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- Title
基于岩石物理分析的相控叠前反演技术在铝土岩 储层预测中的应用 ——以鄂尔多斯盆地庆城井区为例.
- Authors
佘钰蔚; 张盟勃; 王永刚; 张 瑶; 李 斐; 瞿 长; 吴 越
- Abstract
The bauxite reservoir is locally enriched, the reservoir is thin and fast changing, and the double strong reflection interface of top and bottom has strong shielding effect, so the quantitative prediction of seismic effective reservoir is difficult. In this paper, the sensitive parameters of bauxite lithology and gas bearing are defined for the first time by comparing the results of core testing and logging. On the basis of shear wave prediction, the spatial distribution of bauxite reservoir is described by phase controlled pre-stack geostatistics inversion, which solves the difficult problem of effective thin reservoir identification. The results show that:(1) On the basis of rock mechanics and ultrasonic test results, the lithology sensitivity factor R is proposed. And it evaluated that shear impedance is a sensitive parameter indicating the lithology of bauxite rock. This conclusion is consistent with the result of logging intersection analysis. (2)The saturation test results show that Poisson's ratio is a sensitive parameter indicating the gas bearing property of bauxite rock. (3)The results of pre-stack geostatistical in⁃ version show that shear impedance is more sensitive than p-wave impedance to identify high-quality bauxite rocks and Poisson's ratio can distinguish well between bauxite rock dry layer and gas layer. The inversion results are in good agreement with the verification wells, which helps the high drilling rate of the first bauxite horizontal well. The gas test results of this horizontal well refresh the record of Upper Paleozoic gas test in the Ordos Basin.
- Subjects
POISSON'S ratio; GAS-lubricated bearings; ULTRASONIC testing; ROCK mechanics; BAUXITE
- Publication
Natural Gas Geoscience, 2024, Vol 35, Issue 8, p1432
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2024.05.001