Breakthrough Achieved in Liquid Production Profile Logging at the Bayan Oilfield in the North China Oilfield

China Petroleum News (Special Correspondent Xiong Qiaohong, Contributing Reporter Ma Yunlu) On May 6, reporters learned that Well Xinghua 12-44X—the core production well for the CCUS-EOR pilot project at the Bayan Oilfield in the North China Oilfield—successfully completed liquid production profiling logging operations. This marks a major breakthrough in conventional liquid production profiling logging for high-viscosity, naturally flowing production wells in the North China Oilfield.
A liquid production profile refers to the process of determining the production ratios and flow rates of oil, water, and carbon dioxide in each perforated zone along the vertical axis of an oil and gas production well. It identifies the main oil-producing zones, low-mobility zones, gas-producing zones, and aquifers, and assesses the distribution, migration direction, and breakthrough locations of carbon dioxide within the wellbore and formation. This provides essential data to support subsequent gas migration control, drive adjustment, and enhancement of the swept volume.
Faced with the challenge of having no established best practices to follow, the Bayan Oilfield, in collaboration with CNPC Logging and specialized technical service teams, formed a task force to conduct comprehensive technical research. During the operation, technical supervisors directed operations on-site, providing continuous oversight and coordination to ensure seamless collaboration among the four parties involved, thereby shortening the overall operation time. They also coordinated the use of heating cables to insulate the blowout preventer (BOP) during fluid-production profile logging, minimizing crude oil temperature loss in the wellbore and at the wellhead to the greatest extent possible. After 35 hours of continuous effort, the team achieved perfect equipment integration, high-quality data acquisition, and a successful first-time implementation of the process.
This breakthrough is of far-reaching significance. In terms of data value, the complete and accurate fluid production profile data obtained provides a scientific basis for carbon dioxide mixed-phase flooding, reservoir development understanding, and comprehensive management decisions. In terms of experiential value, this successful exploration has accumulated a comprehensive set of technical and management expertise regarding “self-flow fluid production profiles for high-viscosity oil,” forming a replicable and scalable “Bayan Solution” that serves as a practical model for logging operations in similar high-viscosity oil production wells.