| 碳酸盐团簇同位素在沉积盆地热演化中的应用——以塔里木盆地顺托果勒地区为例 |
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| 引用本文： | 刘雨晨,邱楠生,常健,贾京坤,李慧莉,马安来.碳酸盐团簇同位素在沉积盆地热演化中的应用——以塔里木盆地顺托果勒地区为例[J].地球物理学报,2020,63(2):597-611. |
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| 作者姓名： | 刘雨晨 邱楠生 常健 贾京坤 李慧莉 马安来 |
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| 作者单位： | 1. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249;2. 中国石油大学(北京)地球科学学院, 北京 102249;3. 中国石油化工股份有限公司石油勘探开发研究院, 北京 100083 |
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| 基金项目： | 国家自然科学基金项目（41830424），国家油气重大专项（2016ZX05007-003-005），北京市科技新星与领军人才培养项目（Z171100001117163），中石油科技创新基金（2017D-5007-0102）和中国石油化工股份有限公司科技部项目（P17049-1）的联合资助. |
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| 摘 要： | 塔里木盆地奥陶系碳酸盐岩储层是近年来油气勘探的热点.然而,由于碳酸盐岩地层缺乏有效的古温标,极大的制约了热历史的研究.团簇同位素作为一种新的有效古温标,为碳酸盐岩地层的热历史恢复提供了可能.本文通过测试塔里木盆地顺托果勒地区奥陶系碳酸盐岩储层中不同结构组分的团簇同位素,利用固态重排模型重建了塔里木盆地顺托果勒地区不同构造单元的奥陶纪以来的热历史.塔里木盆地顺北、顺托和顺南地区泥晶基质的团簇同位素温度(TΔ47)平均值分别为92.34℃、124.35℃和170.27℃,除了顺南地区SN501井和SN4井外,其他的所有样品在最高埋藏温度下尚未达到完全热平衡,可用于热历史重建.通过对顺托果勒地区典型单井设置不同的热史路径,进而明确最高埋藏温度的上限为170～190℃.此外,二叠纪的异常高温可能是地层抬升剥蚀和岩浆活动热事件共同作用的结果,顺托果勒地区二叠纪地温梯度范围为26～46℃/km,呈现西北高东南低的趋势,地温梯度的空间变化表明可能与岩浆活动有关,且岩浆活动中心可能位于塔北地区附近,岩浆活动造成热响应可能在SN3井附近终止.
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| 关 键 词： | 团簇同位素 热历史 固态重排模型 碳酸盐岩 塔里木盆地 |
| 收稿时间： | 2019-04-23 |
Application of clumped isotope thermometry to thermal evolution of sedimentary basins: A case study of Shuntuoguole area in Tarim Basin |
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| LIU YuChen,QIU NanSheng,CHANG Jian,JIA JingKun,LI HuiLi,MA AnLai.Application of clumped isotope thermometry to thermal evolution of sedimentary basins: A case study of Shuntuoguole area in Tarim Basin[J].Chinese Journal of Geophysics,2020,63(2):597-611. |
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| Authors: | LIU YuChen QIU NanSheng CHANG Jian JIA JingKun LI HuiLi MA AnLai |
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| Institution: | 1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;2. College of Geosciences, China University of Petroleum, Beijing 102249, China;3. Sinopec Petroleum Exploration & Production Research Institute, Beijing 100083, China |
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| Abstract: | The Ordovician carbonate reservoirs in the Tarim Basin are hotspots for oil and gas exploration in recent years. However, due to the lack of effective paleo-geothermometers in carbonate formations, thermal history studies have been greatly restricted. Clumped isotope, as a new effective thermal indicator, provides the possibility for thermal history reconstruction of carbonate formations. In this study, by testing the clumped isotopes of different components in the Ordovician carbonate reservoirs in Shuntuoguole area of the Tarim Basin, the thermal histories of different tectonic units in Shuntuoguole area were reconstructed. The average isotope temperature (TΔ47) of the micrites in the Shunbei, Shuntuo and Shunnan areas are 92.34℃, 124.35℃ and 170.27℃, respectively. Except for the SN501 well and the SN4 well in the Shunnan area, all other samples have not reached full thermal equilibrium at the highest burial temperature and can be used for thermal history reconstruction. By setting different thermal history paths for typical single wells in the Shuntuoguole area, the upper limit of the maximum temperature is determined to be 170~190℃. In addition, the abnormal high temperature of the Permian may be the result of the combination of erosion and magmatic activity events. The Permian geothermal gradient in the Shuntuoguole area ranges from 26.75℃/km to 46.28℃/km, showing a trend of high northeast and low southeast. The spatial variation of the geothermal gradient suggests that the magma activity center may be located near the Tabei area, and the thermal response caused by magmatic activity may terminate near the SN3 well. |
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| Keywords: | Clumped isotope Thermal history Solid-state bond reordering Carbonate rock Tarim Basin |
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