Basin Analysis by Model Simulation--Effects of Geologic Parameters on One-and Two-Dimensional Fluid Flow Systems, with Application to an Oil Field

K. Nakayama, I. Lerche

A computerized two dimensional dynamic model was used for basin analysis to simulate fluid flow, heat transfer, and petroleum generation and migration processes in an offshore oil field of an evolving sedimentary basin. Through the application, we confirmed that the results from the model can be used to estimate the timing and amount of petroleum generation and migration consistent with downhole data. Although the estimates carry uncertainties (produced predominantly by lack of knowledge of some geologic parameters), nevertheless, we were able to bound the range of the uncertainties, using the model as an experimental tool. Such effects are slightly different in using a two-dimensional model versus a one-dimensional model. Dominant parameters most influenced pertain to re ervoir character, such as porosity, permeability, shaliness, and geometry. Sensitivity testing elucidates the differences in the one- and two-dimensional fluid flow and compaction models, and provides conditions for the relevant application arenas for each model.

AAPG Search and Discovery Article #91042©1987 GCAGS and GC-SEPM Section Meeting, San Antonio, Texas, October 28-31, 1987.