Characterization of Brazilian tight gas sandstones relating permeability and Angstrom-to micron-scale pore structures

被引：156

作者：

Schmitt, Mayka ^{[1
]}

Fernandes, Celso Peres ^{[1
]}

Wolf, Fabiano G. ^{[2
]}

Bellini da Cunha Neto, Jose A. ^{[1
]}

Rahner, Christoffer P. ^{[1
]}

Santiago dos Santos, Viviane Sampaio ^{[3
]}

机构：

[1] Univ Fed Santa Catarina, Porous Media & Thermophys Properties Lab LMPT, Dept Mech Engn, BR-88040900 Florianopolis, SC, Brazil

[2] Univ Fed Santa Catarina, Mobil Engn Ctr, BR-89219905 Joinville, SC, Brazil

[3] Leopoldo Americo Miguez de Mello Res & Dev Ctr, BR-21947598 Rio De Janeiro, RJ, Brazil

来源：

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING | 2015年 / 27卷

关键词：

Tight gas sandstones; Angstrom-to micron-scale pore structure characterization; Pulse-decay permeability and stress-dependence; Klinkenberg corrections; Nitrogen gas adsorption and mercury intrusion capillary pressure combination; DENSITY-FUNCTIONAL THEORY; SIZE DISTRIBUTION; CAPILLARY-PRESSURE; CARBON-DIOXIDE; ADSORPTION; FLOW; ROCKS; SIMULATIONS; POROSIMETRY; PREDICTION;

D O I：

10.1016/j.jngse.2015.09.027

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This work focuses on the characterization of the overall pore size distribution in tight gas sandstones originating from distinct Brazilian fields, as well as fluid flow circulation described by single-phase permeability. The former was achieved by the combination of nitrogen adsorption and mercury intrusion techniques and the latter estimated by empirical relations validated by the pulse-decay technique. The nature of nitrogen permeability change was investigated on tight gas core samples under a varying effective stress of 2-40 MPa, while the gas slippage was verified shifting mean pore pressures from 8.62 to 2.76 MPa in the laboratory pulse-decay. The best agreements between the estimated and measured permeabilities (from 0.00033 to 0.016 mD and from 0.0004 to 0.034 mD) reveal that obtained overall pore structure' parameters play significant role in the results which were also supported by Field Emission Scanning Electron Microscopy (FESEM) and X-Ray Diffraction (XRD) analysis. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：785 / 807

页数：23

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