|Table of Contents|

Uncertainty and Scientific Methodology in Subsurface Reservoir Characterization(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2012年第02期
Page:
72-80
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Uncertainty and Scientific Methodology in Subsurface Reservoir Characterization
Author(s):
WU Sheng-he;  YANG Yan-qiang
School of Geosciences, China University of Petroleum, Beijing 102249, China
Keywords:
subsurface geology;  reservoir characterization;  development geology;  uncertainty;  random;  fuzzy;  scientific methodology;  contradictory entity
PACS:
P618.130.2; N941.5
DOI:
-
Abstract:
Due to the complexity of geology and the incompleteness of the data, subsurface reservoirs are shown as grey box systems. Thus, great uncertainty exists in the reservoir characterization. The genetic types, the essence of the uncertainty and the possible solutions for uncertainty reduction were discussed based on the system theory and philosophy of science. The scientific methodology that should be implemented in the reservoir characterization procedure was also addressed. Uncertainties were grouped into two types according to their fundamental difference. One was random uncertainty that was caused by predicting the entirety from the fraction, such as predicting the inter-well reservoir from well data. Another reason of random uncertainty was non-complete mapping from secondary data such as predicting the reservoir from seismic data. The second type of uncertainty was named as fuzzy uncertainty that was caused by insufficient cognition of the reservoir conceptual model. In order to make the reservoir model more close to the geological reality, the correctly implementation of the new related theories and methods should be guided by a more scientific characterization philosophy. Some of the philosophical characterization principles were proposed. The characterization procedure should be perceived in an overall view, and the geological analysis should be hierarchically constrained. The characterization would integrate multiple disciplines while it was geologically focused. The geologists should follow a divergent seeking and reasoning as well as a point-focused demonstration. The investigation will comply with dialectical thinking and comprehensive analysis. Meanwhile, some relationships in contradictory entities, such as macroform and microform, certainty and ambiguity, static and dynamic, mapping and divergence, fraction and entirety, fuzzy and concrete, certainty and randomness, specialty and generalization, complexity and simplicity, hand-operation and automation, should be correctly understood and handled competently and successfully.

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Last Update: 2012-06-20