关于油气聚集量问题

ON THE ACCUMULATION AMOUNT

盛志纬

Sheng Zhiwei

北京石油勘探开发科学研究院

Scientific Research Institute of Petroleum Exploration and Development, Ministry of Petroleum Industry

本文提出油气聚集量的含义是指聚集在具有工业价值油气藏内的油气总量;聚集系数为聚集工占排烃量的百分比:排烃系数为生油层排烃有效厚度内的排烃量与有效厚度内已生油量的百分比.讨论了聚集系数与排烃系数之间的关系及其表示方法.指出在勘探早期作资源量预测时,应借用已知区每个生、储油层配置体系为单元的聚集系数,求出其分区聚集量,累加而得到全区总资源量是目前能够相对准确地估算油气聚集量的主要方法.

The concept of the accumulation amount is briefly introduced. Attention is paid to discussing three different views on accumulation coefficient. It is considered that the coefficient should be equivalent to the percentage of the accumulation amount of oil and gas relative to the volume of primary migration in source beds. Furthermore, the relation between the coefficient of accumulation and that of hydrocarbon expulsion is discussed. Macroscopically the former is much larger than the latter. The mean value for the accumulation coefficient of oil and gas is about 50%; and that of hydrocarbon expulsion, generally ranges from 10-20%. Finally, the collocation system of a source-reservoir pair should be regarded as an unit in analogue computation. Such consideration should be applied in the research of resources estimation.

https://doi.org/10.11781/sysydz198903228