Shallow Seismic Reflection Survey by Using Accelerated Weight Drop as Seismic Source

Onshore reflection seismic surveying for shallow objectives is a challenging task in Indonesia. The use of AWD (accelerated weight drop) as seismic source for an eco-friendly onshore shallow seismic survey is tested. The experiment was conducted around Jepon-1 well in Central Java, Indonesia which is a candidate for CO2-injection. This experiment is as initial investigation before baseline seismic survey is carried out around mid-2016. The CO2-injection itself will be started end-2017. This site was chosen as the first carbon capture and storage (CCS) pilot project in Southeast Asian region. The purpose of this survey is only to study the effectiveness of the AWD source for shallow seismic survey. Moreover, this survey is intended only to test the performance of AWD (ESS-200) seismic source and determine the optimum survey parameters for subsequent seismic baseline survey for monitoring CO2 injection in wells Jepon-1 and its vicinity. We found that the deepest reflections that could be imaged is only 650 m below the surface. To complete the data acquisition of 500m, it took only two operation days with a total cost of about USD 2,000. Thus, the use of AWD needs much less investment than similar surveys that use dynamite or mini-vibroseis as source.