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Two-dimensional seismic and ore-level geological characteristics of Liyuan salt deposit in Puyang County,Henan Province |
Wan-Zhong LI1,2, Chong-Yang CHAI1, Ke-Ying LI3, Wei SONG1 |
1. Henan Institute of Geological Sciences,Zhengzhou 450001,China 2. Henan Key Laboratory for Metallogenetic Process of Metal Mineral Resource and Resource Utilization,Zhengzhou 450001,China 3. Resources and Environment Investigation Center of Henan Provincial Coalfield Geology Bureau,Zhengzhou 450001,China |
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Abstract The Liyuan rock salt mining area in Puyang County of Henan Province is located in the Qianliyuan deposition center of the tectonic unit of the Dongpu sag.Based on the exploration of regional mineral resources,the authors carried out a general survey of the rock salt resources in this area.Through the "two-dimensional earthquake first,borehole verification,digital logging,indoor laboratory" and other means,the distribution characteristics,depth and thickness of sand-salt in this area were basically ascertained.The rock salt deposits in the area have continuous multi-phase,strong amplitude,high apparent resistivity and low natural gamma.The vertical direction is the rhythmic layer change of salt rock-gypsum salt rock-mudstone.The exploration results of rock salt resources reaching a very large scale indicate the feasibility of two-dimensional seismic exploration in rock salt exploration.The high data-to-noise ratio raw data and fine interpretation of the data constitute the basis for obtaining rich geological results.
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Received: 29 November 2018
Published: 15 August 2019
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Diagram illustrating structure and depocenter of Dongpu Depression
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Stratigraphic section of salt deposits in Shahejie Formation
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Seismic line layout and sha a section rock salt isopach map
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Main line (L160 line) seismic time profile
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钻孔号 | 井深/m | 钻探沙一盐底深度/m | 预测沙一盐底深度/m | 误差/% | ZK0401 | 3286.01 | 3093.24 | 3210 | -3.8 | ZK0403 | 3516.35 | 3485.63 | 3625 | -4.0 | ZK1003 | 3320.47 | 3280.98 | 3370 | -2.7 |
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Comparison of borehole exposure and seismic section prediction of sand-salt bottom depth
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钻孔编号 | ZK0401 | ZK文75 | ZK0403 | ZK1003 | ZK前参1 | 钻孔深度/m | 3286.01 | 3100 | 3516.35 | 3320.47 | 3300 | 东营组底深/m | 2690.00 | | 2945.00 | 2735.00 | | 上部矿层距东营组底界距离/m | 49.00 | | 54.60 | 32.10 | | 上盐群 | 埋深/m | 2941.55~2953.18 | 2825~2865 | 3285.05~3304.10 | 3011.57~3088.61 | 2998~3003 | 层数 | 2 | 2 | 2 | 3 | 1 | 盐层厚度/m | 9.62 | 29.5 | 16.25 | 53.22 | 6 | 下盐群 | 埋深/m | 3003.50~3093.24 | 2903~2984 | 3372.17~3485.63 | 3139.09~3283.83 | 3066~3136 | 层数 | 4 | 4 | 5 | 5 | 3 | 盐层厚度/m | 56.16 | 57 | 75.97 | 86.97 | 43 | 总层数 | 6 | 6 | 7 | 8 | 4 | 总厚度 | 65.78 | 86.5 | 92.22 | 140.19 | 49 | 上、下盐群间隔 | 50.32 | 40 | 68.07 | 50.48 | 65 | 含矿段地层厚度/m | 151.69 | | 200.58 | 272.26 | |
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List of drilling features in Liyuan Salt Mine
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钻孔 编号 | 岩盐层 | 泥岩 | 自然伽马值/API | 视电阻率/(Ω·m) | 自然电位 | 自然伽马值/API | 视电阻率/(Ω·m) | 自然电位 | ZK0401 | 14.0~30.0 | 17.3~20.0 | 低值 | >100.0 | <14.7 | 高值 | ZK0403 | 12.0~40.0 | 12.6~20.0 | 低值 | >110.0 | <12.6 | 高值 | ZK1003 | 21.0~40.0 | 12.2~20.0 | 低值 | >100.0 | <12.0 | 高值 |
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Drilling logging parameters in the area
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ZK1003 (3 025~3 105 m) logging curve and comparison of drilling location
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Rock salt layer logging mark layer comparison chart
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