Abstract
Penobscot Field is located in the Sable Sub-basin in Nova Scotia, Canada, where a 3D seismic acquisition campaign was carried out in 1991 and also two oil wells were previously drilled (L-30 and B-41). In the interpreted seismic data, a discrepancy was found in the travel times of the seismic waves near well B-41, causing a false structural height in the Naskapi Member, Mississauga Formation (Early Cretaceous or Lower Cretaceous) and deeper formations (10 to 15 ms, i.e. approximately 25 m). It was decided to find a solution of this problem using synthetic models. First, making a delimitation of the study area by means of a seismic subcube, which were later interpreted surfaces of interest, through the well data. The average velocity and density properties were found for each interpreted strata. Subsequently, a 2D seismic acquisition was simulated, choosing a line that crossed both wells and through the use of ray traces, synthetic shot gathers were obtained and processed through the use of different seismic migration tests, and the final solution was found to be Kirchhoff pre-stacking migration in depth.
Highlights
In the hydrocarbon exploration stage, seismic methods have the main role in the acquisition stage, as well as during the subsequent processing of the seismic data and, the interpretation of the data which the first descriptions of the basin, both structurally and stratigraphically, is acquired (Alsadi, 2017)
For all the phases mentioned above, an excellent application of seismic methods is needed, or else there can be large losses of invested money, such as in the Penobscot Field located offshore in Nova Scotia, where a 3D seismic acquisition was performed by the Nova Scotia Offshore Petroleum Board back in 1991, with an approximate area of 66Km2 (5.5Km x 12Km), where subsequently a problem in the interpretation of the data was found in the travel times of the seismic waves
It is necessary to mention that, in its exploration phase of the Penobscot Field, two wells were drilled (Penobscot L-30 and Penobscot B-41) which had the main objective to verify the existence of hydrocarbons in two structural highs that are in contact with reverse faults, the obtained results were not entirely positive, because well B-41 was not a producer, traces of oil were found in it (Crane & Clack, 1992)
Summary
In the hydrocarbon exploration stage, seismic methods have the main role in the acquisition stage, as well as during the subsequent processing of the seismic data and, the interpretation of the data which the first descriptions of the basin, both structurally and stratigraphically, is acquired (Alsadi, 2017). For all the phases mentioned above, an excellent application of seismic methods is needed, or else there can be large losses of invested money, such as in the Penobscot Field located offshore in Nova Scotia, where a 3D seismic acquisition was performed by the Nova Scotia Offshore Petroleum Board back in 1991, with an approximate area of 66Km2 (5.5Km x 12Km), where subsequently a problem in the interpretation of the data was found in the travel times of the seismic waves This area is comprised of clastic and carbonate sequences which were formed from the Pangea rupture stage, later depositing the interest formations in this research (Wyandot and Mississauga Formation) Wyandot being a carbonate platform from the Late Cretaceous and, this formation caused the problem in.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
