Poisson impedance analysis to identify sweet spot shale gas reservoir in field "x"

Rika Anggreini Hutahaean, Mohammad Syamsu Rosid, John Guntoro, Haryo Ajie

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The separation process of lithology and fluid reservoirs is an important part of characterizing the hydrocarbon reservoir; in this case the reservoir also acts as the source rock. Reservoir characterization involved identification of both lithology and fluid content of reservoir. As field "X" reservoir has no clean formation, using acoustic impedance parameters it is hard to identify clearly. It still has a high ambiguity. In impure reservoir formation, crossplots of Acoustic Impedance (AI) and Shear Impedance (SI) could not separate the lithology as well as fluid content clearly. Poisson Impedance (PI) has been implemented to solve the problem. The AI - SI crossplot is rotated to get the lithology-fluid trend which is associated to an equation of PI (c) = AI - c SI. The accuracy of the PI value depends on the value of c (optimization factor of rotation). Therefore, the c value was calculated through the TCCA (Target Correlation Coefficient Analysis) method. Analysis of sensitivity c parameter was performed in the well of field "X." The parameters of Zp, Zs and density are obtained from simultaneous inversion. PI models able to show clearly the separation of rock lithology as well as gas content of reservoir. Lithology impedance (LI) as a result of the PI-GR correlation is able to separate sand and shale very well. Also, from the PI-SW correlation the hydrocarbon content is very well separately identified. The hydrocarbon zone was shown to be 3150-3260 m depth.

Original languageEnglish
Title of host publication8th Annual Basic Science International Conference
Subtitle of host publicationCoverage of Basic Sciences toward the World's Sustainability Challenges
EditorsCorina Karim, Rodliyati Azrianingsih, Mauludi Ariesto Pamungkas, Yoga Dwi Jatmiko, Anna Safitri
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735417397
DOIs
Publication statusPublished - 17 Oct 2018
Event8th Annual Basic Science International Conference: Coverage of Basic Sciences toward the World's Sustainability Challanges, BaSIC 2018 - Malang, East Java, Indonesia
Duration: 6 Mar 20187 Mar 2018

Publication series

NameAIP Conference Proceedings
Volume2021
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference8th Annual Basic Science International Conference: Coverage of Basic Sciences toward the World's Sustainability Challanges, BaSIC 2018
CountryIndonesia
CityMalang, East Java
Period6/03/187/03/18

Keywords

  • poisson impedance
  • reservoir characterization
  • shale gas
  • TCCA

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