A conventional log evaluation method for detection of lithology and hydrocarbons in the Danish North Sea well M-1x

Kirsten Lieberkind

doi:10.22008/gpub/38270

A conventional log evaluation method for detection of lithology and hydrocarbons in the Danish North Sea well M-1x

Kirsten Lieberkind

Research output: Chapter in Book/Report/Conference proceeding › Chapter in book › Research

Abstract

In the Danish North Sea well M-1x several types logs have been used for obtaining data on petrophysical characteristics in strata penetrated in order to find possible reservoir rocks and hydrocarbons.

From the log evaluation the gas zone was found to be 258' thick, the oil zone 401' thick. Average porosity for the whole zone was 29 per cent, and average water-saturation 18.8 per cent. The log-derived lithology was found to be clean limestone and subsidiary dolomiti zed limestone; however, the presence of dolomite was not confirmed by X-ray analyses. The porosity of the chalk not only correlated with depth of burial but correlated with over-pressure as well.

Following zones were found to constitute the chalk reservoir, characterized by different average porosities and water-saturation:

Danian " Porous Zone":
Φ : 36.6 per cent
S_w : 14.0 per cent

Danian "Tight Zone":
Φ: 28.0 per cent
S_w: 28.7 per cent

Maastrichtian:
Φ: 28.5 per cent

S_w: 17.7 per cent

The upper part of Maastrichtian was found to be highly porous, with decreasing porosities at greater depths.

Original language	English
Title of host publication	DGU Årbog 1977
Publisher	DGU
Pages	113-129
Number of pages	17
ISBN (Print)	87-421-0715-6
DOIs	https://doi.org/10.22008/gpub/38270
Publication status	Published - 23 Oct 1978
Externally published	Yes

Publication series

Series	DGU Årbog
Volume	1977
ISSN	0105-063X

Programme Area

Programme Area 1: Data

Access to Document

10.22008/gpub/38270Licence: Unspecified

https://data.geus.dk/pure-pdf/1978_Lieberkind_A_conventional_log.pdfLicence: Unspecified

Cite this

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title = "A conventional log evaluation method for detection of lithology and hydrocarbons in the Danish North Sea well M-1x",

abstract = "In the Danish North Sea well M-1x several types logs have been used for obtaining data on petrophysical characteristics in strata penetrated in order to find possible reservoir rocks and hydrocarbons. From the log evaluation the gas zone was found to be 258' thick, the oil zone 401' thick. Average porosity for the whole zone was 29 per cent, and average water-saturation 18.8 per cent. The log-derived lithology was found to be clean limestone and subsidiary dolomiti zed limestone; however, the presence of dolomite was not confirmed by X-ray analyses. The porosity of the chalk not only correlated with depth of burial but correlated with over-pressure as well. Following zones were found to constitute the chalk reservoir, characterized by different average porosities and water-saturation: Danian {"} Porous Zone{"}: Φ : 36.6 per cent Sw : 14.0 per cent Danian {"}Tight Zone{"}: Φ: 28.0 per cent Sw: 28.7 per cent Maastrichtian: Φ: 28.5 per cent Sw: 17.7 per cent The upper part of Maastrichtian was found to be highly porous, with decreasing porosities at greater depths. ",

author = "Kirsten Lieberkind",

year = "1978",

month = oct,

day = "23",

doi = "10.22008/gpub/38270",

language = "English",

isbn = "87-421-0715-6",

series = "DGU {\AA}rbog",

publisher = "DGU",

pages = "113--129",

booktitle = "DGU {\AA}rbog 1977",

}

TY - CHAP

T1 - A conventional log evaluation method for detection of lithology and hydrocarbons in the Danish North Sea well M-1x

AU - Lieberkind, Kirsten

PY - 1978/10/23

Y1 - 1978/10/23

N2 - In the Danish North Sea well M-1x several types logs have been used for obtaining data on petrophysical characteristics in strata penetrated in order to find possible reservoir rocks and hydrocarbons. From the log evaluation the gas zone was found to be 258' thick, the oil zone 401' thick. Average porosity for the whole zone was 29 per cent, and average water-saturation 18.8 per cent. The log-derived lithology was found to be clean limestone and subsidiary dolomiti zed limestone; however, the presence of dolomite was not confirmed by X-ray analyses. The porosity of the chalk not only correlated with depth of burial but correlated with over-pressure as well. Following zones were found to constitute the chalk reservoir, characterized by different average porosities and water-saturation: Danian " Porous Zone": Φ : 36.6 per cent Sw : 14.0 per cent Danian "Tight Zone": Φ: 28.0 per cent Sw: 28.7 per cent Maastrichtian: Φ: 28.5 per cent Sw: 17.7 per cent The upper part of Maastrichtian was found to be highly porous, with decreasing porosities at greater depths.

AB - In the Danish North Sea well M-1x several types logs have been used for obtaining data on petrophysical characteristics in strata penetrated in order to find possible reservoir rocks and hydrocarbons. From the log evaluation the gas zone was found to be 258' thick, the oil zone 401' thick. Average porosity for the whole zone was 29 per cent, and average water-saturation 18.8 per cent. The log-derived lithology was found to be clean limestone and subsidiary dolomiti zed limestone; however, the presence of dolomite was not confirmed by X-ray analyses. The porosity of the chalk not only correlated with depth of burial but correlated with over-pressure as well. Following zones were found to constitute the chalk reservoir, characterized by different average porosities and water-saturation: Danian " Porous Zone": Φ : 36.6 per cent Sw : 14.0 per cent Danian "Tight Zone": Φ: 28.0 per cent Sw: 28.7 per cent Maastrichtian: Φ: 28.5 per cent Sw: 17.7 per cent The upper part of Maastrichtian was found to be highly porous, with decreasing porosities at greater depths.

U2 - 10.22008/gpub/38270

DO - 10.22008/gpub/38270

M3 - Chapter in book

SN - 87-421-0715-6

T3 - DGU Årbog

SP - 113

EP - 129

BT - DGU Årbog 1977

PB - DGU

ER -

A conventional log evaluation method for detection of lithology and hydrocarbons in the Danish North Sea well M-1x

Abstract

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