Maximum pressure of injection wells over faults in specific well patterns——by taking the well pattern of one injection and three production in Bohai S oilfield as an example

Water injection pressure is one of the key parameters of offshore water injection development. It is of great significance for the safe and efficient development of offshore oilfields to determine the reasonable pressure according to the characteristics of faults. In order to analyze the safety of water injection wells near faults in Bohai S oilfield, based on the superposition principle of potential and the mirror reflection principle of boundary, the pressure distribution of water injection wells acting on faults is deduced for the injection-production well pattern of one injection and three production near the closed faults. Through the calculation of the actual water injection well pressure in Bohai S oilfield, it is proved that the well is safe at present, and the pressure distribution system has a certain popularization value for the study of the safety of water injection wells near faults.