Development and Application of Eco-Friendly Micro-Nano Filtrate Reducers and High-Performance Water-Based Drilling Fluids
Journal Title: Acadlore Transactions on Geosciences - Year 2024, Vol 3, Issue 2
Abstract
The utilization of oil-based drilling fluids is a significant technical approach for drilling in ultra-deep, unconventional, and other complex hydrocarbon reservoirs. However, these fluids present notable disadvantages, including high preparation costs and environmental pollution. There is an urgent need to develop an eco-friendly, high-performance water-based drilling fluid system suitable for complex geological conditions to support the exploration and development of oil and gas under deep, challenging, and unconventional conditions. Addressing the current issue where polymer filtrate reducers cannot simultaneously achieve temperature resistance, salt resistance, and environmental performance, a novel organic/inorganic composite micro-nano filtrate reducer (MNFR) was developed using inverse emulsion polymerization. The MNFR has a D50 particle size of 1.313μm, withstands temperatures up to 200℃, resists saturated NaCl brine, and exhibits an EC50 biotoxicity value of 86700 mg/L. Furthermore, a high-temperature-resistant (up to 200℃) eco-friendly high-performance drilling fluid system (HBHP) was constructed, demonstrating excellent rheological and filtration properties, with a high temperature and high pressure (HTHP) filtration volume of only 7.6mL and an EC50 biotoxicity value of 54300mg/L. It also shows outstanding plugging, anti-collapse, and hydration inhibition properties. The HBHP system has been applied in three wells in the Shengli oilfield, with no complex situations related to wellbore stability occurring during field operations, thus providing technical support for the green development of complex hydrocarbon reservoirs such as deep, ultra-deep, offshore deepwater, and unconventional formations.
Authors and Affiliations
Liu Junyi, Xia Ye, Ma Juli
Keywords
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- EP ID EP752412
- DOI 10.56578/atg030204
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