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Title: Controls on reservoir properties in organic-matter-rich shales: Insights from MICP analysis

Abstract

Mercury injection capillary pressure (MICP) analysis was used to study organic-matter-rich Devonian shales varying in maturity from marginally mature to postmature to discuss controls on drainage and imbibition in shale reservoirs. Six samples come from the New Albany Shale; their total organic carbon (TOC) ranged from 3.3–8.4 % and vitrinite reflectance (Ro) from 0.54–1.42 %. One Marcellus Shale sample with Ro 2.50 % was used to extend the maturity range to the advanced dry gas window. Three coal samples of varying rank were also included for comparison. Porosity of the shales ranges from 1.5–5.0 %, and MICP-derived permeability ranges from 0.17–9.9 mD. Injection capillary pressure curves have a range of entry pressures from 0.055 to0.421 MPa, and no relationship of entry pressure with maturity was revealed. Maturity, however, has an influence on pore size distribution, with the higher-maturity samples having significantly lower volumes of pores with throats less than 10 nm in diameter. Withdrawal capillary pressure curves document a wide range of withdrawal efficiencies from 55 % to almost 100 %, and pores having throats between 3–50 nm in diameter play a major role in the ability of mercury to be released from the pore system. The obtained data providemore » valuable information about shale properties and their behavior not only in the air-mercury system but also under reservoir conditions.« less

Authors:
 [1];  [1];  [2]
  1. Indiana Univ., Bloomington, IN (United States). Indiana Geological and Water Survey
  2. Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research
Publication Date:
Research Org.:
Indiana Univ., Bloomington, IN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
OSTI Identifier:
1657074
Alternate Identifier(s):
OSTI ID: 1650704
Grant/Contract Number:  
SC0006978
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Petroleum Science and Engineering
Additional Journal Information:
Journal Volume: 196; Journal ID: ISSN 0920-4105
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; shale; reservoir properties; MICP; maturity; withdrawal efficiency

Citation Formats

Mastalerz, Maria, Drobniak, Agnieszka, and Hower, James C. Controls on reservoir properties in organic-matter-rich shales: Insights from MICP analysis. United States: N. p., 2020. Web. https://doi.org/10.1016/j.petrol.2020.107775.
Mastalerz, Maria, Drobniak, Agnieszka, & Hower, James C. Controls on reservoir properties in organic-matter-rich shales: Insights from MICP analysis. United States. https://doi.org/10.1016/j.petrol.2020.107775
Mastalerz, Maria, Drobniak, Agnieszka, and Hower, James C. Fri . "Controls on reservoir properties in organic-matter-rich shales: Insights from MICP analysis". United States. https://doi.org/10.1016/j.petrol.2020.107775.
@article{osti_1657074,
title = {Controls on reservoir properties in organic-matter-rich shales: Insights from MICP analysis},
author = {Mastalerz, Maria and Drobniak, Agnieszka and Hower, James C.},
abstractNote = {Mercury injection capillary pressure (MICP) analysis was used to study organic-matter-rich Devonian shales varying in maturity from marginally mature to postmature to discuss controls on drainage and imbibition in shale reservoirs. Six samples come from the New Albany Shale; their total organic carbon (TOC) ranged from 3.3–8.4 % and vitrinite reflectance (Ro) from 0.54–1.42 %. One Marcellus Shale sample with Ro 2.50 % was used to extend the maturity range to the advanced dry gas window. Three coal samples of varying rank were also included for comparison. Porosity of the shales ranges from 1.5–5.0 %, and MICP-derived permeability ranges from 0.17–9.9 mD. Injection capillary pressure curves have a range of entry pressures from 0.055 to0.421 MPa, and no relationship of entry pressure with maturity was revealed. Maturity, however, has an influence on pore size distribution, with the higher-maturity samples having significantly lower volumes of pores with throats less than 10 nm in diameter. Withdrawal capillary pressure curves document a wide range of withdrawal efficiencies from 55 % to almost 100 %, and pores having throats between 3–50 nm in diameter play a major role in the ability of mercury to be released from the pore system. The obtained data provide valuable information about shale properties and their behavior not only in the air-mercury system but also under reservoir conditions.},
doi = {10.1016/j.petrol.2020.107775},
journal = {Journal of Petroleum Science and Engineering},
number = ,
volume = 196,
place = {United States},
year = {2020},
month = {8}
}

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