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Sinopec News Network News As of June 10, the North China Oil and Gas Branch has used the developed high-efficiency imbibition synergistic surfactant to carry out oil well huff and puff production.
A total of 70 wells have been used, and the efficiency of the measures has exceeded 80%.
The average single-well refueling The surface active agent was 0.
8 tons, and the cumulative oil increase in the phase was 6,055 tons
.
The produced reserves of Chang 8 reservoir in Honghe Oilfield accounted for 61.
7% of the produced reserves of tight oil reservoirs in southern Hubei, with a recovery rate of 1.
24%, a low recovery rate and a large resource potential
.
However, due to the dense reservoirs of Chang 8 reservoir in Honghe Oilfield, the formation energy is low, and the low liquid and low oil production of oil wells under natural energy development have seriously affected the development effects and benefits of the entire block
.
Through geo-engineering integrated research, it is clear that the crude oil production in the matrix pores around the fractures in the formation is low, but due to insufficient formation energy and dense matrix pores, the matrix pores have poor oil supply capacity to the fracture system
.
Aiming at the reservoir geological characteristics and remaining oil enrichment characteristics of Chang 8 reservoir in Honghe Oilfield, the research and development of high-efficiency imbibition surfactant system has been carried out to form a tight oil surfactant huff and puff oil production technology.
This technology can not only increase formation energy, but also change The wettability of the rock surface and the reduction of oil-water interfacial tension can effectively improve the efficiency of crude oil imbibition replacement between the fracture system and the matrix pores, and achieve the goal of increasing the production of a single well
The successful application of surface active agent huff and puff oil production technology in Chang 8 reservoir of Honghe Oilfield opened up new ideas and methods for improving the quality and efficiency of tight oil reservoirs, and provided technical support for increasing production of Chang 8 reservoir in southern Hubei
(Strong Star)
