油气成藏期断裂封闭部位确定方法及其应用  

Determination of Fault Sealing Position during Oil and Gas Accumulation and Its Application

作　　者：付君豪 陈再贺 刘萍[2] 付宪 李云峰[2] 赵政权[2] 胡慧婷[3] FU Junhao;CHEN Zaihe;LIU Ping;FU Xian;LI Yunfeng;ZHAO Zhengquan;HU Huiting(College of Resources and Environment,Yangtze University,Wuhan Hubei 430100;Huabei Oilfield No.5 Oil Production Factory,Xinji Hebei 052360;Northeast Petroleum University,School of Earth Sciences,Daqing Heilongjiang 163318)

机构地区：[1]长江大学资源与环境学院,湖北武汉430100 [2]华北油田第五采油厂,河北辛集052360 [3]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《中国科技纵横》2022年第23期17-20,共4页China Science & Technology Overview

摘　　要：为了研究含油气盆地断裂附近油气分布规律,在油气成藏期断裂垂向和侧向封闭油气机理及所需条件研究的基础上,通过确定油气成藏期泥岩盖层古断接厚度和断裂在泥岩盖层内分段生长上下连接所需的最大断接厚度,确定油气成藏期断裂垂向封闭部位;通过确定断裂填充物泥质含量和断裂封油气所需的最小填充物泥质含量,确定油气成藏期断裂侧向封闭部位,二者综合建立了一套油气成藏期断裂封闭部位确定方法,并将其应用于渤海湾盆地歧口凹陷油气成藏期——明化镇组沉积中晚期南大港断裂在东三段内封闭部位的确定中,结果表明:油气成藏期——明化镇组沉积中晚期南大港断裂在东三段内封闭部位主要分布在其西部,少量分布在其中部和东部局部,有利于下伏沙三段源岩生成油气在南大港断裂附近东三段内聚集与保存,与目前南大港断裂附近东三段已发现油气分布相吻合,表明该方法用于确定油气成藏期断裂封闭部位是可行的。To realize oil and gas distribution survey near faults in petroliferous basins,based on the study of vertical and lateral sealing oil and gas mechanism and required conditions of faults during oil and gas accumulation,the vertical sealing position of faults during oil and gas accumulation is determined by determining the ancient fault thickness of mudstone caprock during oil and gas accumulation and the Maximum fault thickness of segmented growth and up and down connection of sludge surface;By determining the argillaceous content of fault filling and the minimum argillaceous content of fault filling to seal oil and gas,the lateral sealing position of fault in oil and gas accumulation period is determined,and a set of method for determining the sealing position of fault in oil and gas accumulation period is comprehensively established.It is applied to determine the sealed position of Nandagang fault in the Ed3 section during hydrocarbon accumulation is mainly distributed in the west,and a small amount is distributed in the central and eastern part of the region,which is conducive to the accumulation and preservation of oil and gas generated by underlying source rock of the Es3 section in the Ed3 section.It is consistent with the oil and gas distribution in the western,central and eastern part of the region found in the Ed3 section near the Nandagang fault,indicating that this method is feasible to determin the sealed postion of the fault in the hydrocarbon accumulation period.

关 键 词：油气成藏期 断裂垂向封闭部位 断裂侧向封闭部位 确定方法 

分 类 号：TE122.2[石油与天然气工程—油气勘探]