COURSE OVERVIEW:

Seismic well tie and wavelet estimation represent the fundamental calibration step in any seismic interpretation or reservoir characterization project. This process involves aligning geological information from boreholes, measured in depth, with seismic reflection data, recorded in time. A successful well tie allows geoscientists to confidently identify which seismic reflections correspond to specific geological horizons, such as the top of a reservoir or a major unconformity, ensuring that the final interpretation is grounded in physical truth.

The scope of this course covers the creation of synthetic seismograms, which act as the bridge between the well and the seismic volume. Participants will learn how to process sonic and density logs, perform fluid substitution, and handle the complexities of time-depth conversion using checkshots. Central to this process is the estimation of the seismic wavelet, the fundamental pulse of the seismic data. The course explores various methods of wavelet extraction, including statistical, deterministic, and multi-well approaches, and explains how wavelet phase and frequency content directly impact the quality of the tie.

Coverage includes the diagnosis and resolution of common well-tie problems, such as stretch-and-squeeze issues, phase mismatches, and data quality discrepancies. Through practical exercises, participants will learn how to quantify the "goodness of fit" between synthetic and real seismic data. Mastering these techniques is essential for accurate horizon picking, seismic inversion, and any subsequent quantitative interpretation, as a poor well tie will compromise the integrity of the entire geological model.

COURSE OBJECTIVES:

After completion of this course, the participants will be able to:

• Explain the physical and mathematical basis of the synthetic seismogram.
• Edit and condition sonic and density logs for seismic calibration purposes.
• Utilize checkshot and VSP data to establish a reliable time-depth relationship.
• Calculate reflection coefficients and the impedance profile from well data.
• Apply different wavelet estimation methods: Statistical vs. Deterministic.
• Identify the phase (zero, minimum, or mixed) of the seismic data.
• Perform multi-well wavelet extraction for a consistent regional model.
• Align synthetic traces with seismic data using stretch-and-squeeze techniques.
• Evaluate the correlation coefficient to determine the quality of the well tie.
• Diagnose causes of poor ties, including noise, multiples, and log quality.
• Use fluid substitution (Gassmann) to model the seismic response of gas vs. oil.
• Assess the impact of seismic bandwidth on the resolution of the tie.
• Formulate a standardized well-tie workflow for exploration and production teams.

TARGET AUDIENCE:

Geophysicists, Geologists, Petrophysicists, and Seismic Interpreters responsible for data calibration and reservoir mapping.

TRAINING COURSE METHODOLOGY:

A highly interactive combination of lectures, discussion sessions, and case studies will be employed to maximise the transfer of information, knowledge, and experience. The course will be intensive, practical, and highly interactive. The sessions will start by raising the most relevant questions and motivating everybody to find the right answers. The attendants will also be encouraged to raise more of their questions and to share in developing the right answers using their analysis and experience. There will also be some indoor experiential activities to enhance the learning experience. Course material will be provided in PowerPoint, with necessary animations, learning videos, and general discussions.

The course participants shall be evaluated before, during, and at the end of the course.

COURSE CERTIFICATE:

National Consultant Centre for Training LLC (NCC) will issue an Attendance Certificate to all participants completing a minimum of 80% of the total attendance time requirement.