An Estimation Method of Pore Structure and Mineral Moduli Based on Kuster–Toksöz (KT) Model and Biot’s Coefficient

• Autorzy: Peng D. , Yin C. , Zhao H. , Liu W.

Identyfikatory

DOI

10.1515/acgeo-2016-0108

• Języki publikacji: EN

Abstrakty

EN

Pore structure and mineral matrix elastic moduli are indispensable in rock physics models. We propose an estimation method of pore structure and mineral moduli based on Kuster-Toksöz model and Biot’s coefficient. In this technique, pore aspect ratios of five different scales from 100 to 10^-4 are considered, Biot’s coefficient is used to determine bounds of mineral moduli, and an estimation procedure combined with simulated annealing (SA) algorithm to handle real logs or laboratory measurements is developed. The proposed method is applied to parameter estimations on 28 sandstone samples, the properties of which have been measured in lab. The water saturated data are used for estimating pore structure and mineral moduli, and the oil saturated data are used for testing these estimated parameters through fluid substitution in Kuster–Toksöz model. We then compare fluid substitution results with lab measurements and find that relative errors of P-wave and S-wave velocities are all less than 5%, which indicates that the estimation results are accurate.

Słowa kluczowe

EN

rock physics; Kuster–Toksöz model; mineral matrix; pore structure; pore aspect ratios spectrum

PL

fizyka skał; model Kustera-Toksöza; matryca mineralna; struktura porowata

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2016
• Tom: Vol. 64, no. 6
• Strony: 2337--2355
• Opis fizyczny: Bibliogr. 38 poz.

Twórcy

autor

Peng D.

• Southwest Petroleum University, Sichuan Province Key Laboratory of Natural Gas Geology, School of Geoscience and Technology,Chengdu, China

autor

Yin C.

• Southwest Petroleum University, Sichuan Province Key Laboratory of Natural Gas Geology, School of Geoscience and Technology,Chengdu, China

autor

Zhao H.

• Southwest Petroleum University, Sichuan Province Key Laboratory of Natural Gas Geology, School of Geoscience and Technology,Chengdu, China

autor

Liu W.

• Southwest Petroleum University, Sichuan Province Key Laboratory of Natural Gas Geology, School of Geoscience and Technology,Chengdu, China

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)