论文部分内容阅读
综合湖北地区二迭系沉积特征、岩相古地理、地化指标、荧光性质、油气显示等生油指标分析,认为本区二迭系是良好生油层,并确定其生油指标的下限值。通过煤牌号、定碳比、镜质体反射率、牙形刺颜色、有机差热、吸附烃、族组分、油气特征等资料分析,认为本区二迭系有机质处于高成熟、过熟和甲烷变质阶段。油气演化属于晚期、后期及后期破坏阶段,归纳得出油的演化下限和气的演化下限。根据油、气演化下限,将本区划分为找油、气有利区和含油、气较差区。湖北地区二迭系地层分布较广泛,是主要勘探目的层之一。经过历年来的勘探,已在湖北四川交界地区找到了气田和含气构造,并发现油、气苗和沥青共50余处,证实该区有过油、气生成的历程。不同地区油、气苗性质的不一,是热演化程度高低的差异性所致。
Based on the analysis of sedimentary characteristics, lithofacies palaeogeography, geochemical indicators, fluorescence properties and hydrocarbon generation indicators of Permian in Hubei Province, it is considered that the Permian system in this area is a good oil reservoir and the lower limit value . According to the analysis of coal grade, C / C ratio, vitrinite reflectance, conodont color, organic difference heat, adsorbed hydrocarbons, clastic components and hydrocarbon characteristics, it is concluded that the organic matter in the Permian in this area is in a high maturity, Metamorphic stage. Oil and gas evolution belongs to late stage, late stage and later stage of destruction, and the lower limit of evolution and the lower limit of evolution of gas are deduced. According to the lower limit of evolution of oil and gas, the area is divided into areas of favorable oil and gas, and areas of poor oil and gas. The Permian strata in Hubei Province are widely distributed and are one of the major exploration target strata. After years of exploration, gas fields and gas-bearing structures have been found in the border areas of Sichuan and Hubei provinces. More than 50 oil, gas and asphalt sources have been found, confirming the history of oil and gas generation in this area. Different regions have different oil and gas properties, which is caused by the difference in the degree of thermal evolution.