MicroDRIL-HTHP WBM Technology & Products

n  Technical Introduction

    With the increasing expansion of exploration into deep and ultra-deep wells, along with the rise of special and complex wells, the demand for effective drilling operations under high-temperature and high-pressure conditions is on the rise. To address the challenges posed by conditions such as temperatures of 220°C and densities of 2.0g/cm3, a new high-temperature and high-density water-based drilling fluid system has been developed. This system offers improved rheology, reduced filtration loss, and environmental friendliness by gradually phasing out sulfonated materials.

n  Technical Features

    ( 1 )   Enhanced Rheology: The system exhibits excellent rheological properties, with a plastic viscosity of less than 50mPa.s (@2.0g/cm3) and dynamic shear forces ranging from 5 to 10Pa, ensuring optimal flow profiles.

    ( 2 )   Thermal Stability: Demonstrating superior thermal stability, the system shows no thickening even after aging at 220°C for 16 hours, maintaining stability in sticking and cutting.

    ( 3 )   Effective Plugging Performance: With high-temperature and high-pressure PPA filtration loss of less than 15mL, the system effectively blocks formations, reduces pressure transmission, enhances mud cake formation, and stabilizes the wellbore.

    ( 4 )   Resilient Against Pollution: The system exhibits strong tolerance to salt, calcium, clay, and shale invasion, ensuring reliable performance even in challenging conditions.

    ( 5 ) Environmental Compatibility: Major materials utilized in the system are manufactured through non-sulfonated processes, significantly improving environmental performance compared to traditional sulfonated materials. 

n  Application

    The MicroDRIL system finds application in both offshore and onshore oilfields, including high-temperature wells. Notably, it has been successfully employed in a 204°C high temperature well in Qinghai, where it demonstrated stable rheology and filtration loss, remarkable temperature resistance, and a 39.5% reduction in drilling cycle compared to design, significantly enhancing operational efficiency. Furthermore, the system has been utilized in the construction of national key scientific exploration wells, such as the Songke 2 well by the Exploration Technology Institute of the Geological Survey, with bottom well temperatures reaching as high as 241℃.