Naslov
Challenges in electronic instrumentation for inductive rock resistivity measurement through well casing

Autori
Vasić, Darko ; Bilas, Vedran

Izvornik
Naftaplin : znanstveno-stručno glasilo Hrvatske udruge naftnih inženjera i geologa (1330-2434) 56 (2010), 2; 85-93

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, stručni

Ključne riječi
electronic instrumentation; inductive measurements; rock resistivity; cased hole; bypassed oil

Sažetak
Existing cased wells are being recently reevaluated in order to discover potential oil and gas bypassed during well construction and casing. Bypassing hydrocarbon-bearing layers during the casing of the borehole can later in production result in recovering as low as 20% of estimated original oil in place. Well casings prevent use of traditional open-hole formation evaluation techniques. As a consequence, it is necessary to develop new methods and accompanied electronic instrumentation for reevaluation of the cased wells. Rock resistivity measurement methods are of special interest as a cornerstone of open-hole formation evaluation. Through casing resistivity tools based on contact measurement have been developed and commercialized, whereas the cased-hole application of inductive principle is still in research or early prototyping phase. In this paper we provide an overview of the electrical methods for resistivity measurement in a cased hole and discuss challenges, requirements and limits in electronic instrumentation for inductive resistivity measurement from within a single cased well.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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