FEASIBILITY STUDY OF SEISMIC AVO-INVERSION AND SEISMIC INVERSION CAPABILITIES IN CONDITIONS OF ACOUSTICALLY WEAK-CONTRAST RESERVOIRS AND HOST ROCKS
Вивчення можливостей AVO-аналізу та сейсмічної інверсії в умовах акустично неконтрастних колекторів і вміщувального середовища
Jangirov A. Umirova G. Abdullina A. Karpenko I.
2025Natsionalnyi Hirnychyi Universytet
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu
2025Issue 321 - 28 pp.
Purpose. To improve the accuracy of lithotype classification and reduce uncertainty in hydrocarbon prospecting predictions under conditions of weak contrast in the elastic properties of reservoirs and the surrounding rock by testing a probabilistic approach to seismic data interpretation. Methodology. The study applies a technological approach that includes: 1. Constructing probability distribution functions for lithotypes based on lithological trend data from wells. 2. Using inversion to create cubes of elastic properties and their further analysis using Bayes’ principle. 3. Lithotype classification based on the probabilistic approach by aligning inversion data with probability distributions. Findings. High-resolution seismic data processing was carried out successfully, which ensured their high resolution. Elastic property volumes were obtained and used to assess the probability of various lithotypes. The Bayesian approach to lithotype classification was implemented, demonstrating improved interpretation accuracy in conditions of low elastic property contrast. Promising structures were identified, confirming the effectiveness of the proposed approach in complex geological settings. Originality. A probabilistic method for seismic data analysis was tested, based on the integration of probability distribution functions and inversion data. This methodology allows for accounting for lithological variability and uncertainties during interpretation, representing a novel approach for conditions of low elastic property contrast. Practical value. The developed methodology can be applied in hydrocarbon exploration and field development when reservoir and host rock physical properties exhibit weak contrast. It helps reduce geological risks, optimize drilling site selection, and enhance the economic efficiency of geological exploration.
dynamic interpretation , hydrocarbon deposit , probability-density functions , reservoir , seismic pre-stack inversion
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“Professional Geo Solutions Kazakhstan” LLP, Almaty, Kazakhstan
Satbayev University, Almaty, Kazakhstan
Karaganda Technical University, Karaganda, Kazakhstan
M.P.Semenenko Institute of Geochemistry, Mineralogy and Ore Formation, National Academy of Sciences of Ukraine, Kyiv, Ukraine
NJSC “Naftogaz of Ukraine”, Kyiv, Ukraine
“Professional Geo Solutions Kazakhstan” LLP
Satbayev University
Karaganda Technical University
M.P.Semenenko Institute of Geochemistry
NJSC “Naftogaz of Ukraine”
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