利用碳酸盐孔隙类型改善孔隙-速度关系

Q1 Mathematics Journal of Computational Acoustics Pub Date : 2015-12-01 DOI:10.1142/S0218396X15400068

Tingting Zhang, Yuefeng Sun, Qifeng Dou, Hanrong Zhang, T. Guo, Xiyuan Cai

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引用次数: 4

摘要

碳酸盐岩的声阻抗受孔隙度、孔隙结构/裂缝、流体含量和岩性等因素的影响。碳酸盐岩中由于成岩作用而形成的模状和孔洞型孔隙、裂缝等孔隙结构，使阻抗与孔隙度的关系变得十分复杂。利用基于孔隙弹性模型的框架弹性因子(γ)表征储层孔隙结构，我们发现其与孔隙度的积与声速(Vp = a−B∗φ γ)和声阻抗(AI = C−D∗φ γ)的相关性更好，其中a、B、C和D分别为6.60、0.03、18.3和0.09，本文研究的深层低孔隙度碳酸盐岩储层。这些新的关系也可以用于改善其他类似环境下超深层油气储层的地震反演。

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Improving Porosity–Velocity Relationships Using Carbonate Pore Types

Acoustic impedance in carbonates is influenced by factors such as porosity, pore structure/fracture, fluid content, and lithology. Occurrence of moldic and vuggy pores, fractures and other pore structures due to diagenesis in carbonate rocks can greatly complicate the relationships between impedance and porosity. Using a frame flexibility factor (γ) derived from a poroelastic model to characterize pore structure in reservoir rocks, we find that its product with porosity can result in a much better correlation with sonic velocity (Vp = A − B ∗ ϕ ∗ γ) and acoustic impedance (AI = C − D ∗ ϕ ∗ γ), where A, B, C and D is 6.60, 0.03, 18.3 and 0.09, respectively for the deep low-porosity carbonate reservoir studied in this paper. These new relationships can also be useful in improving seismic inversion of ultra-deep hydrocarbon reservoirs in other similar environments.

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来源期刊

Journal of Computational Acoustics 物理-声学

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Currently known as Journal of Theoretical and Computational Acoustics (JTCA).The aim of this journal is to provide an international forum for the dissemination of the state-of-the-art information in the field of Computational Acoustics. Topics covered by this journal include research and tutorial contributions in OCEAN ACOUSTICS (a subject of active research in relation with sonar detection and the design of noiseless ships), SEISMO-ACOUSTICS (of concern to earthquake science and engineering, and also to those doing underground prospection like searching for petroleum), AEROACOUSTICS (which includes the analysis of noise created by aircraft), COMPUTATIONAL METHODS, and SUPERCOMPUTING. In addition to the traditional issues and problems in computational methods, the journal also considers theoretical research acoustics papers which lead to large-scale scientific computations. The journal strives to be flexible in the type of high quality papers it publishes and their format. Equally desirable are Full papers, which should be complete and relatively self-contained original contributions with an introduction that can be understood by the broad computational acoustics community. Both rigorous and heuristic styles are acceptable. Of particular interest are papers about new areas of research in which other than strictly computational arguments may be important in establishing a basis for further developments. Tutorial review papers, covering some of the important issues in Computational Mathematical Methods, Scientific Computing, and their applications. Short notes, which present specific new results and techniques in a brief communication. The journal will occasionally publish significant contributions which are larger than the usual format for regular papers. Special issues which report results of high quality workshops in related areas and monographs of significant contributions in the Series of Computational Acoustics will also be published.