气顶油气田气顶气窜研究

A RESEARCH ON GAS CHANNELINGS IN GAS CAP OIL RESERVOIR

文章以夏子街油田三叠系油气藏为例 ,讨论了油气藏油井气窜特征及其机理。该油气田由于是开发初期 ,注水工作滞后、初期采油速度偏高、地层压力下降快等因素引起气顶气窜。通过对气窜的研究 ,结合数值模拟技术和类比法 ,确定了油气藏油井气窜的划分标准 ,建立了油藏油井气窜机理模型和气顶气窜类型。研制了一套适合本油气田气窜气量的劈分方法 。

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.