利用地层原油物性和油层压裂梯度研究陕甘宁盆地侏罗系油气二次运移

A STUDY ON SECONDARY MIGRATION OF PETROLEUM IN JURASSIC SYSTEM OF THE SHAAN-GAN-NING BASIN ON THE BASIS OF CRUDE OIL PROPERTIES AND FRACTURING GRADIENTS IN RESERVOIR

刘孝汉

Liu Xiaohan

中国石油天然气总公司长庆油田勘探开发研究院, 甘肃庆阳

Research Institute of Petroleum Exploration and Development of the Changqing Oil Field, CNPC

甲烷含量与油气比关系曲线可用来区分两种不同的运移方式;此曲线结合其它资科为查明中生界垂向运移提供了一些重要依据;菱形图和P.C.卡西莫夫运移系数可初步确定侏罗系油藏油气侧向运移的方向和距离;压裂梯度结合岩芯资科,可以判断裂缝类型,区分运移方式,进行油(气)藏预测.本文所提供的成果和认识有助于研究侏罗系古地貌油田的形成和分布,并指导侏罗系的勘探.

The ratio curves of methane content to oil/gas can be used to distinguish the two different patterns of migration.The curve together with other available data may provide certain important evidences for the vertical migration in Mesozoic systems;while the direction and distance of lateral petroleum migration in the Jurassic oil pools is preliminarily determined from the rhombic pattern and Kasimov migrating coefficient.Furthermore,the determination of fracture types,the distinguishing of migrating patterns,and the prediction of oil (gas) pools are made on the basis of the data from fractured gradients and cores.Consequently,the results and understanding from the analysis of above-mentioned methods are helpful to study the formation and distribution of oil/gas fields with the paleogeomorphology;therefore,to guide the petroleum exploration in the Jurassic system.

https://doi.org/10.11781/sysydz199104340