Hydraulic stimulation
in the Netherlands – 50 years of experience
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Overview
Experience
295 hydraulic stimulation jobs in 246 wells
Target
Tight reservoirs; often in Rotliegend and Triassic Sst
Upside
Relative small number of hydraulic stimulation jobs com- pared to potential incremental producible volumes
Statistical analysis
On hydraulic stimulations performed in the Netherlands since 1996
Result 1
Injected proppant volume larger than 90 metric tons are almost always a success
Result 2
All 10 stimulation jobs with a 12/18 mesh proppant are a success
Result 3
The formations with the majority of the hydraulically stimu- lated reservoirs are the Rotliegend and the Triassic
Opportunities
Typical ultimate recovery in conventional reservoirs The current average ultimate recovery in Rotliegend and Triassic gas reservoirs in the Netherlands is 85%
Identified tight gas volumes
In the Dutch tight reservoir portfolio 470 bcm of static GIIP volumes are identified with an estimated ultimate recovery of 47%
Prize
Increasing the ultimate recovery in the Dutch tight reser- voirs with a few percentages by means of hydraulic stimu- lation can lead to an incremental gas production of a part of the 250 bcm currently unconnected volumes
0 2 4 6 8 10 12 14 16 18
1954 1956 1958 1960 1962 1964
1966 1968 1970 1972
1974 1976
1978
1980 1982 1984
1986 1988 1990 1992 1994
1996 1998 2000 2002 2004 2006 2008 2010 2012
Number of hydraulic stimulations per year
0 2 4 6 8 10 12 14 16 18
<50 50-100 100-150 150-200 200-250 250-300 >300
# of stimulation jobs
Injected proppant (mT)
Succes No succes
12/18 16/20 16/30 20/40 20/40 & 16/20 20/40 & 16/30
# of stimulation jobs
Proppant size
Succes No succes
0 2 4 6 8 10 12 14 16
0 5 10 15 20 25 30 35 40
Number of stimulations per formation Cretaceous
Zechstein Carboniferous Triassic Rotliegend
Hydraulic stimulation operation, Friesland area, the Netherlands, 2012
85%
15%
Conventional reservoirs
47
?
?
Tight reservoirs
Ultimate recovery
Scope for recovery increase by stimulation Unproducible
