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In 2005, the company successfully developed a multi-acid acidizing system, a slow-release acid system with multi-stage ionization and deep penetration capabilities. Compared to conventional acidizing systems, this system significantly improves acidizing effectiveness in complex reservoirs. The system was first successfully applied in 2007 at CNOOC’s BZ34-2 Oilfield, and it was subsequently scaled up in oilfields including Qinghai Oilfield, Liaohua Oilfield, and Yumen Oilfield, achieving excellent reservoir modification results.
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In 2020, the company launched a new channel fracturing technology in Jilin Oilfield. This technology allows proppants to aggregate into clusters to form high-conductivity channels, with post-fracturing single-well production significantly higher than the average block production.
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In 2021, the company advanced the application of non-radioactive tracers in Zhongyuan Oilfield. This product is safe, environmentally friendly, and highly accurate, solving challenges related to post-fracturing fluid tracking, production profile analysis, and fracturing segment optimization.
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From 2024 to 2025, the technology will be applied to hundreds of wells in Changqing Oilfield, achieving excellent results.
Typical Cases
High-efficiency deep penetration acid is primarily used in acidizing or acid fracturing processes in oil and gas field development. It is an acidic chemical widely applied in petroleum exploration, extraction, and other fields. Through the chemical dissolution action of the acid solution, it dissolves formation blockages, expands or extends formation fractures, restores and improves the formation permeability, and reduces oil flow resistance or injection water resistance, thereby achieving the goals of increased oil production and enhanced water injection in wells.
Product Features
Application Effect Comparison:
High-efficiency dissolution: Capable of dissolving difficult-to-dissolve substances such as limestone and calcite.
High permeability: Can rapidly penetrate the formation, acting on oil and gas reservoirs to improve recovery rates.
Effect Summary
|
Well Number |
Xi 41-28 Well |
Before Construction |
After Construction |
|
Xi 41-28 Well |
Water Injection, m3 |
1 |
15 |
|
Casing Pressure, MPa |
24 |
21.5 |
After the treatment, the water injection volume significantly increased, and the casing pressure dropped, effectively improving the water injection efficiency. This confirms the excellent performance of this technology in water injection enhancement.