Seismic amplitude anomalies and AVO analyses at Mestena Grande Field, Jim Hogg Co., Texas

Author:

Burnett R. C.1

Affiliation:

1. Union Texas Petroleum, P.O. Box 2120, Houston, TX 77252-2120

Abstract

Mestena Grande field is located in northeast Jim Hogg Co., Texas. It produces gas and condensate, primarily from the middle member of the Middle Eocene Queen City formation. The producing zone is a deep, thin, high impedance sandstone which generates amplitude anomalies on the stacked data. AVO (amplitude versus offset) analyses were performed to investigate those anomalies and determine if they could aid in field development or exploration along the trend. Modeling the AVO response of a productive well has predicted an amplitude decrease with offset from a high impedance sandstone. However, amplitudes increase with offset on the crest of the field. At Mestena Grande field, three categories of seismic amplitudes correspond with production with only one exception. The first category exhibits strong amplitudes on the stacked data and amplitudes increase with offset. This amplitude category is seen around the best wells in the field. Second are the moderate amplitudes which do not increase with offset that surround the wells producing at moderate rates. The third category is characterized by very weak amplitudes which decrease with offset, occurring near all but one of the dry holes. The disagreement between the results of the modelling and the real data is attributed to the lack of accurate shear wave velocities and the presence of very thin beds.

Publisher

Society of Exploration Geophysicists

Subject

Geochemistry and Petrology,Geophysics

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Joint AVO inversion in the time and frequency domain with Bayesian interference;Applied Geophysics;2016-12

2. A method for identifying AVO response with VSP data;2016 Workshop: Rock Physics and Borehole Geophysics, Beijing, China, 28-30 August 2016;2016-08-30

3. AVO modeling and the locally converted shear wave;GEOPHYSICS;1994-08

4. Amplitude map analysis using forward modeling in sandstone and carbonate reservoirs;GEOPHYSICS;1993-10

5. Amplitude‐versus‐offset modeling and the locally converted shear wave;SEG Technical Program Expanded Abstracts 1993;1993-01

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