基于地质统计学反演预测煤层厚度  

Coal Thickness Prediction Based on Geostatistical Inversion

作　　者：袁峰[1,2] 叶亮春 乔会 孙黄利 侯丁根 Yuan Feng Ye Liangchun Qiao Hui Sun Huangli Hou Dinggen(Key Laboratory of Coal Resource Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi ＇an, Shaanxi 710026 Shaanxi Provincial Coal Geophysical Prospecting, Surveying and Mapping Co. Ltd., Xi ＇ an, Shaanxi 710005 Department of Geology and Environmental Engineering, Xi＇an University of Science and Technology, Xi＇an, Shaanxi 710054 Shenhua Geological Exploration Co. Ltd., Beijing 102209)

机构地区：[1]国土资源部煤炭资源勘查与综合利用重点实验室,西安710026 [2]陕西省煤田物探测绘有限公司,西安710005 [3]西安科技大学地质与环境学院,西安710054 [4]神华地质勘查有限责任公司,北京102209

出　　处：《中国煤炭地质》2017年第2期65-69,共5页Coal Geology of China

基　　金：陕西省科技统筹基金项目(2016FWPT-16);国土资源部煤炭资源勘查与综合利用重点实验室基金项目(ZZ2016-2)

摘　　要：受基底影响,永陇矿区2号可采煤层厚度变化范围较大,为0.65~26.79 m。为实现高精度煤层厚度预测,选取该区对地层岩性分辨率较高的自然伽马作为预测属性,并将计算的岩性概率模型作为三维数据约束进行地质统计学反演。通过地质统计学反演得到的岩性数据,区分了煤层和泥岩,成功的预测了煤层的厚度。根据地质统计学反演预测的煤层厚度,可知该区西南部煤层较薄,只有0~5 m;东北部煤层较厚,一般超过20 m。对比地质统计学反演预测的煤层厚度与实际钻探揭露的煤层厚度,可以看出地质统计学反演预测煤层厚度更接近于钻探揭露的煤层厚度,平均准确率达80%以上,其精度高于传统的确定性反演。Because of impact from basement, the thickness of mineable coal No.2 in the Yonglong mining area is variable with thickness from 0.65m to 26.79m. In order to achieve high accuracy coal thickness prediction, the strata lithological resolution higher gamma-ray has been selected as prediction attribute. And using computation lithological probability model as 3D data constraint carried out the geostatistical inversion. Through geostatistical inversion obtained lithological data can distinguish coal and mudstone, thus predicted coal thickness successfully. Based on geostatistical inversion predicted coal thicknesses have found that coal seams in the southwestern part of the area are thinner, only 0-5 m; northeastern part thicker, generally over 20m. Through comparison of coal thicknesses from geostatistical inversion and actual drilling revealed, can find out that the thickness from geostatistical inversion is close to drilling revealed with average accuracy above 80 %, thus higher than traditional deterministic inversion.

关 键 词：煤厚 地质统计学反演 确定性反演 

分 类 号：P631.4[天文地球—地质矿产勘探]