石油实验地质Issue(2)：160-164,5.DOI:10.11781/sysydz201402160
潍北凹陷地层压力演化特征及其对油气分布的影响
Characteristics of formation pressure evolution and impact on petroleum distribution in Weibei Sag
摘要
Abstract
Based on measured pressure and fluid inclusion data, the current formation pressure, the paleopre-ssure during petroleum accumulation and the characteristics of pressure evolution in the Weibei Sag were studied by means of basin modeling technology. At present, the formation pressure in the study area can be divided into 2 segments vertically:normal pressure above 2 300 m and low pressure below 2 300 m, mainly found in the 2nd member of the Kongdian Formation in the north. The paleopressure during petroleum accumulation period mainly appeared to be low overpressure. Basin modeling showed that the formation pressure in the 2nd member of the Kongdian Formation evolved through 3 levels:“pressure accumulation-pressure release-pressure differentiation”. Due to different preservation conditions, the pressure evolution was divided into 3 patterns:“normal pressure-over pressure-low overpressure”, “normal pressure-over pressure-low pressure”, and “normal pressure-low overpressure-normal pressure”. Since the southeast of the sag was eroded obviously during accumulation, and the formation pressure decreased rapidly, this area became the target for petroleum migration.关键词
地层压力/压力演化/油气分布/潍北凹陷/渤海湾盆地Key words
formation pressure/pressure evolution/petroleum distribution/Weibei Sag/Bohai Bay Basin分类
能源科技引用本文复制引用
刘华,王鑫,徐昊清,李振升,陈柯童..潍北凹陷地层压力演化特征及其对油气分布的影响[J].石油实验地质,2014,(2):160-164,5.基金项目
国家重大科技专项（2011ZX05006-003）和山东省自然科学基金（ZR2011DL009）联合资助。 （）
