渤海湾盆地内黄隆起东斜坡奥陶系岩溶热储地热资源评价  

Geothermal Resource Evaluation of the Ordovician Karst Reservoir in the East Slope of Neihuang Uplift,Bohai Bay Basin

作　　者：章惠 汪新伟[1,2] 周总瑛[1,2] 贺婷婷 刘晓红[1,2] 黄旭 高楠安 ZHANG Hui;WANG Xinwei;ZHOU Zongying;HE Tingting;LIU Xiaohong;HUANG Xu;GAO Nan'an(Star Petroleum Corporation Limited,SINOPEC,Beijing 100083,China;SINOPEC Key Laboratory of Geothermal Resources Exploitation and Utilization,Beijing 100083,China)

机构地区：[1]中国石化集团新星石油有限责任公司,北京100083 [2]中国石化地热资源开发利用重点实验室,北京100083

出　　处：《现代地质》2024年第2期398-408,共11页Geoscience

基　　金：中国石油化工股份有限公司科技项目(KLJP23008)。

摘　　要：渤海湾盆地内黄隆起东斜坡断裂构造发育,地热资源丰富,其奥陶系优质岩溶热储分布与城市供暖匹配良好,开展研究区地热资源精细评价对本区岩溶热储的整体开发具有指导意义。本文基于前人研究成果,综合钻井数据与物探等资料,开展岩溶热储空间展布、地温、物性和水化学方面的研究,建立地热田形成的概念模型,并精细评价地热资源量。结果表明,研究区奥陶系岩溶热储平面上分带,呈北东向展布,热储顶面埋深为800~3000 m,具有核部浅、两侧翼部深的特点;纵向上分层,单井含水层为19~43层,累计含水层厚度26.3~137.2 m,主要分布于奥陶系下马家沟组、上马家沟组和峰峰组,其中峰峰组为主力产水层。热储平均孔隙度为3.52%~15.45%,井口水温48~75℃,单井水量55~160 m~3/h,水化学类型为SO_(4)·Cl-Ca·Na型,矿化度1830~3560 mg/L。利用热储体积法平面上将研究区分为4个评价单元,垂向上分为5个层段,评价出南乐—濮阳段地热资源总量321亿GJ,可采资源量48.2亿GJ,折合标煤1.65亿t,年可采资源量可满足供暖面积5794万m^(2),是目前已开发面积393万m^(2)的近15倍,开发潜力巨大。The eastern slope of Neihuang Uplift develops fault structures and abundant geothermal resources.The distribution of the high-quality karst geothermal reservoir in the Ordovician system matches the demand of urban heating.The refined evaluation of the geothermal resources in the study area will be beneficial to the efficient development and utilization of geothermal resources.In this study,we investigated the karst reservoir distribution,geothermal temperatures,physical properties and hydrochemistry,and the conceptual model of formation of the geothermal field.The amount of geothermal resources was carefully evaluated as well.The results show that(1)the Ordovician karst reservoirs are zoned in the plane and distributed in the northeast direction,with the characteristics of shallow burial in the middle and deep burial in the east and west,and the buried depth of the reservoir is 800-3,000 m.The reservoirs are layered in the longitudinal direction,and single well aquifers can be divided into 19-43 layers,and the accumulative water-bearing thickness is 26.3-137.2 m,mainly been distributed in Lower Majiagou Formation,Upper Majiagou Formation,and Fengfeng Formation,as the main aquifer;(2)the average porosity of the geothermal reservoir is 3.52%-15.45%,and the wellhead water temperature is 48-75℃,and the single well water volume is 55-160 m^(3)/h,and the water chemistry type is SO_(4)·Cl-Ca·Na,and the salinity is 1,830-3,560 mg/L;(3)the geothermal reservoir volume method is used to evaluate the geothermal resources.The total amount of geothermal resources in the Nanle-Puyang section is 32.1 billion GJ,and the recoverable resources are 4.82 billion GJ,which is equivalent to 165 million tons of standard coal.The recoverable resources can satisfy a heating area of 57.94 million square meters.It is nearly fifteen times of the current development area of 3.93 million square meters,with a huge exploitation potential.

关 键 词：内黄隆起 奥陶系 岩溶热储 形成演化 资源评价 

分 类 号：P314.9[天文地球—固体地球物理学]