基于自然伽马测井的淮南煤田朱集井田煤系岩浆岩生热率研究

发布时间：2018-03-23 13:27

本文选题：生热率　切入点：自然伽马测井　出处：《煤田地质与勘探》2017年03期

【摘要】：为研究淮南煤田煤系岩浆岩生热率特点及其对地温场的影响,以淮南朱集井田为研究对象,基于36个钻孔内6 208个煤系岩石自然伽马(GR)测井值的基础上,利用自然伽马与生热率GR-A的关系式,计算不同岩石生热率及其标准差,结果得出,煤系沉积岩的GR值由大到小依次为泥岩83.83 API、砂岩62.23 API和煤34.32 API,岩浆岩的GR值为103.89 API,远大于沉积岩;岩浆岩的生热率也最大,平均1.63μW/m3,约为煤的3倍,但因受岩浆岩侵入分期性的影响,其标准差较大。总的来说,朱集井田内煤系岩石放射性生热对区内大地热流的贡献量不大,但岩浆岩的高生热率对岩层生热结构的改变较大。
[Abstract]:In order to study the characteristics of coal-measure magmatic heat generation rate and its influence on geothermal field in Huainan coalfield, taking Zhuji mine field in Huainan as an object of study, based on the natural gamma gr logging value of 6208 coal measure rocks in 36 boreholes, the authors have studied the characteristics of heat generation rate of coal measure magmatic rock in Huainan coalfield and its influence on the geothermal field. By using the relationship between natural gamma and heat generating rate GR-A, the heat generation rate and its standard deviation of different rocks are calculated, and the results are obtained. The gr value of coal-measure sedimentary rock is 83.83 API, the sandstone is 62.23 API and coal 34.32 API, the gr of magmatic rock is 103.89 API, which is much larger than that of sedimentary rock, and the heat generation rate of magmatic rock is also the highest, with an average of 1.63 渭 W / m ~ (3), which is about 3 times of that of coal. However, due to the influence of magmatic intrusion and staging, the standard deviation is larger. In general, the contribution of radioactive heat generation of coal measure rock in Zhuji mine field to the geothermal flow in the area is not large, but the high heat generation rate of magmatic rock has a great change on the formation heat generation structure.
【作者单位】：中国科学院边缘海与大洋地质重点实验室南海海洋研究所;中国科学院大学;安徽理工大学地球与环境学院;西安科技大学地质与环境学院;
【基金】：国家自然科学基金面上项目(41272278)~~
【分类号】：P314;P618.11;P631.817

【相似文献】