A Comprehensive Anisotropic Velocity Model Building Case Study - Tengiz Full Azimuth Land TTI PSDM

Searle, Alfred B.; Xing, Huadan; Iskakov, Elrad; Jazbayev, K.; Jenkins, S.D.; Lee, K.S.; McLean, Noah

doi:10.3997/2214-4609.20141105

Cited by 6 publications

(1 citation statement)

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“…Saller et al conducted a detailed study on the pre-salt stratigraphy and depositional system of the Kwanza basin in Angola and considered that the organicrich mudstones deposition might be the source of most hydrocarbons [28]. The pre-salt carbonate reservoir in the Kashagan complex has multiple lithological characteristics, mainly calcilutites, grainstones, boundstones, microbialites, and carbon breccias [29][30][31][32]. Cheng et al used Pre-salt RTM forward modeling technology to identify pre-salt structure artifacts [33].…”

Section: Introductionmentioning

confidence: 99%

Pre-Stack Seismic Data-Driven Pre-Salt Carbonate Reef Reservoirs Characterization Methods and Application

et al. 2021

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Carbonate reservoirs have significant reserves globally, but the substantial heterogeneity brings intractable difficulties to exploration. In the work area, the thick salt rock reduces the resolution of pre-salt seismic signals and increases the difficulty of reservoir characterization. Therefore, this paper proposes to utilize wavelet frequency decomposition technology to depict the seismic blank reflection area’s signal and improve the pre-salt signal’s resolution. The high-precision pre-stack inversion based on Bayesian theory makes full use of information from various angles and simultaneously inverts multiple elastic parameters, effectively depicting reservoirs with substantial heterogeneity. Integrating the high-precision inversion results and the Kuster-Toksöz model, a porosity prediction method is proposed. The inversion results are consistent with the drilling rock samples and well-logging porosity results. Moreover, the reef’s accumulation and growth, which conform to the geological information, proves the accuracy of the above methods. This paper also discusses the seismic reflection characteristics of reefs and the influence of different lithological reservoirs on the seismic waveform response characteristics through forward modeling, which better proves the rationality of porosity inversion results. It provides a new set of ideas for future pre-salt carbonate reef reservoirs’ prediction and characterization methods.

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Section: Introductionmentioning

confidence: 99%