Prediction of water saturation in a tight gas sandstone reservoir by using four intelligent methods: a comparative study

2016 ◽  
Vol 30 (4) ◽  
pp. 1171-1185 ◽  
Author(s):  
Sadegh Baziar ◽  
Habibollah Bavarsad Shahripour ◽  
Mehdi Tadayoni ◽  
Majid Nabi-Bidhendi
Keyword(s):  
Comparative Study ◽  
Water Saturation ◽  
Tight Gas ◽  
Sandstone Reservoir ◽  
Intelligent Methods ◽  
Tight Gas Sandstone

A new method of multi-scale fracture identification in tight gas sandstone reservoir

2018 ◽  
Vol 22 (2) ◽  
pp. 112-118
Author(s):  
Tao Wu ◽  
Yuezhi Wang ◽  
Bin Fu ◽  
Peng Wu
Keyword(s):  
New Method ◽  
Tight Gas ◽  
Multi Scale ◽  
Sandstone Reservoir ◽  
Fracture Identification ◽  
Tight Gas Sandstone

Rock Physics and AVO Modeling of Tight Gas Sandstone Reservoir

2021 ◽  
Author(s):  
V. Suleymanov ◽  
G. Glatz ◽  
J. Dvorkin
Keyword(s):  
Rock Physics ◽  
Tight Gas ◽  
Sandstone Reservoir ◽  
Tight Gas Sandstone

Porosity model and its application in tight gas sandstone reservoir in the southern part of West Depression, Liaohe Basin, China

2016 ◽  
Vol 141 ◽  
pp. 24-37 ◽  
Author(s):  
Wei Wei ◽  
Xiaomin Zhu ◽  
Yuanlin Meng ◽  
Lihua Xiao ◽  
Mengge Xue ◽  
...  
Keyword(s):  
Tight Gas ◽  
Liaohe Basin ◽  
Sandstone Reservoir ◽  
Porosity Model ◽  
Tight Gas Sandstone

Critical evaluation of an Upper Carboniferous tight gas sandstone reservoir analog: Diagenesis and petrophysical aspects

2017 ◽  
Vol 86 ◽  
pp. 689-710 ◽  
Author(s):  
Patrick Wüstefeld ◽  
Ulrike Hilse ◽  
Bastian Koehrer ◽  
Dirk Adelmann ◽  
Christoph Hilgers
Keyword(s):  
Critical Evaluation ◽  
Tight Gas ◽  
Upper Carboniferous ◽  
Sandstone Reservoir ◽  
Tight Gas Sandstone

Rock quality assessment using the effect of mud-filtrate invasion on conflicting borehole resistivity measurements

Geophysics ◽  
2012 ◽  
Vol 77 (3) ◽  
pp. WA65-WA78 ◽  
Author(s):  
Jesús M. Salazar ◽  
A. Jeff Martin
Keyword(s):  
Wettability Alteration ◽  
Rock Properties ◽  
High Resistivity ◽  
Tight Gas ◽  
Resistivity Measurements ◽  
Rock Quality ◽  
Sandstone Reservoir ◽  
The Difference ◽  
Mud Filtrate ◽  
Tight Gas Sandstone

Unexpected borehole measurements are often inaccurately interpreted due to limited knowledge of the formation, particularly in tight-gas unconventional reservoirs. A novel method was applied to determine reservoir quality and the reliability of borehole array-induction resistivity measurements in a tight gas sandstone reservoir. Four exploration wells drilled with synthetic oil-based mud showed conflicting resistivity profiles. The discovery well showed a conductive invasion profile, but the appraisal wells showed resistive profiles. Simulation of oil-based mud-filtrate invasion was coupled with forward simulation and inversion of array-induction resistivity measurements to determine the difference in such resistivity profiles. Laboratory measurements on rock core and fluid samples were used to calibrate a log-based petrophysical model that was necessary to simulate the physics of fluid-flow mud-filtrate invasion. The dynamic process of invasion was simulated with a multicomponent formulation for the hydrocarbon phase and rock wettability alteration effects due to surfactants present in the mud. Simulated borehole-resistivity measurements were compared to field logs, and the rock properties were modified to secure a close agreement between simulated and field logs. The different invasion profiles corresponded to variable rock quality and mud composition. In the discovery well, good rock quality and thick surfactants in the mud caused a low mobility ratio between filtrate and native fluids, which created a water bank that moved ahead into the formation. This effect created a conductive annulus in the near-wellbore region. In turn, the deep invasion and high resistivity are due to excellent rock quality that is typical of a conventional sandstone reservoir. The shallower invasion and resistive profiles in the delineation wells suggest the tight gas sandstone reservoir we expected to find throughout the formation.

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