第24卷第6期 2010年12月
现代地质 GEOSCIENCE
苏北盆地高邮凹陷现今地温场特征
李亚军，李儒峰
（中国石油大学盆地与油藏研究中心，北京102249）
VoL24No.6 Dec.2010
摘要：高邮凹陷作为苏北盆地油气资源最丰富的凹陷之一，其地温场特征尚未进行系统研究。通过凹陷内16口系统测温井和53口试油探井的温度资料，计算、分析并得出了凹陷主要层组底界温度和地温梯度的平面特征。地温随深度的增加而增大，从E,s到K,t地温有规律地增高；定深温度由深凹向斜坡呈现出由低到高的变化趋势，同一层组底界温度均表现出深凹带高于斜坡带、北斜坡东高于北斜坡西的特点；温度出现“凹高坡低的现象与埋深关系密切，深度是决定地层温度分布的主要因素，凹陷内温度总体变化正常。E,s-E,d地温梯度为23.0~30.2℃/km，E-K,t为28.9~36.3 ℃/km，Ef-K,t地温梯度高于E,s-E,d，分析为EF和K,t3套烃源层（Ef、EJ、K,t）泥岩含量高，其岩石热导率低，致使Ef-K，t的地温梯度高。高邮凹陷从E,s到K,t均有油气藏分布，总体上油气藏均分布在温度大于60℃区域，
个别油气藏分布在小于60℃区域，主要受到汉留和真2等断层的影响，使侧向运移加大，油气运移到浅部所致。关键词：高邮凹陷；地温场；地温梯度；油气藏
中图分类号：TE121.3
文献标志码：A
文章编号：10008527(2010)06104206
CharacteristicsofPresent-dayGeothermalFieldofGaoyouSag
in Subei Basin LI Ya-jun, LI Ru-feng
(Basin and Resenoir Research Center, China Unitersily of Peroleum, Bejing102249, China)
Abstract: Gaoyou sag is one of the sags with the most abundant oil and gas resources in Subei basin, but the characteristics of geothermal field of this sag have not been researched. According to the temperature data of 16 temperature wells and 53 test wells in Gaoyou sag, the temperature distribution of the main layer groups and the geothermal gradient distribution were analyzed. The result showed that temperature generally increased with depth increasing and also increased from Es to K,t. The slope inhabited the higher temperature than the deep sag.In the same layer the temperature of the deep sag was higher than that of the slope; the temperature of the east part of slope was higher than that of the west.The phenomenon that the higher temperature in the deep sag and lower in the slope showed close relationship between temperature and depth. The buried depth was the main influence factor for the temperature. The geothermal gradient of E,s -E,d was between 23 °C/km and 30. 2 °C/ km, and that of E,f K,t was between 28. 9 C/km and 36. 3 °C/km. The geothermal gradient of E,f K,t was higher than and that of E,s E,d。 The higher geothermal gradient of Ef K,t caused by the high content of low thermal-conductivity mudstones in three sets of hydrocarbon source bed (Ef, E,f, and K,t). The oil and gas reservoirs distributed from E,s to K,t in Gaoyou sag. The oil and gas reservoirs overall distributed in the re-gion with the temperature more than 60 °C , and individual reservoir distributed in the region with the tempera-ture less than 60 °C. The faults of Hanliu and Zhen 2 were the main pathway leading to oil and gas migration in-to the upper strata.
Key words: Gaoyou sag; geothermal field;geothermal gradient; oil and gas reservoir
收稿日期：2010-07-10；改回日期：2010-11-10；责任编辑：潘令枝。
基金项目：中国石油化工股份有限公司江苏油田基研究项日（C0716-08-2S-0007)。
作者简介：李亚军，男，硕土研究生，1983年出生，矿物学、岩石学、矿床学专业，主要研究储层地质学与沉积盆地流体矿
产。Email；liysjun0416@163.com。