Case Study

SmartSolo in Shanxi province, China.

From 27th June to 1st July 2017, Dynamic Technologies conducted a field test to compare the performance of 5Hz SmartSolo single receivers and a 408 system using 5×2 geophone strings.

The test was completed in Xixian, Shanxi province, a deeply gullied area of the Loess Plateau. The terrain exhibits uninterrupted mountains running from the higher altitude north-east to lower ground in the south-west. Xixian is a temperate continental monsoon climate where the annual average temperature is 9.5℃, annual rain is between 450 and 550mm, receiving around 2740.9 hours of sunshine a year, and only 150-160 days without frost.

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The instruments for comparison are SmartSolo IGU-16 with 5Hz high sensitivity geophone designed & manufactured by DTCC, and 408 Sercel system with 10Hz 5×2 geophone strings

Test parameter:
Sample rate: 1ms
Recording length: 4s
Gain: 12dB
Reciverinterval: 10m
Source line: 40m
Source type: Dynamite @ 3 holes @ 12m interval @ 3KG

On initial review of the unstacked acquired data, the Signal-to-Noise Ratio (SNR) of the 485 geophone strings in the shot gather appear slightly better than IGU-16. However, on careful examination of the stacked section, there are no differences between the two instruments.

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The test results indicate that the 408 geophone strings had slightly improved SNR on raw acquisition, but after stacking, they showed no difference from the IGU-16 single geophones. Operationally however, the IGU showed significant benefits in HSE and deployment efficiency. At only 1/3 the weight of the 408 per receiver station, the equipment could be moved more safely, and still deployed up to 50% more quickly. With these additional considerations, it was concluded that the SmartSolo was more suitable than the 408 for this type of environment.