Fine Interpretation Technology And Application Of3D Seismic Data On A Group Coal Seam In Zhangji Coal Mine

In recent years, Seismic multi-attribute comprehensive interpretation technology which based on the3D seismic data fine structural interpretation, lithology interpretation has become the main interpretation method of seismic exploration in coalfield.A group coal seam under the6th coal and the8th coal seam, on Taiyuan group and Ordovician limestone in Huainan coalfield. Geological problems of mining are more complex. So far, It is not enough that fine interpretation of3D seismic data aimed at A group coal seam. Adopting the traditional method in structural interpretation and thickness prediction mainly. In order to establish complex geology problems in A group coal seam mining. To meet the needs of coal mine development, The research and application of3D seismic fine interpretation technology is emergent to structure, coal seam thickness and limestone fissure prediction.This paper based on the theoretical study previous and3D seismic data in Zhangji mine, centred on A group coal seam and Taiyuan group limestone. It interpret the structure of14131working face by using ant tracking technology and three-dimensional structure modeling. It is optimized by using multiple attributes analysis technology that arc length, the instantaneous amplitude, relative acoustic impedance, amplitude standard deviation from20kinds of seismic attributes. The four attributes predict the coal thickness by multivariate polynomial model. RMS and variance attribute and instantaneous frequency analyse structural features of limestone by body sculpting technology.The following results through3D seismic fine interpretation based on the conventional interpretation:1. Among the six interpreted faults,three faults is verified by revealed tunnel in14131working face, the rest of faults will be verified by the following minging.2. Coal seam thickness distribution is generally stable in14131working face. The range of coal seam thickness is from5.44m to9.38m and the average thickness is7.41m. The thinner coal seam in the northern working face,which is6.5m.So it is to conveying tunnel coal seam thickness in14131working face. The actual result is consistent with the tunnel exposed. 3. The fracture growth in the southern and northern of14131working face. Through the comparative analysis with the ant tracking structure interpretation results,obtain the following understanding:The more fault development, the higher degree karst development.In a word, the overall development of fissure is smaller.This paper provides more accurate interpretation method for the A group coal seam structural analysis and thickness prediction,at the same time,it offers new thought for finding out the limestone structure. There are still some problems unsolved well in the following:Limestone horizon calibration accuracy is not enough in the case of lack of Borehole logging data and the limestone structure analysis is not up to quantitative.