Multi-parameter Calibration Algorithm Based on 4D Seismic Inversion

2011 ◽  
Author(s):  
Kai Xie ◽  
WenMao Yu ◽  
HuoQuan Yu ◽  
Peng Wu ◽  
Tao Li ◽  
...  
Keyword(s):  
Seismic Inversion ◽  
Parameter Calibration ◽  
Calibration Algorithm ◽  
4D Seismic

4D Seismic Inversion with Best Feasible Approximation

1999 ◽  
Author(s):  
M. Nickel ◽  
H. H. Veire ◽  
C. Signer ◽  
T. Soeter ◽  
P. O. Tennebø ◽  
...  
Keyword(s):  
Seismic Inversion ◽  
4D Seismic

Trace Warping vs. Impedance Warping in 4D Seismic Inversion

2015 ◽  
Author(s):  
L. Griffiths ◽  
T.D. Blanchard ◽  
J.A. Edgar ◽  
M.S. Shahraeeni
Keyword(s):  
Seismic Inversion ◽  
4D Seismic

scholarly journals The influence of pore system change during CO2 storage on 4D seismic interpretation

2019 ◽  
Vol 74 ◽  
pp. 81
Author(s):  
Lin Li ◽  
Jinfeng Ma
Keyword(s):  
Co2 Storage ◽  
Seismic Inversion ◽  
Pore System ◽  
S Wave ◽  
Wave Velocities ◽  
Rock Testing ◽  
Amplitude Versus Offset ◽  
Weyburn Field ◽  
4D Seismic ◽  
Amplitude Versus

A 4D seismic forward model constitutes the foundation of 4D seismic inversion. Here, in combination with the Gassmann equation, the Digby model is improved to calculate the S-wave velocity, and the resulting equation is verified using rock testing results. Then, considering the influences of changes in the pore pressure, CO2 saturation and porosity on the P- and S- wave velocities, rock testing results from a CO2 injection area in the Weyburn field are used to calculate the P- and S-wave velocities of the reservoir. These P- and S-wave velocities are found to overlap under different pressure conditions with or without considering porosity variations. Therefore, two-layer models and well models are developed to simulate synthetic seismograms; the models considering porosity variations may provide greater seismic responses and different Amplitude Versus Offset (AVO) trends in the synthetic seismogram profiles than those without considering porosity variations. Thus, porosity variations must be considered when establishing 4D seismic forward models.

The Laser Scanning System Calibrations in Unmanned Yard

2013 ◽  
Vol 718-720 ◽  
pp. 1585-1590 ◽  
Author(s):  
Shi Hui Zhang ◽  
Fang Wen Zhu ◽  
Zheng Peng Yuan ◽  
Jin Bo Chen
Keyword(s):  
3D Reconstruction ◽  
Laser Scanning ◽  
Operating Efficiency ◽  
Scanning System ◽  
Laser Parameter ◽  
Parameter Calibration ◽  
Calibration Algorithm ◽  
Laser Scanning System ◽  
System Operating

In an unmanned yard, some parameters of the system would change due to equipments wear and deformed. These changes resulted in the 3D reconstruction parameters changing. The inaccuracy of the 3D reconstruction parameters decreases the system operating efficiency and result in the waste of resources and energy. In this paper, a rapid laser parameter calibration algorithm was discussed, the experiment result in a real unmanned yard show this method is feasible.

scholarly journals Assessment of updated low frequency model in delineating bypassed hydrocarbon reservoir: A 4D seismic study of ’X’ - field, offshore, Niger Delta, Nigeria

2020 ◽  
Vol 13 (36) ◽  
pp. 3738-3753 ◽  
Author(s):  
Aniefiok Sylvester Akpan ◽  
Keyword(s):  
Acoustic Impedance ◽  
Deterministic Model ◽  
Low Frequency ◽  
Seismic Inversion ◽  
Fluid Replacement ◽  
Inversion Method ◽  
Frequency Model ◽  
Hydrocarbon Reservoir ◽  
Model Based ◽  
4D Seismic

Aim/objectives: The aim of this research is, to use Time lapse (4D) seismic and investigate the influence of low frequency update in deterministic model-based seismic inversion employed in delineating a prospect saturated with bypassed hydrocarbon accumulation. Method: The dataset employed in this study incorporates 4D seismic volumes with fifteen (15) years production, interval between 2001 baseline and 2016 monitor seismic vintages. The inversion was carried out using full bandwidth of the updated low frequency and bandpass filtered low frequency approaches. The seismic vintages (baseline and monitor) were simultaneously inverted into acoustic impedance volumes for the two approaches. The formation fluid and lithology were discriminated through fluid replacement modelling (FRM) based on the colour separation between brine and gas saturation scenarios. Findings: The two inversion methods employed reveal six (6) zones suspected to be saturated with bypassed hydrocarbons. The delineated bypassed zones are masked in the full bandwidth approach,depicting the effect of the updated low frequency model. Meanwhile, the bandpass filtered approach result presents a better delineated bypassed reservoir as the zones are more pronounced when compared with the full bandwidth approach. Porosity estimate reveals that the bandpass filtered approach is characterized with excellent porosity in the suspected bypassed zones. The results equally gave more reliable and full delineated bypassed zones. Originality and novelty: The dataset employed in this study were obtained from a producing hydrocarbon field which, interest is to maximize the production of oil/gas. The study will bridge the inherent gab observed in using model-based seismic inversion approach to analyse and interpret seismic data in order to delineate hydrocarbon prospects. The research reveals that,the model-based seismic inversion method is still very effective in delineating hydrocarbon prospect when the updated low frequency is bandpass filtered to remove the model effect which influences the inverted acoustic impedance results. Keywords: Porosity; frequency; bypassed; reservoir and impedance

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