1887

Abstract

The Multi-Transient ElectroMagnetic (MTEM) technique is used to delineate resistive targets that may correspond to hydrocarbon reservoirs. Prior to actual surveys, feasibility studies are conducted to determine the probable detectability of the target of interest, set in the background resistivity structure where known or postulated. From the 2D model cross-section, resistivity profiles are extracted at positions along a profile. Modelling comprises determining the earth’s impulse responses for appropriate source-receiver offsets and these may be varied in the feasibility process. Two methods are then used to assess detectability. One exploits the amplitude of the impulse responses by plotting common offset sections. Shallow offsets illuminate targets near-surface, if they are addressable, whilst longer offsets see deeper. In an alternative method, the arrival time of the peak of the earth’s impulse response is used to determine an apparent resistivity. Values may be determined for all offsets at all selected profile positions and the result plotted as a 2D resistivity pseudo-section. Detectable targets are those that can be seen to correspond with the target reservoir of interest. Resolvability of individual targets within a sequence of overlapping stacked reservoirs on land and in marine studies will be addressed.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20147964
2008-06-09
2020-09-19
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20147964
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error