摘要
为了深化对雄安新区中深层地热资源的规模化开发利用,以露头、岩心、薄片、钻井资料与地震测线解释成果为基础,分析雄安新区中元古界蓟县系雾迷山组热储岩石学和储集空间特征,研究了雾迷山组热储沉积相模式、岩相古地理和孔隙度、渗透率分布特征;结合构造演化和热储成岩作用类型,分析雾迷山组热储岩溶发育期次、岩溶作用、岩溶古地貌分布特征,针对岩溶主要发育层,厘清控制因素,明确雄安新区雾迷山组岩溶热储特征;综合上述特征,结合雄安新区地温梯度、断裂分布及水动力等因素,优选出该区雾迷山组岩溶热储有利勘探靶区。研究结果表明:雄安新区蓟县系雾迷山组热储有利岩性主要为叠层石白云岩、藻凝块白云岩、颗粒白云岩,藻云坪微相、滩微相易发育各类溶蚀作用,云坪易发育裂缝,储集空间类型为孔隙、溶洞和裂缝3大系统。岩溶作用类型可分为同生—准同生岩溶、表生岩溶和埋藏岩溶,自雾迷山组沉积后主要发育于芹峪期、印支期和燕山期的表生岩溶和晚喜山期的埋藏溶蚀,对雾迷山组储层有着建设性作用,燕山—早喜马拉雅期对岩溶热储的形成演化起决定作用;同期主要伴随3期高角度裂缝发育,这些高角度缝增加了储集空间与输导体系,促进期后的相关溶蚀作用;裂缝在白云岩中最发育,灰质云岩次之,泥质云岩最不发育。孔隙度和渗透率区域上分布有3个高值区。岩溶古地貌在印支期前北低南高,在印支期及以后,地貌北高南低,北部岩溶作用强烈,南部次高地也发育岩溶带。溶蚀相为最有利的成岩相区,溶蚀—泥质充填相为较有利的成岩相区。研究区雾迷山组岩溶储集层分布主要受岩性(包括组分、结构、厚度)、成岩相带、构造(包括断裂、裂缝、不整合面)和古地貌等方面因素的控制,地热勘探最有利靶区位于大王镇西部及南部�
In order to deepen the large-scale development and utilization of geothermal resources in the medium-deep depth of Xiong´an New Area,based on outcrop,core,rock thin sections,drilling data and seismic lines interpretation results,the characteristics of thermal reservoir petrology and reservoir space are analyzed,and the thermal reservoir sedimentary facies model,lithofacies palaeogeography,porosity and permeability distribution characteristics of Wumishan Formation of Jixian System of Mesoproterozoic in Xiong´an New Area are studied.Combined with tectonic evolution and types of thermal reservoir diagenesis,the development stages,karstification and distribution characteristics of karst palaeogeomorphology of Wumishan Formation thermal reservoir are analyzed.According to the main karst development layers,the controlling factors are clarified,and the characteristics of karst thermal reservoir of Wumishan Formation in Xiong´an New Area are defined.With consideration of the above which with geothermal gradient,fault distribution and hydrodynamic factors,the favorable exploration target area for Wumishan Formation karst thermal reservoir is selected in Xiong´an New Area.The research results show that the favorable lithology for thermal storage of Wumishan Formation of Jixian System in Xiong´an New Area is mainly stromatolite dolomite,algae clot dolomite and granular dolomite,algae-dolomite tidal flat microfacies and grain beach microfacies are liable to develop various kinds of dissolution,the dolomite tidal flat microfacies is liable to develop fractures,and the reservoir space types are pore,cave and fracture systems.The types of karstification can be divided into syngenetic-quasi-syngenetic karst,supergene karst and buried karst.Since Wumishan Formation was deposited,it mainly developed in Qinyuian,Indosinian and Yanshanian supergene karst and buried karst in Late Himalayan,which played a constructive role in Wumishan Formation reservoir.The formation and evolution of karst thermal reservoir are decisively contr
作者
戴明刚
马鹏鹏
雷海飞
胡甲国
郭新锋
张家云
鲍志东
Dai Minggang;Ma Pengpeng;Lei Haifei;Hu Jiaguo;Guo Xinfeng;Zhang Jiayun;Bao Zhidong(Sinopec Star Petroleum Corporation Limited,Beijing100083;China National Center for Geothermal Energy Development Research and Applied Technology Promotion,Beijing100083;Sinopec Green Energy Geothermal Development Co.,Ltd.,Xiong´an,Hebei071800;China University of Petroleum(Beijing),Beijing102249)
出处
《地质科学》
CAS
CSCD
北大核心
2020年第2期487-505,共19页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家重点研发计划“深地资源勘查开采”专项项目(编号:2018YFC0604300)
中国石化集团公司科技项目(编号:JP17010)资助。
关键词
雄安新区
雾迷山组
岩溶热储
岩溶作用
成岩相带
古地貌
控制因素
勘探有利区
Xiong´an New Area
Wumishan Formation
Karst thermal reservoir
Karstification
Diagenetic facies zone
Palaeogeomorphology
Controlling factors
Favorable exploration areas
