摘要
为探究卡塔克隆起良里塔格组台缘带不同段储层类型及形成原因,利用薄片、岩芯、成像测井、地震等资料分析了台缘相带沉积储层特征差异及其主控因素。结果表明,良里塔格组中高能礁滩相带沿1号断裂带呈条状分布,台缘带由东向西呈现差异沉积,可划分为断控型窄陡、沉积型陡坡、沉积型宽缓3种镶边台地台缘相带,与之对应形成裂缝-孔洞型、裂缝-孔洞型和孔洞型、低渗透裂缝型3种储层类型;准同生岩溶作用、浅埋藏淡水溶蚀作用、构造破坏作用3类建设性成岩作用,在台缘带不同位置对储层形成的贡献度存在差异;断控型窄陡镶边台地储层形成的主控因素为礁滩叠置体、岩溶期断裂与晚期断层活动,沉积型陡坡镶边台地为礁滩叠置体与北东向走滑断裂,沉积型宽缓镶边台地为岩溶期断裂活动与晚期走滑断裂。该研究成果将为海相碳酸盐岩勘探提供参考依据。
In order to study the different types and formation causes of reservoirs in the marginal zone of the Lianglitage Formation in the Katake Uplift,this study analyzed the marginal zone sedimentary reservoir characteristics,and their main controlling factors by utilizing a plethora of data sources including thin sections,core samples,FMI logging,and seismic data.The results show that the high-energy reefflat facies of the Lianglitage Formation are distributed in a strip along the No.1 fault zone,exhibiting perplexing distribution patterns.The marginal zone also displays varying sedimentation patterns from east to west,which can be divided into three types of margin facies:fault-controlled narrow and steep,sedimentary steep slope,and sedimentary wide-gentle.Corresponding to these are three types of reservoirs:fracture-pore type,fracture-pore and pore type,and low-permeability fracture type.There are differences in the contribution of three constructive diagenetic processes,including quasi-syngenetic karstification,shallow-burial fresh water dissolution,and structural damage,to the formation of reservoirs in different locations of the marginal zone.The main controlling factors for the formation of the fault-controlled narrow and steep margin facies reef-flat superimposed bodies,karstification period faults,and late-stage fault activity.The sedimentary steep slope margin facies are found to be reef-flat superimposed bodies and northeast-trending strike-slip faults.The sedimentary wide-gentle margin facies are found to be karstification period fault activity and late-stage strike-slip faults.These results offer evidences for the exploration of marine carbonate reservoirs.
作者
沙旭光
姜忠正
李玉兰
孙志朋
Sha Xuguang;Jiang Zhongzheng;Li Yulan;Sun Zhipeng(Exploration and Development Research Institute,Northwest Oilfield Branch,SINOPEC,Urumqi Xinjiang,830011,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)
出处
《矿业科学学报》
CSCD
2023年第5期600-612,共13页
Journal of Mining Science and Technology
基金
中石化西北油田分公司勘探开发研究院科研项目(KY2020-S-033)。
关键词
卡塔克隆起
良里塔格组
沉积特征
储层成因
主控因素
Katake Uplift
Lianglitage Formation
sedimentary characteristics
reservoir genesis
main control factors
