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分析了油气不均一聚集的重要性，认为“聚集系数”这一平均概念在油气资源评价中的局限性越来越明显。含油气系统中有成因联系的一群油气藏具有储量规模序列之间的内在联系，以此为理论基础，定义了油气聚集度（同一含油气系统中一群有成因联系的油气藏，按储量规模大小排序后，前若干个油气藏储量之和在所有油气藏总储量中所占百分比）。应用这一特征参数，可描述含油气系统中油气不均一聚集现象，并可对其理论聚集度进行动态分析，预测最终油气聚集度。改进了描述油气藏规模序列结构的Ｚｉｐｆ模型，提出修正Ｚｉｐｆ模型，用于计算油气藏群的理论聚集度。用该修正模型拟合塔里木盆地轮南低隆地区截至１９９５年底发现的三叠系油气藏储量规模序列，认为该地区油气聚集丰度中等。图１参９（王孝陵摘）
The importance of non-uniform accumulation of oil and gas is analyzed. It is considered that the limitation of “average concentration coefficient” in oil and gas resources assessment is more and more obvious. A group of oil and gas reservoirs with genetic connection in oil and gas systems have the inherent relationship between the sequences of reserves. Based on this, the degree of hydrocarbon accumulation is defined (a group of genetically linked reservoirs in the same oil and gas system, After sorting, the sum of the reserves of the first few reservoirs, as a percentage of the total reserves of all the reservoirs. The application of this characteristic parameter can describe the non-uniform accumulation of oil and gas in the petroleum system, and can dynamically analyze its theoretical degree of aggregation and predict the final degree of hydrocarbon accumulation. The Zipf model describing the sequence structure of oil and gas reservoirs has been improved. The modified Zipf model is proposed to calculate the theoretical aggregate degree of oil and gas pools. This modified model is used to fit the sequence of the Triassic reservoir reserves discovered in the Lunnan-Silurian area of Tarim Basin up to the end of 1995, suggesting that the oil and gas accumulation in this region is moderate. Figure 1 Senate 9 (Wang Xiaoling pick)