Geophysical modeling of subsurface volumes based on horizon extraction

摘要

Method and system is described for modeling one or more geophysical properties of a subsurface volume. The method includes extracting locations from the data volume and combining them into an object, for example a horizon. The extraction may begin with selecting one or more initial traces, assigning labels to each sample of each trace, selecting a propagation pattern, and propagating the labels from the initial traces along a vector volume. Then, locations with the same label are extracted (1106). As an alternative to label propagation, a specific type of labeled volume (1102) may be obtained, such as a stack of surfaces (1132). The object may then be further modified or utilized to enhance the process of producing hydrocarbons.

主权项

1. A method of converting measured data into a subsurface model comprising:
obtaining a labeled volume associated with a subsurface volume, wherein the labeled volume has a plurality of traces and each of the plurality of traces include a plurality of samples and each sample is associated with a surface number; obtaining a surface number perturbation map; selecting a surface number in the labeled volume; extracting locations in the labeled volume associated with the selected surface number, comprising:
for each sample in the labeled volume, referred to as the selected sample, adjusting the selected surface number associated with the selected sample in the labeled volume based on the surface number perturbation map;adjusting the selected surface number based on the surface number perturbation map and comparing it to the adjusted surface number associated with the selected sample;determining whether the comparison indicates that the adjusted surface number for the selected sample matches the adjusted selected surface number;if the adjusted selected surface number matches the adjusted surface number associated with the selected sample, extracting the location of the selected sample;if the adjusted selected surface number does not match the adjusted surface number associated with any sample of a trace, then determining an interpolated location for the selected surface number between neighboring samples with closest surface number values and extracting the interpolated location; combining locations extracted in the extracting locations in the labeled volume step into an object associated with the selected surface number; wherein the selecting, extracting, and combining are performed using a computer; one or more of storing the object in memory accessible by a computer system and displaying the object on a display accessible by the computer system;
upon associating the object with hydrocarbons, drilling a well to access the hydrocarbons; andproducing the hydrocarbons from the well.