Mechanistic insights into paired primary and mode-converted AVO responses

Jaiswal, Priyank (Oklahoma State University) | Raj, Rohit (Oklahoma State University) | Verma, Sumit (University of Texas Permian Basin)

OnePetro 

When elastic property contrasts across a reflector is low, its primary amplitude-versus-offset (AVO) response can be approximated by a straight line within 30° incidence angle whose intercept and gradient can be used in turn to constrain P- and S- wave velocities of the over- and underlying media. This paper postulates that by approximating the converted-wave AVO response by a straight line within 30° incidence angle, both primary and mode-converted intercepts and gradients can be used to additionally constrain the density of the over- and underlying media. The paper further shows that the six possible combinations of primary and mode-converted intercepts and gradients are associated with characteristic variations in elastic properties contrasts across the reflector and, through rock physics modeling, provides mechanistic insights into the causation of those variations. Ongoing work applies this concept to field data.

Presentation Date: Wednesday, October 17, 2018

Presentation Date: Wednesday, October 17, 2018

Start Time: 9:20:00 AM

Location: Poster Station 11

Presentation Type: Poster