Нефтегазовые нанотехнологии для разработки и эксплуатации месторождений. Часть 3. Евдокимов И.Н - 16 стр.

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OIL RECOVERY-2003

the 1-st International Conference

on Modern Challenges in Oil Recovery (RECOVERY – 2003)

May 19-23, 2003 Moscow

THERMALLY-INDUCED VISCOSITY ANOMALIES IN

EMULSIONS UTILISED IN OIL RECOVERY OPERATIONS

Evdokimov I.N., Eliseev N.Yu.

Gubkin Russian State University of Oil and Gas

Introduction

The factors contributing to the rheological parameters and to the

colloid structure of petroleum emulsions is a problem of great con-

cern and economic importance to the development of oil reservoirs.

Crude oils are mostly invariably accompanied by water. Water-in-

crude oil emulsions are usually produced by the shear action and

the pressure gradient drop in the well-head chokes and valves and

in the production pipelines. Bitumen emulsions are injected into oil

reservoirs to increase recovery efficiency. There is a high industrial

demand for viscosity data for petroleum emulsions, particularly for

those with very heavy oil components, rich in resins and asphalte-

nes. Still, only a limited number of results are available on emul-

sion viscosities as detailed functions of such important external

parameter as temperature. Moreover, the determination of the in-

ner structure of emulsions via the majority of structure-sensitive

measurements is only possible when the fluid is at rest. In con-

trast, rheometrical measurements offer means to evaluate the in-

ner structure of emulsions in course of their flow.