contributor author | Yildirim, Levent Taylan Ozgur | |
contributor author | Wang, John | |
contributor author | Elsworth, Derek | |
date accessioned | 2025-04-21T10:38:05Z | |
date available | 2025-04-21T10:38:05Z | |
date copyright | 1/10/2025 12:00:00 AM | |
date issued | 2025 | |
identifier issn | 2998-1638 | |
identifier other | jertb_1_2_021006.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4306591 | |
description abstract | This paper presents a new five-step method to evaluate shale gas formations with intricate pore networks. The method overcomes challenges posed by traditional workflows through an improved workflow and a new unconventional petrophysical model: (a) the new model accurately defines components of shale gas formations, including effective and isolated pores occupied by free and adsorbed gas; (b) total organic carbon (TOC) is evaluated using three techniques using conventional well logs to determine which techniques are more accurate; and (c) the improved method provides integrated evaluation of geomechanical properties, resources in place, and selection of stimulation candidate. Our field case study on Marcellus shale shows that (a) density-based TOC technique is more accurate and average TOC in the study area is 2.8%; (b) density porosity model is more reliable and average porosity in the study area is 8.5%. Positive correlation between TOCs and porosities in the upper and lower Marcellus suggests that effective pores contribute more significantly to the pore network than isolated pores; (c) gas in place is 120 Bcf with 60% free gas for a drilling unit of 640 acres. Large contrasts in Young's modulus (1 million psi) and minimum in situ stress (893 psi) along the upper Marcellus-Stafford limestone boundary, and resistivity separations in the lower Marcellus member, show that the upper Marcellus is a good stimulation candidate. This method and field case study provide valuable insights to evaluate Marcellus shale reservoirs and improve economic recovery of the resources in place. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | A New Five-step Method for Advanced Evaluation of Shale Gas Formations and a Field Case Study of Marcellus Shale | |
type | Journal Paper | |
journal volume | 1 | |
journal issue | 2 | |
journal title | Journal of Energy Resources Technology, Part B: Subsurface Energy and Carbon Capture | |
identifier doi | 10.1115/1.4066417 | |
journal fristpage | 21006-1 | |
journal lastpage | 21006-12 | |
page | 12 | |
tree | Journal of Energy Resources Technology, Part B: Subsurface Energy and Carbon Capture:;2025:;volume( 001 ):;issue: 002 | |
contenttype | Fulltext | |