Offshore well: E7-1

The E7-1 well  was drilled in 1982, in the Baltic, ca 100 km west of Liepaja. Its purpose was to study the geological section and potential perspectivity of Lower Palaeozoic deposits in a big SW-NE trending fault-defined structure E7.

The well has penetrated a normal  Palaeozoic section consisting of Devonian, Silurian, Ordovician and Cambrian deposits; there was a good correlation of depths with those predicted based on seismic data.          

Oil shows have been observed in Upper Ordovician calcarenites, having porosity 4.2-7.8%  and very low permeability.

The porosity of Middle Cambrian prospective sandstones was 5-23%, permeability– up to 168 mD.

The well was plugged and abandoned at the total derth 1,650 m in the pre-Cambrian basament.

Location

Field

Spud classification

Operator

Elevation, m

TD

(drill),

 m

Rig type

TD date

Age of rock at bottom

Water depth,

m

Baltic sea

E7

Exploration

26.7

1650.5

Jack-up

1982

Pre-Cambrian

53.6

Latitude

(Krasovsky 1940)

Longitude

(Krasovsky 1940)

Latitude

(WGS 84)

Longitude

(WGS-84)

X-UTM (E)

Zone 34N

Y-UTM (N)

Zone 34N

56^o00’18”

19^o42’54”

56^o0’17.213”

19^o42’37.166”

419745

6207356

GENERAL DATA

BIT SIZE

CASING

LOG DATA in LAS format

CORING

STRATIGRAPHY

CONVENTIONAL CORE DECRIPTION

PETROPHYSICAL AHALYSIS DATA

TESTING RESULTS

FORMATION WATER COMPOSITION

TOC AND PYROLYSIS DATA

EXTRACTION AND FRACTIONATION DATA

GAS CHROMATOGRAPHY

GAS CHROMATOGRAPHY - MASS SPECTROMETRY

GAS CHROMATOGRAMS AND ION TRACES m/z 191 & m/z 217

VELOCITY SURVEY DATA