An impedance inversion method based on wavelet energy balancing

Abstract The anisotropic total variation with overlapping group sparsity (ATV_OGS) regularisation term is an improvement on the anisotropic total variation (ATV) regularisation term. It has been employed successfully in seismic impedance inversion as it can enhance the boundary information and relieve the staircase effect by exploring the structured sparsity of seismic impedance. However, because ATV_OGS constrains only the structured sparsity of the impedance's first-order difference and ignores the structured sparsity of the second-order difference, the staircase effect still occurs in an inversion result based on ATV_OGS. To further fit the structured sparsity of the impedance's second-order gradients, we introduce the overlapping group sparsity into the second-order difference of the impedance and propose a novel second-order ATV with overlapping group sparsity (SATV_OGS) seismic impedance inversion method. The proposed method reduces the interference of the large amplitude noise and further mitigates the staircase effect of the ATV_OGS. Furthermore, the accelerated alternating direction method of multipliers (A-ADMM) framework applied to this novel method. It can increase the efficiency of inversion. The experiments are carried out on a general model data and field data. Based on the experimental results, the proposed method can obtain higher resolution impedance than some impedance inversion methods based on total variation.

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A Constrained Impedance Inversion Method Controlling by Regularized Parameters

Chinese Journal of Geophysics ◽

10.1002/cjg2.439 ◽

2003 ◽

Vol 46 (6) ◽

pp. 1186-1195 ◽

Cited By ~ 6

Author(s):

Hongbing ZHANG ◽

Changchun YANG

Keyword(s):

Inversion Method ◽

Impedance Inversion

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Wave Impedance Inversion Method and Image Examples of the Objective Layer Between the Casing and the Formation

Chinese Journal of Geophysics ◽

10.1002/cjg2.745 ◽

2005 ◽

Vol 48 (4) ◽

pp. 1032-1042 ◽

Cited By ~ 1

Author(s):

Gui-Jin YAO ◽

Ke-Xie WANG ◽

Xian-Yun WU ◽

Qu-Ming Qiang

Keyword(s):

Wave Impedance ◽

Inversion Method ◽

Impedance Inversion

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Metode Inversi AVO Simultan untuk Mengetahui Sebaran Hidrokarbon Formasi Baturaja, Lapangan "Wine”, Cekungan Sumatra Selatan

Jurnal Offshore: Oil, Production Facilities and Renewable Energy ◽

10.30588/jo.v1i1.239 ◽

2017 ◽

Vol 1 (1) ◽

pp. 26

Author(s):

Anastasia Neni Candra Purnamasari

Keyword(s):

Seismic Data ◽

Inversion Method ◽

3D Seismic ◽

Inversion Process ◽

Avo Inversion ◽

Prestack Inversion ◽

Impedance Inversion ◽

Hydrocarbon Distribution ◽

3D Seismic Data ◽

Range Of Values

Data seismik 3D (CDP gather) pada daerah penelitian dilakukan proses inversi prestack yaitu inversi AVO simultan untuk mengetahui sebaran hidrokarbon. Data seismik 3D terbentang dengan jangkauan inline 1003-1302 dan xline 5002-5300. Metode inversi AVO simultan dilakukan dengan data masukan berupa angle stack yang diinversi secara bersama-sama (simultan) untuk menghasilkan impedansi-P, impedansi-S dan densitas. Dari hasil inversi impedansi-P dan inversi impedansi-S didapatkan nilai lambda-rho dan mu-rho sebagai hasil turunannya. Kisaran nilai hasil inversi impedansi-P, impedansi-S, densitas, lambda-rho dan mu-rho pada porous limestone formasi Baturaja yaitu nilai impedansi-P sekitar 11000-13500 m/s*g/cc, nilai impedansi-S sekitar 6500-7400 m/s*g/cc, nilai densitas sekitar 2,52-2,6 g/cc, nilai lambda-rho sekitar 36-70 Gpa*g/cc dan nilai mu-rho sekitar 41-59 Gpa*g/cc. Berdasarkan map slice hasil inversi impedansi-P, map slice hasil inversi impedansi-S, map slice hasil inversi densitas, map slice hasil inversi lambda-rho dan map slice hasil inversi mu-rho dapat diketahui area persebaran hidrokarbon pada formasi Baturaja. Persebaran hidrokarbon berada di sekitar sumur TT.3D seismic data (CDP gather) in the study area was carried out a prestack inversion process, namely simultaneous AVO inversion to determine the distribution of hydrocarbons. 3D seismic data stretches with inline range 1003-1302 and xline 5002-5300. Simultaneous AVO inversion method is done with input data in the form of angle stack which is inverted together (simultaneously) to produce P-impedance, S-impedance and density. From the results of P-impedance inversion and S-impedance inversion, the values of lambda-rho and mu-rho are derived as a result of their derivatives. The range of values of P-impedance inversion, S-impedance, density, lambda-rho and mu-rho in porous limestone formation i.e. the P-impedance value around 11000-13500 m/s*g/cc, the S-impedance value around 6500-7400 m/s*g/cc, the density value around 2.52-2.6 g/cc, the lambda-value rho around 36-70 Gpa*g/cc and your value around 41-59 Gpa*g/cc. Based on the P-impedance inversion map slice, S-impedance inversion map slice, density inversion map slice, lambda-rho inversion map slice and mu-rho inversion map slice can be known the area of hydrocarbon distribution in the Baturaja formation. Hydrocarbon spread is around the TT well.

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