东濮凹陷濮城下第三系含油气系统运聚系数研究

STUDY ON THE ACCUMULATION FACTOR OF THE PETROLEUM SYSTEM OF THE LOWER TERTIARY IN THE PUCHENG AREA, DONGPU DEPRESSION

任来义 王运所 许化政 张玉体 邓君

Ren Laiyi Wang Yunsuo Xu Huazheng Zhang Yuti Dengjun

石油大学地球资源与信息学院, 山东, 东营, 257061 2. 中原油田分公司勘探开发科学研究院, 河南, 濮阳, 457001

University of Petroleum, Dongyiny, Shandong 257061, China 2. Institute of Petroleum Exploration and Development, Zhongyuan Oil Field Branch, SINOPEC, Puyang, Henan 457001, China

一个含油气系统的油气运聚系数是指其油气聚集量(或资源量)与生烃量之比,它是油气资源评价的关键参数之一.东濮凹陷濮城下第三系含油气系统为勘探程度高、地质认识程度高及油气资源探明程度高的地质单元,是一个洼中隆构造.其供烃边界分布清楚,对油气藏特征、成藏条件、及成藏历史认识深刻,可视为一个由油气运移分割槽所围限的、具有相似油气运移特征的,独立和完整的油气运聚单元.油气运聚系数研究是评价各地质要素对油气运聚效果的综合影响,用盆地模拟方法计算出最大生烃灶的有效烃源岩的生烃量,然后以现今已经聚集的探明油气地质储量为基础,利用油藏规模序列法及翁氏旋回法预测出最终可探明的油气地质储量,近而反算出该含油气系统的油、气运聚系数分别为12.9%～15.6%(油)和0.905%(气),该结果对地质条件相似地区的油气运聚系数研究及选取具有参考意义.

The accumulation factor of a petroleum system is the ratio between the amount of the oil and gas accumulated (resource)and the hydrocarbon-generating,and it's the key parameter to evaluation for the oil and gas resources.The Pucheng area is a high-in-sag structural geological unit,in which the exploration degree is high,the geological knowledge is known well,the proven degree for the resource is high as well.It has a clear boundary to supply the oil and gas.The character of the oil and gas reservoir,the formation conditions and the hydrocarbon accumulation history are known well.This system can be thought as a independent and integrated oil and gas accumulation unit surrounded by the separated grooves with the similar characteristics of oil and gas migration.The research on this accumulation factor can be effective to the evaluation for each geological factor.In this paper the basin-modeling method is used to calculate the amount of hydrocarbon from the effective source rocks in the biggest source kitchen,then based on the preven reserves,use the oil reservoir order method and the Wong's circle method to calculate the final proven reserves,in turn to calculate reversely the accumulation factors of this system:the value is 12.9%～15.6% for oil and 0.905% for gas.The result is significant to the research on the oil and gas accumulation factors for the exploration area that has similar geology conditions.

https://doi.org/10.11781/sysydz200503245