A RESEARCH ON GAS CHANNELINGS IN GAS CAP OIL RESERVOIR

By taking the Triassic oil and gas reservoir in Xiazijie oil field as an example,the properties and mechanisms of gas channelings in oil wells in the reservoir are discussed in the paper.Because the oil and gas field is in the initial stage of development,the gas cap gas channelings have occurred as a result of delayed water injection,slightly high oil production rate and rapid formation pressure drop.Through a research on the gas channelings in the oil wells in the reservoir and in combination with the numerical simulation technique and analogy method,the standard of dividing the gas channelings and their types are determined and their formation mechanism model is set up in the paper.Being suitable for the oil and gas field,a set of methods of cleaving the channeling gas amounts are developed and the influences of the gas cap gas channelings and different gas cap development schemes on the oil reservoir are discussed in the article also.