东北石油大学学报2026，Vol.50Issue(2)：36-48,13.DOI:10.3969/j.issn.2095-4107.2026.02.003
准噶尔盆地中拐凸起南部佳木河组储层发育特征及演化序列
Reservoir developmet characteristics and evolution sequences of Jiamuhe Formation in the south of Zhong-guai Uplift,Junggar Basin
摘要
Abstract
The Lower Permian Jiamuhe Formation in the south of Zhongguai Uplift is an important pe-troleum exploration hotspot of the deep-ultra-deep tight sandstone(conglomerate)in the northwestern margin of Junggar Basin.The reservoir petrology,reservoir physical properties and reservoir space de-velopment characteristics are characterized by using core thin section,high pressure mercury injection,SEM and core three-dimensional CT scanning,and reservoir control factors and evolution process are discussed.The results show that:the reservoir lithology in the study area is dense conglomerate rich in laumontite cement,which has the characteristics of medium-high porosity and low permeability.The reservoir space is dominated by late dissolution pores.The pore throat coordination number and the pore connectivity are bad.Fan delta front is the main facies belt of reservoir development.Compaction and cementation lead to reservoir densification.The dissolution of laumontite is the main internal factor of tight reservoir accumulation.The tectonic effects such as faults and unconformities affect the elimina-ting densification process of reservoirs by enhancing the breadth and depth of dissolution.Affected by tectonic uplift leaching and source rock evolution,the reservoir was modified by three stages of dissolu-tion:weak acid water on the surface,organic acid in the early stage of hydrocarbon expulsion and partial pressure rise of CO2 with crude oil cracking in the over-mature stage.Among them,the leaching of weak acid water on the surface is the main reason for reservoir eliminating densification.The results provide a reference for the exploration and development of the study area and the same type of reservoir.关键词
准噶尔盆地/中拐凸起/佳木河组/储层/发育特征/浊沸石/演化序列Key words
Junggar Basin/Zhongguai Uplift/Jiamuhe Formation/reservoir/development characteris-tics/laumontite/evolution sequence分类
能源科技引用本文复制引用
李啸,刘荷冲,闫文琦,牛伟,江祖强,杨帆,王仕莉..准噶尔盆地中拐凸起南部佳木河组储层发育特征及演化序列[J].东北石油大学学报,2026,50(2):36-48,13.基金项目
中国石油天然气股份有限公司科技攻关项目(2023ZZ24YJ01) （2023ZZ24YJ01）
