顺北地区流体活动对储层形成的控制作用  

Controlling effects of fluid activity on reservoir formation in Shunbei area

作　　者：王玉伟 陈红汉[3] 曹自成[4] 云露[4] WANG Yuwei;CHEN Honghan;CAO Zicheng;YUN Lu(Post-doctoral Research Station,Shengli Petroleum Administration Bureau,Dongying 257000,China;Xianhe Oil Production Plant,Shengli Oilfield Company,SINOPEC,Dongying 257068,China;School of Earth Resources,China University of Geosceiences,Wuhan 430074,China;Northwest Oilfield Company,SINOPEC,Urumqi 830011,China)

机构地区：[1]胜利石油管理局博士后科研工作站,山东东营257000 [2]中国石化胜利油田分公司现河采油厂,山东东营257068 [3]中国地质大学(武汉)资源学院,湖北武汉430074 [4]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《断块油气田》2023年第1期44-51,共8页Fault-Block Oil & Gas Field

基　　金：中国石化西北油田分公司勘探开发研究院协作项目“顺北地区奥陶系微区烃类地球化学与成藏期次研究”(KY2016-S-034);胜利石油管理局博士后科研课题“东营凹陷南斜坡东段孔店组油气来源及成藏过程研究”(YKB2011)。

摘　　要：近年来顺北地区油气勘探取得重大突破。根据岩心观察、成像测井等资料,顺北地区奥陶系储层主要发育断溶体,储集空间以构造裂缝为主,并伴有溶蚀孔洞的发育。其中,裂缝以单一高角度斜交裂缝和平行裂缝为主,裂缝宽度和孔隙度都不高,主要发育微细裂缝。利用流体包裹体测试、碳氧同位素分析对流体性质进行研究,结果表明,作用于顺北地区奥陶系储层的流体主要有5幕,存在3种流体端元,分别是大气淡水、上升热液流体以及同生海水与2种热液流体的混合流体。结合地震资料分析,5幕流体主要经历了2种流体-岩石相互作用体制:大气淡水-同生海水重力流演化和深部上升热液作用,而断溶体的形成正是在走滑断裂构造活动的基础上,早成岩岩溶作用叠加深成岩岩溶作用的结果。In recent years,great breakthoughs has been made in oil and gas exploration in Shunbei area.Based on the analysis of core observation and imaging logging,it is believed that the Ordovician reservoirs in Shunbei area are mainly developed fault-karst reservoirs,and the reservoir space is dominated by structural fractures,accompanied by the development of dissolved pores and caves.Among them,the fractures are mainly single high-angle oblique fractures and parallel fractures,the width and porosity of the fractures are not high,and the micro-fractures are mainly developed.Using fluid inclusion system testing and carbon and oxygen isotopes to analyze the fluid property,the results show that there are five episodes of fluids acting on Ordovician reservoirs in the Shunbei area,and there are three types of fluid,namely meteoric water,upwelling hydrothermal fluids and mixed fluids of syngenetic seawater and these two hydrothermal fluids.Combined with seismic data analysis,five episodes of fluids mainly experienced two fluid-rock interaction systems:the evolution system of meteoric water-syngenetic seawater gravity flow and the deep upwelling hydrotherm activities.The formation of fault-karst reservoirs is the result of eogenetic karstification superimposed on plutonic karstification,based on the tectonic activities of strike-slip faults.

关 键 词：断溶体 储层形成机制 流体来源 奥陶系 顺北地区 

分 类 号：TE122[石油与天然气工程—油气勘探]