Acquisition of Borehole Seismic Data in a Challenging Transition Zone

This paper presents a case study of borehole seismic data acquisition in a horizontal well with source positions in a transition zone that ranges from marine to mangrove to tidal mud plain environments. Deploying geophone tools for acquiring data in horizontal wells is not new to the industry but there are still challenges to overcome. In addition, deploying multiple and repeatable seismic sources in a transition zone that can be fired in the order of 600 times take special design, planning, and execution. In this paper, we will show how the survey was designed and the source points selected. We will further show a unique method used for deploying airguns and operating them in a safe and repeatable manner. Lastly, the paper will discuss the acquisition methods that were followed.