Research on Gas Channeling Prevention and Control in Collaborative Reservoir Construction of Massive Oil Reservoirs

The M area of Nanpu is a blocky and highly volatile oil reservoir. In the early stage of water injection development, the distribution pattern of oil, gas and water was complex, and the reservoir energy was exhausted before the reservoir was built. Gas cut prevention and control is a key technology for collaborative database construction. This paper analyzes the gas flooding mechanism and its influencing factors in the collaborative reservoir construction of block-shaped reservoirs. Through numerical simulation and combined with reservoir engineering algorithms, the research on the influencing factors of gas diversion in collaborative reservoir construction is carried out. The research results show that: ① The influence of sedimentary microfacies, reservoir physical properties and the maintenance level of formation pressure all affect the stable formation of the gas–liquid interface; ② In the high-permeability area of the main waterway and the low-pressure area of the high structural parts, gas flooding takes effect quickly but is prone to gas flow. ③ Reasonable injection and extraction height difference and reasonable liquid drainage speed can effectively prevent gas cut, accelerate the efficiency of liquid drainage and capacity expansion, and increase the crude oil recovery rate. The research results provide technical support for the efficient and collaborative construction of block oil reservoirs and the improvement of crude oil recovery rate.