基于双向数据无缆传输的分层注水技术

Separate-layer waterflooding technology based on bidirectional cable-less data transmission

孙鹏 何祖清 彭汉修

SUN Peng HE Zuqing PENG Hanxiu

中国石化石油工程技术研究院 页岩油气富集机理与有效开发国家重点实验室 中国石油大学(华东)石油工程学院

SINOPEC Research Institute of Petroleum Engineering, Beijing 100101, China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China

老油田注水井套损逐年增多，层间矛盾突出，传统分层注水调配测调工作量大、周期长、效率低，为此，进行了智能分层注水技术研究，实现了温度、压力、流量及水嘴状态等参数双向无缆传输和注水量实时调配。井下双向数据无缆传输系统由地面系统和井下系统组成，地面系统包括地面信号控制系统、控制电路，井下系统包括压力波双向通讯系统、双向锚、智能配水器。进行了智能完井室内模拟，验证了控制指令及控制电路的有效性和可靠性，并进行了7口井的现场试验，结果表明，双向数据传输成功率100%，分层注水调配成功率100%。该技术可为提高水驱油藏开发效果及降本增效提供很好的技术支撑。

Mature oilfields are challenged by increasing casing damages in water injectors, prominent interlayer contradictions, and intensive water regulation/metering workload, long period and low efficiency in traditional separate-layer waterflooding. The intelligent separate-layer waterflooding technology was investigated to enable the bidirectional cable-less data transmission of parameters such as temperature, pressure, flow rate and nozzle state and the real-time regulation of injector rate. The bidirectional cable-less data transmission system is composed of surface system (incl. surface signal control system and control circuit) and downhole system (incl. pressure wave intercommunication system, bidirectional anchor, and intelligent water distributor). Laboratory simulation of intelligent well completion was performed to verify the effectiveness and reliability of control command and control circuit. Moreover, field tests in 7 wells demonstrate the success rate of 100% for both bidirectional data transmission and regulation on separate-layer water injection. The proposed technology provides a valuable support to the improvement of reservoir waterflooding performance, cost reduction and benefit increasing.

10.13639/j.odpt.202208079