Imperial College London

Dr Craig Smalley

Faculty of EngineeringDepartment of Earth Science & Engineering

Visiting Professor







Royal School of MinesSouth Kensington Campus






BibTex format

author = {Stolum, HH and Smalley, PC and Hanke, NM},
doi = {10.1144/0041421},
pages = {1421--1432},
title = {Prediction of large-scale communication in the Smørbukk fields from strontium fingerprinting},
url = {},
year = {1993}

RIS format (EndNote, RefMan)

AB - This paper discusses a new method which uses intra-field variability of formation water chemistry as a measure of degree of reservoir compartmentalization. If two reservoir units are in good flow communication, it is more likely that any water compositional variations that might have arisen would have homogenized by mixing processes (diffusion, dispersion, flow). On the other hand, a lack of flow communication is likely to inhibit water mixing and thus preserve variations in water compositions. Thus, whatever the cause of intra-field variations in water composition, two reservoir units that have a similar water chemistry are more likely to be in good flow communication than two units with different water compositions. In this study the isotopic composition of strontium (87Sr/86Sr) dissolved in the formation water was used to monitor formation water compositional variability. This natural isotopic tracer is particularly useful as it can be measured simply from conventional core samples by extracting residual salts which have precipitated in the pore spaces as a result of formation water evaporation during storage. The Smerbukk fields (Smorbukk North and Smorbukk South, Haltenbanken area, Norwegian Continental Shelf) comprise three Jurassic reservoir intervals, the Garn, He and Tilje formations. In Smorbukk North the main problems are vertical compartmentalization by areally extensive shales and lateral compartmentalization by extensive quartz cementation. In one well, residual salt analysis (RSA) shows that water 87Sr/86Sr compositions are extremely homogeneous in each of the Tilje 1 and 2 reservoir zones, indicating good internal vertical communication. However, the Tilje 1 and 2 waters are significantly different from each other, indicating that the shale that separates Tilje 1 and 2 is an effective barrier to vertical communication. A similar relation is seen in a second well, suggesting that the shale barrier is indeed laterally extensive. In the second well, Til
AU - Stolum,HH
AU - Smalley,PC
AU - Hanke,NM
DO - 10.1144/0041421
EP - 1432
PY - 1993///
SN - 2047-9921
SP - 1421
TI - Prediction of large-scale communication in the Smørbukk fields from strontium fingerprinting
UR -
ER -