A combination of streamtube and geostatical simulation methodologies for the study of large oil reservoirs

Conference · Fri Aug 01 04:00:00 EDT 1997

OSTI ID:508528

Chakravarty, A; Emanuel, A S; Bernath, J A ^[1]

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1. Chevron Petroleum Technology Company, LaHabra, CA (United States)

The application of streamtube models for reservoir simulation has an extensive history in the oil industry. Although these models are strictly applicable only to fields under voidage balance, they have proved to be useful in a large number of fields provided that there is no solution gas evolution and production. These models combine the benefit of very fast computational time with the practical ability to model a large reservoir over the course of its history. These models do not, however, directly incorporate the detailed geological information that recent experience has taught is important. This paper presents a technique for mapping the saturation information contained in a history matched streamtube model onto a detailed geostatistically derived finite difference grid. With this technique, the saturation information in a streamtube model, data that is actually statistical in nature, can be identified with actual physical locations in a field and a picture of the remaining oil saturation can be determined. Alternatively, the streamtube model can be used to simulate the early development history of a field and the saturation data then used to initialize detailed late time finite difference models. The proposed method is presented through an example application to the Ninian reservoir. This reservoir, located in the North Sea (UK), is a heterogeneous sandstone characterized by a line drive waterflood, with about 160 wells, and a 16 year history. The reservoir was satisfactorily history matched and mapped for remaining oil saturation. A comparison to 3-D seismic survey and recently drilled wells have provided preliminary verification.

• Research Organization: BDM Corp., Bartlesville, OK (United States); American Association Petroleum Geologists, Tulsa, OK (United States)
• OSTI ID: 508528
• Report Number(s): CONF-970317--; ON: DE97004613
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
58 GEOSCIENCES
ENHANCED RECOVERY
KRIGING
NORTH SEA
OIL FIELDS
PETROLEUM
PRODUCTION
RESERVOIR ENGINEERING
WATERFLOODING