Vilken riktning tar rekryteringen i närmaste framtid?
EAGE2002presentation2
1. Stig-A. Kristoffersen, Sergey V. Larionov, Lars Kollbotn - Petec
Iskander Diyashev , Mr. Krasnevski, Mr. Ryjov - Sibneft
Yuriy V. Kondratovich, Alexander V. Grinshpoon, CGE
Reservoir Characterization
An approach to reveal reservoir properties and
develop well planning strategies in Novogodneye Field
NW Siberia -Russia
2. Purpose of this study
Enhance understanding of Jurassic reservoir heterogenety
Utilize horisontal resolution in amplitude based horizon slices
Seismic 2D and 3D facies analysis of 3D data.
Understand the geomorphology and depositional models within the
Jurassic reservoir.
Seismic stratigraphy in combined with sequence stratigraphical
interpretation of the wells.
Deliniate and visualize Jurassic intra-well potential.
Guide the geomodel into reservoir simulation of the field.
3. ENVIRONMENTAL CHALLENGES OF FIELD DEVELOPMENT
Flat terrain with small rivers, lakes and low lands.
Climate is harsh with temperatures down to -61 degrees 0
C to +35 0
C.
Permafrost is 200 meters.
Logistical challenges for Roads and building of Drilling Sites
Base Cretaceous level has a closing
contour at 2875 meters. This anticline
fold with NW strike, is 28 km in
length and 22,5 km wide (areal extent
of about 630 km2). The structural
relief at this level is about 185
meters.
The Novogodney Field was discovered in 1976, and lies
about 75 kilometers to the east from Noyabrsk City in
Jamalo-Nenetsky autonomous okrug of Tuymen region
in the West Siberia. The field belongs to the
Vyngapiakutinskaya oil province. It is located between
two mature fields, Vyngayakhinskoye and
Vyngapurovskoye.
4. Cretaceous Formation
The production started in 1986 from BV3-1 reservoir.
107 production wells and 28 water injection wells for the BV3-1 reservoir in
the period from 1986 – 1992.
The initial GIP for Cenomanian Formation was 9,3 109 Sm3. BV3-1 the
STOIIP is 17,2 x106 ton. The oil reserves in Arch1 have not been proven yet.
The total amount of produced oil from BV3-1 is 2,99 106 ton by 1.12.99.
The current oil recovery factor is 16% of STOIIP. The goal set to 36% of
STOIIP. The majorities of production wells are shut down and idle today.
Water injection has stopped.
Jurassic Formation
J1 consists of two reservoir intervals J1-1 and J1-2, and were under test
production from 1987. It is also likely to find oil in J4 reservoir.
12 wells including 9 oil production wells, 1 water injection well and
2exploration wells. J1-1 with STOIIP of 84 x106 ton and
The average well oil rate is 21,2 ton/day. The total production by 1.12.99
amounted to 464 106 ton of oil.
Water has been injected periodically, about 3-5 months/year, and the total
injected volume is 96 x 103 Sm3. It is proved a high productivity of the
Formation. Reliability of the reservoir character has not yet been established.
New pilot areas have been introduced in order to aquire more reservoir
information and production data in order to build a solid reservoir model. 5
vertical and 2 deviated wells have been drilled with 1000 meters spacing
between the wells. The production level of 125 106 ton/year is to be achieved
by year 2002.
119 deliniation and exploration wells
5. WELL TIES
The oil reserves of Novogodney Field are associated with several intervals of the stratigraphy
Cretaceous - BV3-0, BV3-1, BV4-3 Cenomanian and Ach1
Jurassic - J1-1 J1-2 J2and J4
6. Pilot areas
3-D Seismic OultineBerezovsky
J1-1
J1-2
J1-3
WELL STRATIGRAPHY
AND 3 D COVERAGE
3D surveys were performed in year 2000 and 2001.
We interprete the J1 sequence to be an overall
regressive system, with a transgressive Upper
Jurassic sequence on top of this.
9. TYUMEN LEVEL
Mid J1-3 LEVEL
Mid J1-2 LEVEL
Upper J1-1 LEVEL
Lower B LEVEL
Tyumen
Mid J1-3
Mid J1-2
Upper J1-1
Lower BNOVOGODNEYE FIELD
HORIZON SLICES WITHIN
JURASSIC INTERVAL
Lacustrine Deltafront with minor back-barrier sand deposits. Deltafront
is part of an overall regressive sequence starting approximately at this
level
Lacustrine Deltafront has moved further to the south west in the
mapped area. More fluvial influx.
A deltaplain with braided river systems trending from the south west
into the north east in mapped area. Identifications of Mouth bar sands
and back barrier sands.
A deltaplain with associated braided rivers trending south west - north
east . Mouth bar sands and back barrier sands .
Beach with shore line trending SE-NW, some offhsore bar and/ or river
mouth sand bodies can be detected into the NE part.
10. Potential undrilled sand bodies
within J1-1 reservoir
Proposed new horizontal wells to be drilled
in future drilling campains
Undrilled sand bodies within Jurassic
Reservoir history
match and forecast
models has a good
match given the
presented facies
distribution through
field.
11. For the contributions and
allowing us to present the
field data at EAGE 2002 in
Florence, Italy.
&
Aknowledgements
