| 华北邯邢地区奥灰中统三组八段测井曲线特征 |
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| 引用本文： | 邢青春.华北邯邢地区奥灰中统三组八段测井曲线特征[J].中国煤炭地质,2011(4):56-60. |
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| 作者姓名： | 邢青春 |
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| 作者单位： | 河北省煤田地质局水文地质队,河北邯郸056201 |
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| 摘 要： | 华北邯邢地区奥陶系中统灰岩平均厚度562m,分为三组八段,与上覆石炭系煤系地层呈不整合关系,为本地区主要含水地层。为消除下组煤开采威胁、有效防治奥灰水,必须对下伏灰岩各组段给予准确划分。根据该区奥陶系中统灰岩的沉积规律和物性特征,对各组段地层的单一测井曲线特征及多种物性曲线组合特征进行分析,确定了物性标志稳定、连续性强、全区可追踪对比的各组段地层醒目划分标志。鉴于本区自然伽马曲线形态的稳定性,利用数理统计方法对本区40个钻孔进行各组段自然伽马峰值几率计算,求得各组段自然伽马峰值几率表,并以东庞矿观2孔自然伽马曲线奥灰地层中的一段（O2f1）为例,介绍使用该表确定灰岩组段的方法。
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| 关 键 词： | 奥灰地层 测井曲线 物性特征 数理统计 邯邢地区 |
Logging Trace Characteristics of 8 Members in 3 Formations of Middle Ordovician Series Limestone,Handan-Xingtai Area,North China |
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| Xing Qingchun.Logging Trace Characteristics of 8 Members in 3 Formations of Middle Ordovician Series Limestone,Handan-Xingtai Area,North China[J].Coal Geology of China,2011(4):56-60. |
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| Authors: | Xing Qingchun |
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| Institution: | Xing Qingchun(Hydrogeological Exploration Team,Hebei Bureau of Coal Geological Exploration,Handan,Hebei 056201) |
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| Abstract: | The average thickness of limestone in Middle Ordovician Series in the Handan-Xingtai area,North China is 562m.It is the main aquifer of the area and can be divided into 8 members in 3 formations and unconformable contact with overlying Carboniferous coal measures strata.To eliminate threat on mining of lower group coals,control Ordovician limestone water effectively,underlying limestone formations and members should be divided with accuracy.Based on limestone sedimentary pattern and physical property characteristics,analyzed single logging trace and multiple physical traces combination characteristics,and determined striking division marks of physical property indicant stable,continuity perfect,each member and formation stratum can be traced in whole area.In consideration of natural gamma trace configuration is stable in the area,using mathematical statistics carried out natural gamma peak value probability computation for each member and formation in 40 boreholes in the area,and acquired natural gamma peak value probability spread sheet,taking the natural gamma trace in borehole Guan2 in Dongpang coalmine of a member in Ordovician limestone（O2 f 1）as an example,introduced how to determine formation and member in limestone by the use of the spread sheet. |
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| Keywords: | Ordovician limestone strata logging trace physical property characteristic mathematical statistics Handan-Xingtai area |
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