从钻井测温曲线看地下水流方向及油气储藏条件——以川东南地区丁山1井为例  

The reservoir conditions in southeast Sichuan Basin:A study on temperature logging curve of Dingshan 1

作　　者：龚浩[1] 朱传庆[2] 徐明[2] 郭彤楼[3] 袁玉松[4] 卢庆治 胡圣标[2] 

机构地区：[1]天津市地质工程勘察院,天津300191 [2]中国科学院地质与地球物理研究所,北京100029 [3]中国石化勘探南方分公司,成都610041 [4]中国石化石油勘探开发科学研究院,北京100083 [5]斯伦贝谢(中国)有限公司,北京100016

出　　处：《地质科学》2010年第3期853-862,共10页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金项目(编号:40672197和40974048)资助

摘　　要：实测丁山1井测温曲线显示:温度向井底持续升高,井口温度25℃左右,井底温度107.5℃。温度曲线在1 000～3 000 m深度范围内出现"上凸"的扰动现象。现今平均地温梯度纵向上分段明显:三叠系及二叠系地层平均地温梯度为23.94℃/km;志留系和奥陶系地层平均地温梯度较大,为37.27℃/km;寒武系地层平均地温梯度较低,为16.65℃/100m。根据地温梯度分段性特征与地层热导率、地层岩性的相关性分析认为地下流体垂向上升运动造成了温度曲线扰动。进而推断出下奥陶统—中寒武统的地层具有较高的孔隙度和渗透率,而中奥陶统—志留系的地层则具有良好的封堵性,而这种上盖下储的地层组合,对油气成藏较为有利,反映了川东南地区下组合良好的油气储藏条件。The temperature logging curve of Dingshan 1 shows that as the depth goes to higher the temperature rising,the value is 25 ℃ at the top,and 107.5 ℃ at the bottom. The temperature logging curve has an ＂arch＂ at the depth of 1 000 -3 000 m. The observational temperature gradient section can be divided to 3 parts ：its value of the Permian strata is 23.94℃/kin,and its value of Silurian and Ordovician is 37.27 ℃/kin, while the temperature gradient is very low,the value is 16.65 ℃/km. According to the characteristic of geothermal gradient section and its relationships and pertinences with the thermal conductivities and lithology of the stratum, we reach a conclusion that the vertical motion of subsurface fluid caused the perturbation of the temperature curve. This conclusion is adopted to deduce the strata of Cambrian have high porosity and permeability, while the strata of Silurian-Ordovician have a high sealing capacity, and this assembly of strata is propitious to the hydrocarbon＇s accumulation. It may be an indication of that there is a potential of the ＇Lower Assemblage＇ in south-east Sichuan Basin.

关 键 词：测温曲线 地温梯度储藏条件 丁山1井 川东南 

分 类 号：TE122[石油与天然气工程—油气勘探]