Wireline technique finds more gas pay in thin, shaly sands

Journal Article · Wed May 01 04:00:00 EDT 1996 · Petroleum Engineer International

OSTI ID:390116

Olesen, J R ^[1]

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1. Schlumberger Wireline and Testing, Beijing (China)

An integrated wellsite logging system has been developed to assess difficult-to evaluate formations, such as thin, gas-bearing intervals in shaly or silty sand. By combining density, neutron porosity and natural gamma ray spectrometry evaluations with an array of formation resistivities, more accurate indications of net pay are obtained at the well site. The technique eliminates the need for a sophisticated evaluation process or inputs from highly trained log analysts, despite the historic difficulty of evaluating thin, shaly gas sands. Wellsite geologists gain a quick estimate of total net pay, from which the economic potential of a well is derived. Once overlooked or underrated gas pay zones are now being added to proven reserves.

• OSTI ID: 390116
• Journal Information: Petroleum Engineer International, Journal Name: Petroleum Engineer International Journal Issue: 5 Vol. 69; ISSN 0164-8322; ISSN PEEID4
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
ACCURACY
DATA ANALYSIS
NATURAL GAS WELLS
OIL WELLS
PERFORMANCE
RADIOACTIVITY LOGGING
WELL LOGGING EQUIPMENT