关键词: 机械采油, 提效, 井筒治理, 数字化, 标准化, 示范区

Abstract: Artificial lift is the main oil production mode in Daqing Oilfield but now faces a series of issues, such as large quantities of artificial lift wells, difficult to control total energy consumption, one reservoir block quite different from another one, difficult to improve artificial lift indictors, prominent contradiction between less working staff and more oil wells and difficulty in management. Therefore, the study was made of the renovation technology to improve artificial lift efficiency for old oilfields. Five major projects were launched for this purpose, such as artificial lift efficiency improvement, wellbore treatment, artificial lift digitalization, artificial lift standardization, and construction of the demonstration zone. A series of technologies, including node analysis technology of pumping unit, even thickness elastomer PCP production technology and ultra-long stroke production technology, are applied for artificial lift efficiency improvement, thus the reasonable flow pressure. In the area of wellbore treatment, a measure chart was formulated to raise the wellbore treatment level. As for inspection, appraisal, maintenance and operation of new products and new technology, a total of 25 items of criteria were formulated and revised during the 13th Five-Year Plan period. In the area of artificial lift digitalization, the diagnosis and analysis model for the working conditions, which is based on the electrical parameters, was established in the efforts to develop the electrical parameter-based pumping unit and automatically-optimized operational technology.The efficiency-improving technological integration was applied in the two demonstration zones in A Oilfield in the old oil area and B Oilfield in the surrounding area. A total of 131×10⁴ kW·h of electric energy was saved following adoption of those measures. The pump inspection rate decreased by 2.0% and 0.9% respectively in the two zones, showing remarkable application results.