Hans Henrik Stolum

Three freely meandering rivers in the Amazon basin were analyzed for statistical scaling properties and oxbow lake size-frequency distributions. The rivers are the Purus (central Amazon, planform data), Juruá (central Amazon, planform and oxbow lake data), and Madre de Dios (Peruvian Amazon, oxbow lake data). Long reaches were found to be power-law...

Simulations of freely meandering rivers and empirical data show that the meandering process self-organizes the river morphology, or planform, into a critical state characterized by fractal geometry. The meandering process oscillates in space and time between a state in which the river planform is ordered and one in which it is chaotic. Clusters of...

The evolution of meander belts is simulated using a single-channel model of freely meandering dynamics with constant discharge and no avulsion. This means that lateral migration of the river is not confined by a valley (i.e., it takes place on a sloping plain), and that chute cutoffs and avulsions do not occur. The meander belt undulates within a r...

Avalanche dynamics is defined as coupled internal motion at two separate time scales. The state parameter S(t) measures the amount of tension or potential energy stored in the system. Fluctuations of S(t)=Fd↑-Fa↓ are caused by the action Fd on S of the driving force, giving rise to slow, continuous motion, and the antagonistic action Fa of a relaxa...

Incomplete or ambiguous knowledge about communication is an important area of uncertainty in reservoir simulation. A new deterministic method, Strontium Fingerprinting, has proven to give exact predictions of reservoir communication and flow units in five north-sea fields. In four cases the predictions matched known behaviour of the fields from pro...

Non-linear quantitative information has been systematically extracted from various fault patterns. The information extracted relates to four aspects of the fault set: - the set seen as a whole - the set as a set of single faults - the set as a set of fault clusters, and - the set as a set of fault orientations

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, dis...

Incomplete or ambiguous knowledge about communication is an important area of uncertainty in reservoir simulation. We document several cases in which a new quantitative and deterministic method, strontium fingerprinting, can be used to give exact predictions of reservoir communication and flow units. In all cases, the isotopic composition of stront...

Unexpected faults are a serious production problem in numerous, complex and compartmentalised oil and gas fields, and are often the single most important restraint on recovery. Fractal mathematics has demonstrated a surprising degree of order in many natural, apparently random systems. It has been shown that fault patterns exhibit a similar order w...

Significant improvements in understanding and predicting reservoir behavior would result if geological and simulation models could be efficiently integrated. This presentation outlines how that aim could be facilitated by using the fractal properties of reservoir rocks. More precisely, shaly units within a marginal marine sand-shale sequence show a...

What is the matrix block size distribution of a fractured reservoir In order to answer this question and assess the potential of fractal geometry as a method of characterization of fracture networks, a pilot study has been done of the fractured chalk quarry in Laegerdorf. The fractures seen on the quarry walls were traced in the field for a total a...