A reconstruction method of porosity for clastic reservoirs during the crucial period of hydrocarbon accumulation

作者：Qu Dongfang^*; Jiang Zhenxue; Liu Huimin; Gao Yongjin

来源：Acta Petrolei Sinica, 2012, 33(3): 404-413.

• Clastic reservoirs
• Diagenesis
• Diagenetics
• Dongying sag
• Geological conditions
• Geological history
• Hydrocarbon accumulation
• Hydrocarbon accumulation period
• Influencing factor
• Reconstruction method
• Reservoir porosity
• Shahejie formation

A hydrocarbon accumulation process is an event of geological history. In order to better understand this event, the reconstruction of reservoir porosity during geological history, especially in a crucial period of hydrocarbon accumulation, can help in quantitatively reconstructing geological conditions of hydrocarbon accumulation. Based on a geological thought of "uniformitarianism", the present paper established a new method to reconstruct reservoir porosity of the crucial hydrocarbon accumulation. Taking the 4th member of the Shahejie Formation as an example and based on its classification of diagenetic types and stages, we proposed a new concept of combined porosity influencing factor (F for short) by investigating factors that influence the porosity of sandstones with a certain depth at different diagenetic stages, established an evolutionary curve of porosity that is restricted by combined porosity influencing factors, and finally reconstructed the paleo-porosity in crucial hydrocarbon accumulation periods for the 4th member of the Shahejie Formation in the Cao 11-Wang 59 section of the Dongying sag by applying this porosity evolutionary curve. The result shows that the application of this method can achieve a convincing result in reconstructing paleo-porosity.

• 出版日期2012
• 单位中国石油大学（华东）