contamination resistance of the drilling fluid by optimizing molecular structure and formulation, thereby meeting the demands of complex formation drilling.

Functions

1.    Enhanced Emulsion Stability: HICOAT auxiliary emulsifier works in synergy with the main emulsifier to maintain a stable emulsified state of the oil-based drilling fluid under high temperature and pressure, preventing oil-water separation.

2.    Improved Contamination Resistance: It enhances the drilling fluid's resistance to contaminants such as saltwater and cuttings, reducing the impact of contamination on drilling fluid performance.

3.    Improved Rheological Properties: Adjusts the rheological properties of the drilling fluid to operate under low shear conditions, lowering the load on the circulation system at the drilling site.

4.    Wellbore Stability Protection: Helps maintain wellbore stability, preventing wall collapse and ensuring safe drilling operations.

5.    Enhanced Lubrication: Improves the lubricating properties of the drilling fluid, reducing drill bit wear and increasing drilling efficiency.

Applicable Range

1.    Temperature: HICOAT auxiliary emulsifier has excellent high-temperature resistance, maintaining stable performance in high-temperature environments exceeding 240°C.

2.    System: Primarily suitable for the HIDRIL high-temperature high-density oil-based drilling fluid technology system.

Case Studies

This system has been successfully applied in over 20 wells in the Kuqa Mountains, achieving smooth operations, including one high-density well that set an international record for the highest operational density. During drilling through extensive salt layers, the operation proceeded smoothly, and the system demonstrated good inhibition capabilities against strong creep soft mudstones, maintaining good performance during continuous saltwater contamination.

In the Ke Shen block, the formation pressure is generally high, necessitating effective pressure control technology during drilling to prevent blowouts and other incidents. High-temperature environments impose higher demands on the performance of drilling fluids, the durability of drill bits, and the heat dissipation capability of drilling equipment. Some formations contain hard rocks, making rock-breaking difficult and resulting in low mechanical drilling rates.

The Ke Shen 10-5 well was designed to a depth of 6995 meters, with an actual completed depth of 6963 meters. The high-temperature high-density oil-based drilling fluid used in the Ke Shen 10-5 well achieved a maximum density of 2.70 g/cm³, setting an international record for operational well density. The operation proceeded smoothly through extensive salt layers, and the system demonstrated good inhibition capabilities against strong creep soft mudstones, maintaining good performance during ongoing saltwater contamination.