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地质科学  2020, Vol. 55 Issue (2): 487-505    DOI: 10.12017/dzkx.2020.031
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雄安新区雾迷山组岩溶热储特征与有利区
戴明刚1,2    马鹏鹏1,2    雷海飞3    胡甲国1,2    郭新锋1,2    张家云1,2    鲍志东4
  1. 中国石化集团新星石油有限责任公司  北京    100083
  2. 国家地热能源开发利用研究及应用技术推广中心  北京    100083
  3. 中石化绿源地热能开发有限公司  河北雄安     071800
  4. 中国石油大学(北京)  北京    102249
Distribution characteristics and favorable targets of karst geothermal reservoir of Wumishan Formation in Xiong´an New Area
Dai Minggang1, 2    Ma Pengpeng1, 2    Lei Haifei3    Hu Jiaguo1, 2    Guo Xinfeng1, 2    Zhang Jiayun1, 2    Bao Zhidong4
  1. Sinopec Star Petroleum Corporation Limited, Beijing  100083
  2. China National Center for Geothermal Energy Development Research and Applied Technology Promotion, Beijing  100083
  3. Sinopec Green Energy Geothermal Development Co., Ltd., Xiong´an , Hebei  071800
  4. China University of Petroleum (Beijing), Beijing  102249
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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、容城—八于、雄县—赵北口镇西部、大营镇、高深1井—高阳等区带。

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戴明刚 马鹏鹏 雷海飞 胡甲国 郭新锋 张家云 鲍志东
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     
Abstract

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 controlled by the dissolution in Yanshanian-Early Himalayan Stage.  From Qinyuian to Himalayan Stage, three stages of high-angle fractures were mainly accompanied, which increased the reservoir space and transport system, and promoted the related dissolution after the period. And fractures are the most developed in dolomite, the second in calcareous dolomite, and the least developed in argillaceous dolomite. There are three high value zones in the area of porosity and permeability. The karst palaeogeomorphology was low in the north and high in the south before the Indosinian Stage, high in the north and low in the South after the Indosinian Stage, and strong karstification in the north, and karst belts were also developed in the southern sub-highlands. The dissolution facies is the most favorable diagenetic facies area, and the dissolution-argillaceous filling facies is the more favorable diagenetic facies area. The distribution of Wumishan Formation karst reservoirs in the study area is mainly controlled by lithology (including composition, structure, thickness), diagenetic facies zone, structure (including faults, fractures, unconformities) and palaeogeomorphology. The most favorable targets for geothermal exploration are located in the west and south of Dawang Town, Rongcheng County-Bayu Township, Xiongxian County-Zhaobeikou Town, Daying Town and Gaoshen well 1-Gaoyang zones.

Key wordsXiong´an New Area   Wumishan Formation   Karst thermal reservoir   Karstification   Diagenetic facies zone   Palaeogeomorphology   Controlling factors   Favorable exploration areas   
收稿日期: 2019-10-05; 出版日期: 2020-04-10
基金资助:

国家重点研发计划“深地资源勘查开采”专项项目(编号:2018YFC0604300)和中国石化集团公司科技项目(编号:JP17010)资助

作者简介: 戴明刚, 男, 1977 年生, 博士, 高级工程师, 综合地质地球物理专业。E-mail:397211924@qq.com;daiminggang.xxsy@sinopec.com
引用本文:   
戴明刚 马鹏鹏 雷海飞 胡甲国 郭新锋 张家云 鲍志东. 2020, 雄安新区雾迷山组岩溶热储特征与有利区. 地质科学, 55(2): 487-505.
Dai Minggang Ma Pengpeng Lei Haifei Hu Jiaguo Guo Xinfeng Zhang Jiayun Bao Zhidong. Distribution characteristics and favorable targets of karst geothermal reservoir of Wumishan Formation in Xiong´an New Area[J]. Chinese Journal of Geology, 2020, 55(2): 487-505.
 
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