One of the primary goals of a 4D marine acquisition is to replicate the source/receiver positions of a previously acquired baseline so as to maximize repeatability. Some of the originally shot lines (often called prime lines) are reacquired to improve repeatability, usually depending on proximity to the prospect/reservoir and the availability of funds. The decision to re-acquire a line or a swath is commonly based on sub-surface coverage (fold) plots, dS (distance between sources) plots and/or dSdR (sum of distance between sources and distance between receivers) plots that are generated onboard as a part of standard QC during a 4D monitor acquisition. This can be quite subjective and expensive since we may end up acquiring more data than necessary.
To address this issue of cost versus data quality for 4D marine streamer monitor surveys, a methodology has been developed to aid decision making for real-time 4D acquisition optimization. This methodology uses redundant information from previous baseline/monitor surveys to help in the decision making of re-acquiring lines for an ongoing monitor survey.
Presentation Date: Tuesday, October 16, 2018
Start Time: 8:30:00 AM
Location: 204C (Anaheim Convention Center)
Presentation Type: Oral