To build a new model of low-carbon and efficient surface system in Dagang Oilfield

On August 22, the oil and gas produced by the oil Wells under the supervision of Wangxuzhuang Oilfield in Dagang was directly transported to the joint station, and low-carbon and efficient operation was realized through the first-level distribution station.

In order to promote green development, Dagang Oilfield has gradually promoted the application of a new surface system model. Conventional and heavy oil fields such as Gangxi and Xiaoji have also opened the prelude to the transformation of a new surface model, by greatly simplifying the process flow, reducing the scale of the system, saving various costs, and reducing comprehensive energy consumption and carbon dioxide emissions. The new ground system model built in Dagang Oilfield can reduce the comprehensive energy consumption of tons of oil production by 20%, the comprehensive energy consumption of tons of liquid production by 19%, and the investment in ground construction of one million tons of production capacity can be effectively reduced, reaching the advanced level of joint stock companies.

In the past 60 years of development and production of Dagang Oilfield, problems such as complex ground construction conditions, large scale, long process flow, low system efficiency, high operation energy consumption, and large failure risk have gradually emerged, and the pressure of cost reduction and investment control has gradually increased. The traditional construction mode does not meet the requirements of modern oilfield efficiency and production.

At the same time, Dagang Oilfield is located in the hinterland of Beijing-Tianjin-Hebei, and it is in urgent need of technological research and optimization of technological layout to realize the coordinated development of oilfield development, environmental protection and local economy, and a harmonious and win-win situation.

Based on the characteristics of complex fault block reservoirs and complex surface conditions, Dagang Oilfield quantitatively predicts the optimal direct transport distance from well to joint station through working condition simulation and other technical means in the layout of gathering system, constructs the layout of gathering station and pipe network structure with minimum energy consumption, and supports multi-energy complementary, clean substitution, closed emission reduction technologies. The traditional multi-stage transfer, pressurization and heating is transformed into a closed direct transmission from the well to the combined station, which reduces the per-ton oil gathering and transportation unit consumption by 34%.

In terms of injection system layout, Dagang Oilfield takes maximum efficiency and minimum energy consumption of injection system as the goal, comprehensively considers construction investment and operation cost, constructs the injection system efficiency evaluation and production operation optimization model, realizes the optimal configuration of injection network and injection station, and improves the injection system efficiency by 7%.

In terms of pipeline failure prediction and management, Dagang Oilfield has invented a quantified and characterized pipeline risk assessment and failure consequence prediction method, established a ground corrosion protection system based on the whole life cycle, and realized the transformation from passive post-emergency repair to active predictive and preventive maintenance, greatly improving the essential safety and security capability of the system.