东濮凹陷现今地温场及地热资源潜力  

Present geothermal field and geothermal resource potential of the Dongpu Sag

作　　者：涂诗棋 左银辉 周勇水[2] 张超[1] TU Shiqi;ZUO Yinhui;ZHOU Yongshui;ZHANG Chao(State Key Laboratory of Oil and Gas Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;Research Institute of Exploration and Development,Zhongyuan Oilfield,SINOPEC,Puyang 457001,China)

机构地区：[1]成都理工大学油气藏地质与开发工程国家重点实验室,四川成都610059 [2]中国石化中原油田分公司勘探开发研究院,河南濮阳457001

出　　处：《断块油气田》2023年第1期100-106,共7页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目“银额盆地构造-热历史与岩石圈热构造演化及其对生烃的控制”(41972144)。

摘　　要：地热资源潜力评价需要精确的现今地温场进行约束。为了更好地明确东濮凹陷地热资源潜力,文中以已有地温场研究成果为基础,利用一维稳态热传导方程计算得到深度0~3000 m和0~5000 m的地温,获取了这2个深度段的地温梯度分布,并指出了东濮凹陷地热勘探有利区。研究结果表明:东濮凹陷深度0~3000 m地温梯度为16.8~55.7℃/km,平均值为33.2°C/km;深度0~5000 m地温梯度为16.0~54.8℃/km,平均值为32.3°C/km。同时,研究区具有隆起带地温梯度较高、凹陷区地温梯度相对较低的特征。东濮凹陷具有丰富的地热资源。其中:深度3000 m处赋存了以中—低温型为主的地热资源;深度3000~5000 m主要赋存了中—高温型地热资源。文中还指出了3类地热勘探有利区:深度3000 m处,位于中央隆起带的徐集断凸为Ⅰ类勘探有利区,桥口断凸和文留断凸评价为Ⅱ类勘探有利区;深度5000 m处,地层温度普遍偏高,中央隆起带南部、西部斜坡带中部以及西部次凹区西南部为Ⅰ类勘探有利区,中央隆起带中部桥口断凸评价为Ⅲ类勘探有利区。The evaluation of geothermal resource potential needs to be constrained by the accurate current geothermal field.In order to better clarify the geothermal resource potential of Dongpu Sag,in this paper the one-dimensional steady-state heat conduction equation is used to calculate the temperatures of 0-3,000 m and 0-5,000 m based on the existing geothermal field research results,the geothermal gradient distribution of 0-3,000 m and 0-5,000 m are obtained,and which points out the favorable areas for geothermal exploration in Dongpu Sag.The results show that the geothermal gradient at 0-3,000 m in the Dongpu Sag is 16.8-55.7℃/km,with an average value of 33.2℃/km;the geothermal gradient of 0-5,000 m is 16.0-54.8℃/km,with an average value of 32.3℃/km.The study area is characterized by high geothermal gradient in the uplift area and relatively low in the sag area.Dongpu Sag is rich in geothermal resources,of which the geothermal resources dominated by medium-low temperature exist at 3,000 m,and there are mainly medium-high temperature geothermal resources in 3,000-5,000 m.Three types of favorable areas for geothermal exploration are pointed out in the paper.At 3,000 m,the Xuji fault convexity located in the central uplift area is a typeⅠexploration area,and the Qiaokou fault convexity and Wenliu fault convexity are evaluated as typeⅡexploration areas;at 5,000 m,the stratigraphic temperature is generally high,and the southern part of the central uplift area,the central of the western slope zone and the southwestern part of the western sub-concave area are typeⅠexploration areas and the Qiaokou fault convexity in the middle of the central uplift area is evaluated as typeⅢexploration area.

关 键 词：地热资源潜力 地温梯度 现今地温场 地热勘探有利区 东濮凹陷 

分 类 号：TE02[石油与天然气工程]