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三维地震波形差异属性分析在预测岩溶裂隙发育带中应用 预览

Application of 3D Seismic Waveform Differential Attribute Analysis on Karst Fissure Developed Zone Prediction
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摘要 基于岩层反射波各向异性,提出利用三维地震波形差异属性特征预测岩溶裂隙发育带的思路。以断裂构造极为发育的桃园矿南三采区为例,对该采区太原组灰岩顶界面以下30m范围内的岩溶裂隙发育带进行了分析。通过典型剖面波形差异性分析发现,在太原组灰岩岩溶裂隙发育带,其波形差异属性均大于0.16;面沉积环境稳定、岩层保持完整、各向同性的灰岩内,其波形差异属性接近于0。南三采区波形差异属性异常平面图表明,在太灰顶界面下30m内存在3个岩溶裂隙发育带,分别位于采区的西南部和北部。经140个注浆钻孔L验证,在岩溶裂隙发育区,62个钻孔与解释吻合,准确率达88.6%;在岩石完整性较好、岩溶裂隙不发育区,有53个探孔与解释吻合,准确率达75.5%。 Considering anisotropy of strata reflection wave, an idea of using 3D seismic waveform differential attribute features to predict karst fissure developed zone put forward. Taking the faulted structure extremely developed $3 winning district of the Taoyuan coalmine as an example, carried out karst fissure developed zone analysis for the range under the Taiyuan Formation limestone roof interface with- in 30m. Through typical section waveform differentiation analysis has found that within Taiyuan Formation limestone karsI fisstn'e devel- oped zone, all the wavefonn differential attributes 〉0. 16 ; while in sedimentary environment stable, strata keep integrated, isotropie limestone, the waveform differential attributes near 0. The waveform differential attribute anomaly plan of $3 winning district has shown that under Taiyuan Formation limestone roof interface within 30m exists 3 karst fissure developed zones, located in southwestern part and northern part of the winning district respectively. After 140 grouting boreholes verification, in karst fissure developed zones, data from 62 boreholes are tally with interpretation, with accuracy rate 88.6% ; in rock integrated, karst fissure undeveloped zoues, data from 53 boreholes are tally with interpretation with accuracy rate 75.5%.
作者 王瑞杰 Wang Ruijie (Geophysical Prospecting and Research Institute, CNACG, Zhuozhou, Hehei 072750)
出处 《中国煤炭地质》 2018年第1期72-75,80共5页 Coal Geology of China
关键词 波形差异属性 岩溶裂隙 岩性各向异性 二三维地震 桃园矿 waveform differential attribute karst fissure lithological anisotropy 3D seismic Taoyuan coalmine
作者简介 王瑞杰(1966-),男,山东潍坊人,高级工程师。1987年毕业于西安地质学院,一直从事煤田地球物理勘探T作。
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