Xiaoqi Wang

In response to the growing demand for high-power, low-temperature tolerant, long-life, and high-safety electrochemical energy storage systems at oilfield well sites in the oil and gas industry, this research explores novel distributed electrochemical energy storage technologies. In the field of lithium titanate (LTO) batteries, internationally advanced high-performance LTO anode materials have been developed. Pilot-scale production of independently developed LTO materials was successfully completed, leading to the manufacture of two types of LTO cells (18650 and 60138 models). Based on these LTO cells and corresponding module products, a 100 kWh skid-mounted energy storage container was developed. A multi-hundred-kilowatt-hour-level energy storage system was deployed to demonstrate photovoltaic energy storage for oilfield power consumption, significantly increasing the renewable energy penetration rate. In the area of aqueous zinc-ion batteries, high-energy and high-power-density cathode materials were developed. A gradient fluorinated alloy 3D framework coating technology was established, greatly enhancing the cycling stability of the zinc anode, with performance reaching internationally advanced levels. Pilot-scale amplification using industrial-grade raw materials was carried out, producing highly stable aqueous zinc-based battery cells. A 100 kWh containerized system was integrated and deployed in an oilfield, representing China’s first demonstration of an aqueous zinc-based energy storage system. For sodium-ion batteries, a high-voltage, long-life NCMT-Mg cathode material was developed, along with a carbon-free anode material exhibiting extended cycle life and world-class performance. Pilot-scale production of the cathode material via a physical method was completed, and a full manufacturing process for sodium-ion battery cells was established. A multi-hundred-kilowatt-hour sodium-ion battery energy storage system was integrated and deployed at Yumen Oilfield for high-altitude low-temperature demonstration applications. Additionally, in the area of oilfield microgrid equipment and energy management software, a controller suitable for oilfield smart microgrids was developed, alongside intelligent microgrid scheduling algorithms and software. A demonstration project of a smart microgrid integrating multiple energy sources and loads was successfully implemented in an oilfield.

Co-author/s:

Shengchi Bai, Senior Engineer, Research Institute of Petroleum Exploration and Development (RIPED), CNPC.

Kang Wang, Senior Engineer, Research Institute of Petroleum Exploration and Development (RIPED), CNPC.

Rui Yang, Engineer, Research Institute of Petroleum Exploration and Development (RIPED), CNPC.

Wen Wen, Engineer, Research Institute of Petroleum Exploration and Development (RIPED), CNPC.

Yiheng Li, Engineer, Research Institute of Petroleum Exploration and Development (RIPED), CNPC.

Lin Zhang, Engineer, Research Institute of Petroleum Exploration and Development (RIPED), CNPC.