Spatial Distribution and Time Response Characteristics of the Reservoir-induced Seismicity and Its Relationships with Geological Structure Environment in the Reservoir Region
ZHOU Bin
LI Lei
SUN Feng
SHI Shuiping
Abstract：On the basis of the previous work and collections of the latest information on reservoir-induced seismicity, the spatial distribution and time response characteristics of RIS and its relationships with geological structure environment in the reservoir region had been studied by using the method of statistics, the results show that ① in the spatial distribution, RIS mainly concentrated in the range of 10 km away from the reservoir margin and confined to a particular segment of the reservoir. When a certain condition of geological structure and hydrogeological conditions are met in the reservoir region, the activities of RIS will migrate with the changes of water level during water storage and drainage. ② the time responses of RIS are different from region to region and from reservoir to reservoir. In general, RIS’s initial response is dominant when the reservoir is filled less than 1 year, while most of the main earthquakes of RIS occur in more than 1 year after the reservoir initial storage. The “mixture response” is the main form of RIS activities for the long process of reservoir storage, while the“rapid response” and “delayed response” are only a periodic phenomenon. ③RIS response has very complex and diverse relationships with the reservoir water level changes, which can be positive correlation or negative correlation, and higher magnitude of RIS shows certain dependence on the rate of water level changes. ④ RIS spatial and temporal distribution is controlled by the existing internal causes including local terrain features, geological structure, lithologic and hydrogeological conditions in the reservoir area. In fact, all these causes that influenc the spatial and temporal distribution of RIS are interdependent and dialectical united and can not be completely separated.
Keywords：Reservoir-induced seismicity (RIS)Spatial distributionTime responseGeological structure environment in the reservoir region
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1-10 )