Abstract：At present, the detection of lateral discontinuity of seismic signals mostly aims at fault detection, recognition and automatic interpretation, involving edge-preserving filtering technology, coherent cube technology, ant tracking technology, etc., which have been researched and used widely, but less researches on the detection of small-scale discontinuous seismic signals. As a third-generation coherent algorithm, local structural entropy has better noise resistance and higher resolution than the previous two generations of coherent algorithms, and has higher detecting accuracy for small discontinuous structures inside sandstone reservoirs. Taking local structural entropy as a core, and edge-preserving filtering and ant tracking attribute enhancement as support, a technology combination are formed for detecting the lateral discontinuity of sandstone reservoir. The process includes interpretative processing of seismic data, calculation of coherent attributes, characterization and optimization, and result verification and application. The application to the target sandstone unit in the H oilfield in the South China Sea shows that the results provided by the technology combination are consistent with the mudstone encountered by a horizontal well, proving the effectiveness of the technology combination.
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