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Characterization of shallow-marine reservoirs of Lower Eocene carbonates, Pakistan: Continuous wavelet transforms-based spectral decomposition
Gas Science and Engineering Pub Date : 2018-08-01 , DOI: 10.1016/j.jngse.2018.06.010
Muhammad Tayyab Naseer , Shazia Asim

Abstract Seismic qualities expect an energetic part in the Carbonate reservoir portrayal. The precise streamlining of seismic characteristics for predicting the porosity and fractures of thin-bedded carbonate reservoir is the contest for prospect development. The continuous wavelet transforms (CWT) of spectral decomposition (SD) tool is applied for prediction of porous reservoirs within the Sui Main Limestone (SML) Formation, SW Pakistan. The seismic and absolute average amplitudes depict the potential lithology and fractures inside the incomplete reservoir degree. However, the CWT detects the lateral distribution of reservoir lithology, fault system, and dense fracture network within the complete carbonate reservoir system at 22 Hz, 37 Hz, and 48 Hz. The synthetic wedge model settles a 33 m thick limestone bed. The conventional porosity model settles a high-quality (about 20% porosity) lenticular limestone lens, which affirms the implications for gas-bearing stratigraphic traps. The spectrally decomposed acoustic impedance-based porosity models at 28 Hz, 37 Hz, and 48 Hz substantiate the lenticular reservoirs inside the 15–30% porosity.

中文翻译:

巴基斯坦下始新世碳酸盐浅海储层特征:基于连续小波变换的光谱分解

摘要 地震质量在碳酸盐岩储层描述中期待着一个充满活力的部分。预测薄层碳酸盐岩储层孔隙度和裂缝的精确地震特征流线化​​是前景开发的较量。谱分解 (SD) 工具的连续小波变换 (CWT) 用于预测巴基斯坦西南部隋主石灰岩 (SML) 组内的多孔储层。地震和绝对平均振幅描述了不完全储层内部潜在的岩性和裂缝。然而,CWT 在 22 Hz、37 Hz 和 48 Hz 下检测完整碳酸盐岩储层系统内储层岩性、断层系统和致密裂缝网络的横向分布。合成楔形模型固定 33 m 厚的石灰岩床。常规孔隙度模型确定了高质量(约 20% 孔隙度)透镜状石灰岩透镜体,这肯定了对含气地层圈闭的影响。基于 28 Hz、37 Hz 和 48 Hz 的频谱分解声阻抗孔隙度模型证实了 15-30% 孔隙度内的透镜状储层。
更新日期:2018-08-01
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