9345765603

9345765603



Statoil

Snehvit C02 Tubaen Fm. storage capacity and injection strategy study

Doc. No.

Valid from

Rev. no. 1.0

representative for Tubaen Fm. They recommend to carry out geomechanical modelling to address i), which should lead to a large reduction in the uncertainty of CPP

A 4 m gas cap was encountered in the uppermost zonę of Tubaen Fm. in well 7121 /4-1, drilled high on the Snohvit structure. A minimum gas volume has been calculated; see Figurę 28 and Table 2-10. A gas expansion factor (Bg) of 0.0046 has been used in the calculations giving a total of 262 mili Sm* gas initially in place.

Possible dosure at Top ' •• Tubaen levd -2451mTVDSS


Figurę 28 Map of possible gas cap extension in Tubaen Fm (


Table 2-10: Volume estimate of gas cap in Tubaen Fm, all in 106 m3.

The Tubaen Fm. is not fully delineated, as minor gas volumes also may exists in other zones close to the top of the structure or in higher areas of the F-segment, such as west of the F-2 H well and east of the 6-1 well. Any residual oil present in Tubaen Fm will also be compressed. This has been discussed in

For a ‘tank’ of volume V infinite permeability and average pressure increase <S>p, storability given by rock and water compressibility is given by:

<8>m = <S>V p = p <S>p (Cp+Cw) V

Classification: Intemal Status: Draft Expiry datę: 2012-12-31 Page 38 of 132



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