特种油气藏2023，Vol.30Issue(6)：92-98,7.DOI:10.3969/j.issn.1006-6535.2023.06.012
砂体油气输导优势路径分布预测方法及其应用
Prediction Method for the Distribution of Dominant Paths for Oil and Gas Transmission in Sand Bodies and Its Application
摘要
Abstract
In order to clarify the oil and gas distribution law of P Ⅰ 1-1 sub-bed of Putaohua Reservoir in Bayantsa-gaan Area of northern Songliao Basin,on the basis of the research on the conditions of oil and gas transport in sand bodies and the formation mechanism of the dominant paths,the main dominant path for oil and gas transport in the sand body is determined by the distribution of sand body pore-connected distribution zones and the distribution of paleotectonic ridges on the top surface of the layer where the sand body is located;based on the sand body pore-connected distribution zone and the distribution of dominant-phase sand bodies,the subdominant paths for oil and gas transport in sand bodies are determined,thus forming a method for predicting the distribution of dominant paths for oil and gas transport in sand bodies in oil and gas-bearing basins with undeveloped fractures.The study results show that the dominant paths for oil and gas transport in sand bodies are affected by the connectivity of sand bodies and the difference in potential energy of oil and gas.Five main dominant paths for oil and gas transport in sand bodies have been developed in the P Ⅰ 1-1 sub-bed of Putaohua Reservoir in Bayantsagaan Area,and there is one relatively large-scale north-south oriented main dominant path for oil and gas transport in sand bodies in the center and east of the area;and there are two subdominant paths for oil and gas transport in sand bodies in the northern and southeastern parts of the area.The two relatively large-scale main dominant paths for oil and gas transport in sand bodies are conducive to the accumulation of hydrocarbons from the source rocks of the underlying Qingshankou Formation within the P Ⅰ 1-1 sub-bed,which is consistent with the distribution of hydrocarbons discovered so far,indicating that this method is feasible for predicting dominant paths for oil and gas transport in sand bodies.Accu-rately predicting the advantageous pathways of oil and gas transmission in sand bodies at different levels is of great significance for clarifying the distribution patterns,it will guide oil and gas exploration.关键词
油气输导/优势路径/油气成藏/巴彦查干地区/松辽盆地Key words
oil and gas transport/dominant path/oil and gas accumulation/Bayantsagaan Area/Songliao Basin分类
能源科技引用本文复制引用
高微..砂体油气输导优势路径分布预测方法及其应用[J].特种油气藏,2023,30(6):92-98,7.基金项目
国家自然科学基金"断砂配置侧向分流运聚油气机理及有利部位识别研究"(42072157) （42072157）
