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Title: TDT monitors gas saturation in heterogeneous reservoir

Abstract

Thermal decay time (TDT) logs were used for determining the gas/oil contact in wells in the Zeit Bay field in Egypt. Gas/oil contact in the field was revised using the results from the model that was developed. The analysis followed the Polyachenko model of functional relationship between count rates and gas saturation. Several crossplots were made for the same range of porosity and connate water saturation. These crossplots included: formation capture cross section; total selected near detector counts; total selected far detector counts; capture cross section of the borehole; and inelastic far detector counts. Each crossplot gave a definite diagnostic shape around the depth of the gas/oil contact. By using these crossplots, it is possible to calculate gas saturation from a stand-alone run. The model was validated by RFT (reservoir formation tester) and open hole log data from infill wells. Also, the analysis was successfully applied in wells without an ambiguous gas/oil contact.

Authors:
;  [1]
  1. King Saud Univ., Riyadh (Saudi Arabia)
Publication Date:
OSTI Identifier:
605803
Resource Type:
Journal Article
Journal Name:
Oil and Gas Journal
Additional Journal Information:
Journal Volume: 96; Journal Issue: 21; Other Information: PBD: 25 May 1998
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; 02 PETROLEUM; GAS SATURATION; NEUTRON-GAMMA LOGGING; OIL FIELDS; ASSOCIATED GAS; GAS INJECTION; ENHANCED RECOVERY; GEOLOGIC MODELS

Citation Formats

Hamada, G M, and Al-Awad, M N.J. TDT monitors gas saturation in heterogeneous reservoir. United States: N. p., 1998. Web.
Hamada, G M, & Al-Awad, M N.J. TDT monitors gas saturation in heterogeneous reservoir. United States.
Hamada, G M, and Al-Awad, M N.J. 1998. "TDT monitors gas saturation in heterogeneous reservoir". United States.
@article{osti_605803,
title = {TDT monitors gas saturation in heterogeneous reservoir},
author = {Hamada, G M and Al-Awad, M N.J.},
abstractNote = {Thermal decay time (TDT) logs were used for determining the gas/oil contact in wells in the Zeit Bay field in Egypt. Gas/oil contact in the field was revised using the results from the model that was developed. The analysis followed the Polyachenko model of functional relationship between count rates and gas saturation. Several crossplots were made for the same range of porosity and connate water saturation. These crossplots included: formation capture cross section; total selected near detector counts; total selected far detector counts; capture cross section of the borehole; and inelastic far detector counts. Each crossplot gave a definite diagnostic shape around the depth of the gas/oil contact. By using these crossplots, it is possible to calculate gas saturation from a stand-alone run. The model was validated by RFT (reservoir formation tester) and open hole log data from infill wells. Also, the analysis was successfully applied in wells without an ambiguous gas/oil contact.},
doi = {},
url = {https://www.osti.gov/biblio/605803}, journal = {Oil and Gas Journal},
number = 21,
volume = 96,
place = {United States},
year = {Mon May 25 00:00:00 EDT 1998},
month = {Mon May 25 00:00:00 EDT 1998}
}