摘要
为了更精准地研究鄂尔多斯盆地西南部华庆地区上三叠统延长组长6_2-6_3油层组储层特征,运用岩心照片、测井数据、粒度分析、录井数据等资料,对延长组长6_2-6_3油层组的岩性、碎屑颗粒、构造、测井响应、生物标志以及接触关系进行了分析研究。分析了长6油层组沉积微相特征,识别出该沉积时期半深湖-深湖亚相和三角洲前缘亚相两类沉积亚相,半深湖泥、浊积岩、砂质碎屑流砂体、水下分流河道、分流间湾和席状砂6类沉积微相,并分析华庆地区延长组长6_2-6_3期沉积相发育演化过程。沉积微相精细化描述揭示了华庆地区延长组6段油层组沉积环境,为精细化勘探开发提供地质依据。
A detailed study is conducted,on the basis of core examination,grain-size analysis and well logs,to the lithology,grain size,sedimentary structure,well logging response,biomarker and contact relation of the Chang-62 to Chang-63 oil reservoirs of the Yanchang Formation in the Huachi-Qingyang region,Ordos Basin.The sedimentary facies in the study area may be classified into two sedimentary subfacies including the semi-deep lake to deep lake and delta front subfacies,and six sedimentary microfacies including the semi-deep lake mud,turbidite,sandy debris flow,subaqueous distributary channel,interdistributary bay and sheet sand microfacies.During the deposition of the Chang-63 oil reservoirs of the Upper Triassic Yanchang Formation,the shallow-lake delta front deposits were well developed in the semi-deep to deep lake sedimentary environments in the northeastern and southwestern parts of the study area,where the sandy debris flow deposits may provide excellent sites for the oil-gas accumulation in the deep lake area.The results of research in this study may be significant to the exploration and development of the Chang-6 oil reservoirs as the key exploration horizons of the Upper Triassic Yanchang Formation in the Huachi-Qingyang region.
作者
李璟
傅强
邓秀琴
黄健玲
李祥同
LI Jing;Fu Qiang;DENG Xiu-qin;HUANG Jian-ling;LI Xiang-tong(State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,China;Research Institute of Petroleum Exploration and Development,Changqing Oil Field Company,CNPC,Xi'an 710018,Shaanxi,China;Dongsheng Company Shengli Oilfield of SINOPEC,Dongying 257001,Shandong,China)
出处
《沉积与特提斯地质》
CAS
CSCD
2018年第4期68-75,共8页
Sedimentary Geology and Tethyan Geology
基金
国家科技重大专项(2016ZX05050)和(2017ZX050001002)资助
关键词
鄂尔多斯盆地
华庆地区
沉积微相
精细化
延长组
Ordos Basin
Huachi-Qingyang region
sedimentary microfacies
refinement
Upper Triassic Yanchang Formation
