松辽盆地王府地区泉四段常规、非常规油气有序分布及成藏主控因素  

Main Controlling Factors and Distribution of Conventional and Unconventional Oil Within the 4 th Member of Quantou Formation in Wangfu Area,Songliao Basin

作　　者：张熠 刘萍[2] 周翔[1] Zhang Yi;Liu Ping;Zhou Xiang(Exploration and Production Research Institute,Daqing Oilfield Limited Company,Daqing 163712,Heilongjiang,China;The Fifth Oil Production Plant,Daqing Oilfield Limited Company,Daqing 163513,Heilongjiang,China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]大庆油田有限责任公司第五采油厂,黑龙江大庆163513

出　　处：《吉林大学学报(地球科学版)》2025年第1期46-56,共11页Journal of Jilin University:Earth Science Edition

基　　金：国家科技重大专项(2017ZX05071)。

摘　　要：为了探讨松辽盆地王府地区泉四段油气富集规律和有利勘探方向,综合地震、地质、地化和生产测试等多种资料,在王府地区常规、非常规油气分类和分布研究基础上,明确各类油藏的主控因素,建立其差异性的成藏模式。结果表明:王府地区发育常规低渗透砂岩油和非常规致密油2种类型的油藏,平面上二者呈有序性分布。泉四段油气成藏受烃源岩、构造、断层和优质储层联合控制,强排烃泥岩作为低渗透油藏物质基础控制其宏观分布,生烃增压是凹陷内致密油充注的主要动力,限制了致密油分布范围;大规模排烃前构造基本定型,北部低势区是低渗透砂岩油气运移指向区;明水组末期开启的NW向断层是低渗透油藏侧向运聚和致密油垂向运聚的良好通道;相对优质储层是控制致密油富集和低渗透砂岩油藏高产的重要因素。建立了三站背斜低渗透砂岩“势差驱动、近源侧向输导、古高点聚集”、莺山西构造群低渗透砂岩“源储对接、超压+浮力接替驱动、断砂联合输导”、王府凹陷致密油“超压驱动、源内垂向下排、局部甜点富集”和莺山东构造群致密油“超压+浮力联合驱动、远源砂体侧向输导、甜点储层聚集”等4种成藏模式。In order to ensure the hydrocarbon enrichment regularities and favorable exploration direction within the 4 th Member of Quantou Formation in Wangfu area,seismic,geological,geochemistry,and testing data are used to analyze the main controlling factors and hydrocarbon accumulation mode of conventional and unconventional oil on the basis of reservoir classification and its distribution.There are two kinds of reservoirs in Wangfu area,conventional low-permeability reservoir and unconventional tight oil,and they are in order distribution.The hydrocarbon accumulations in the 4^(th)Member of Quantou Formation are controlled by source rock,structure,fault,and reservoir.The distribution of low-permeability reservoir is controlled by strong hydrocarbon expulsion mudstone,while residual pressure is the main power for tight oil.The structure of the 4^(th)Member of Quantou Formation is almost complete before the hydrocarbon expulsion,and north uplift with a low fluid potential is the target area for low-permeability reservoir migration.The open faults in NW direction are favorable channels for low-permeability reservoir migration in lateral and tight oil in vertical.Relatively high reservoir quality is the key factor of tight oil accumulation and low-permeability reservoir productivity.We recognized four kinds of accumulation modes in Wangfu area,such as“overpressure drive,vertical migration and enrichment in sweet points”within the deep depression,“fluid potential drive,lateral migration along the open fault and assemble in ancient culmination”among north uplift,“reservoir and source butt to butt,overpressure and fluid potential relay drive,fault and sandstone migrate together”in west steep slope,and“overpressure and fluid potential drive,sandstone migration and enrichment in sweet points”around gentle slope in the east.

关 键 词：低渗透砂岩油藏 致密油 成藏控制因素 泉四段 王府地区 松辽盆地 

分 类 号：P618.13[天文地球—矿床学] TE12[天文地球—地质学]