Prediction Method Optimization for S-wave in Mahu Area and Its Influence on Calculation of Rock Mechanics Parameters

doi:10.3969/j.issn.1006-6535.2021.03.002

Abstract

Abstract: In view of the absence of S-wave velocity, an important geophysical parameter and the low accuracy of empirical formula in actual production, taking the Mahu area as an example, the Xu-White model was finally selected by screening and analyzing the theoretical model of S-wave prediction, the geological depositional setting and burial depth were considered, S-wave velocity curve was calculated according to mineral composition, porosity and fluid composition curves, and the influence of the accuracy of S-wave velocity prediction on the calculation results of rock mechanics parameters was studied. After verification with measured dipole acoustic data, indoor core mechanical measurement data, and fracturing operation data, compared with the results calculated by conventional empirical formula, the accuracy of Xu-White model was greatly improved. The model was generally applicable to the glutenite stratum in the Baikouquan Formation, Mahu area. This technology has proven to be highly effective in the accurate calculation of rock mechanics parameters and the fracturing scheme design of glutenite tight oil reservoir. It is of great significance to the study on the geology-engineering integration in the development of tight oil in Mahu area.

Key words: S-wave prediction, rock mechanics parameters, acoustic logging, Xu-White model, tight oil, Mahu Area

CLC Number:

TE21

Wu Shunwei, Gao Yang, Hu Jun, Hu Haisheng, He Jinyu, Wang Gang. Prediction Method Optimization for S-wave in Mahu Area and Its Influence on Calculation of Rock Mechanics Parameters[J]. Special Oil & Gas Reservoirs, 2021, 28(3): 9-14.

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