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Title: Field tests of a new 2 MHz resistivity tool for slimhole formation-evaluation while drilling

Abstract

A new 2 MHz resistivity tool for logging-while-drilling (LWD) in slim holes has been developed and field-tested. The Slim Compensated Wave Resistivity (SCWR) provides four formation-evaluation resistivity measurements in all mud types and in boreholes as small as 5-7/8 inches. Dual transmitter-receiver spacings measuring both phase and attenuation produce four resistivities, sufficient to determine formation resistivity and evaluate invasion. Since many slim holes are drilled in lower-porosity reservoirs, where pay-zone resistivities are often higher than 20 ohm-m, the SCWR tool was designed to provide improved measurement accuracy at these higher resistivities. Similarly, slim holes tend to be hotter than larger boreholes, and the symmetrical design of the SCWR antenna array provides excellent temperature stability. Finally, slim holes are often associated with medium-radius drilling, so the SCWR tool was designed to operate reliably in wells with bends as great as 19{degrees}/100ft (rotating) or 36{degrees}/100ft (sliding). Field tests have been conducted in a wide range of formation types and drilling conditions. These tests have been used to refine the mechanical design and antenna array, and have confirmed both measurement quality and reliability. This paper describes the features and capabilities of the SCWR tool, and presents several log examples from the field tests.

Authors:
; ;  [1]
  1. and others
Publication Date:
OSTI Identifier:
207257
Report Number(s):
CONF-951002-
TRN: 96:000704-0016
Resource Type:
Conference
Resource Relation:
Conference: Annual meeting of the Society of Petroleum Engineers (SPE), Dallas, TX (United States), 22-25 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of Formation evaluation and reservoir geology. 1995 SPE annual technical conference and exhibition; PB: 1010 p.
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; OIL WELLS; MWD SYSTEMS; RESISTIVITY LOGGING; ELECTRICAL EQUIPMENT; PERFORMANCE; OIL FIELDS; FIELD TESTS

Citation Formats

Heysse, D R, Jackson, C E, and Merchant, G A. Field tests of a new 2 MHz resistivity tool for slimhole formation-evaluation while drilling. United States: N. p., 1995. Web.
Heysse, D R, Jackson, C E, & Merchant, G A. Field tests of a new 2 MHz resistivity tool for slimhole formation-evaluation while drilling. United States.
Heysse, D R, Jackson, C E, and Merchant, G A. 1995. "Field tests of a new 2 MHz resistivity tool for slimhole formation-evaluation while drilling". United States.
@article{osti_207257,
title = {Field tests of a new 2 MHz resistivity tool for slimhole formation-evaluation while drilling},
author = {Heysse, D R and Jackson, C E and Merchant, G A},
abstractNote = {A new 2 MHz resistivity tool for logging-while-drilling (LWD) in slim holes has been developed and field-tested. The Slim Compensated Wave Resistivity (SCWR) provides four formation-evaluation resistivity measurements in all mud types and in boreholes as small as 5-7/8 inches. Dual transmitter-receiver spacings measuring both phase and attenuation produce four resistivities, sufficient to determine formation resistivity and evaluate invasion. Since many slim holes are drilled in lower-porosity reservoirs, where pay-zone resistivities are often higher than 20 ohm-m, the SCWR tool was designed to provide improved measurement accuracy at these higher resistivities. Similarly, slim holes tend to be hotter than larger boreholes, and the symmetrical design of the SCWR antenna array provides excellent temperature stability. Finally, slim holes are often associated with medium-radius drilling, so the SCWR tool was designed to operate reliably in wells with bends as great as 19{degrees}/100ft (rotating) or 36{degrees}/100ft (sliding). Field tests have been conducted in a wide range of formation types and drilling conditions. These tests have been used to refine the mechanical design and antenna array, and have confirmed both measurement quality and reliability. This paper describes the features and capabilities of the SCWR tool, and presents several log examples from the field tests.},
doi = {},
url = {https://www.osti.gov/biblio/207257}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 31 00:00:00 EST 1995},
month = {Sun Dec 31 00:00:00 EST 1995}
}

Conference:
Other availability
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