鄂尔多斯Q地区长8段成岩作用及储层致密化研究

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中图分类号：TE122 文献标识码：A 文章编号：2097-5465（2025）04-0055-08

1.Shaanxi College of Communications Technology，Xi'an 710018，China；2.PetroChina Changqing Oilfield

Company，Xi'an710016，China；3.Sinopec Research Instituteof Petroleum Engineering，ShelfoilPetroleum

Equipment&ServicesCo，Ltd.，Dezhou253oo0，China

Abstract：Byusinggeologicaldatasuchascore，casting thinsectionandscannng electronmicroscope，diagenesisand densificationofreservoirinthestudyareaareanalyzed，thentheporeevolutionisquantitativelyanalyzed，andthecausesof reservoirdensificationarediscussed.Theresultsshows that：lithicarkoseandfeldsparlithicsandstonearemainlydevelopedinthe studyarea，intergaularporesareelativelydevelopdfolowedbyfeldspardissedpores.Thereservoirexperencedariesof diagenesissuchascompaction，cementationanddisolution.Thephysical propertyofunderwaterdistributarychannelmicrofacies reservoirarethebestandthatof distributarybaymicrofaciesreservoiristheworst.Thecontentofdiageneticmineralsalsohasa certainimpactonthequalityofreservoir.Thehigherthecontentofrigidminerals，thebetterthephysicalpropertiesofservoir. The average primary porosity of the reservoir in the study area is 41.7% ，the average pore reduction of compaction is 23.38% ，the average pore reduction of cementation is 12.56% ，and the average pore increase of dissolution is 2，82% .Cementation is the main reason for pore densification，and dissolution is the main factor for reservoir improvement.

Keywords：Chang8；reservoir characteristic；diagenesis；poreevolution；causesof reservoirdensification

来稿日期：2025-01-03 DOI：10.13937/j.cnki.hbdzdxxb.2025.04.007

基金项目：陕西省教育厅科学研究计划项目（23JK0336）；陕西交通职业技术学院校级课题（YJ23005）；陕西省自然科学基础研究计划（2024JC-YBQN-0609）；陕西省“十四五"教育科学规划 2024年度课题（SGH24Y3191）作者简介：徐欣（1994—），女，湖北荆门人，讲师，主要从事油气储层地质研究、油气田开发工作；e-mail：xuxin50215261@163.com

通信作者：马锦明（1986一），男，湖北荆门人，工程师，主要从事油气开发、固完井相关研究。（剩余8224字）