FAST PHASE 1 ARCHIVE
April 2001-March 2004

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chemical inhibitors
control of surface adhesion
flow modelling
inhibitor evaluation & selection
gas permeabilities
high pressure, high temperature
HPLC Analysis
mechanistic studies
naphthenates
oilfield scale
predicting the problem
scale dissolvers
squeeze treatments
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Mechanistic Studies


Environmental Scanning Electron Microscopy(ESEM)

ESEM wettability characteristics of various substrates.

ESEM, 22k

Atomic Force Microscopy (AFM)

barium sulphate, 20K

barium sulphate spirals forming in a flow cell

inhibitor film polished surface, 11kinhibitor film after pre-treatment, 12k

visualisation of inhibitor film by afm

AFM studies allow investigation of the scale inhibitor/mineral interaction at the lattice scale.

Synchrotron Radiation (National Laboratories - UK and USA)

synchrotron radiation, 59KClick on thumbnail to view diagram (img, 59K), which will open in a new browser window.

Examination of additive mediated scale precipitation using in-situ synchrotron radiation X-ray diffraction.

graph, 6K

Angle dispersive XRD data for barium sulphate formed in the
presence of calcium in a) raw, and b) integrated form.

graph2, 6K

Effect of calcium on the barium sulphate lattice.

In-Situ Barium Sulphate Formation Observed by Synchrotron

A high pressure cell was developed and commissioned for use in the synchrotron. After establishing that the cell could be used to examine in-situ barium sulphate precipitation further tests were carried out at 2,000 psi. These tests were designed to determine the effect of the concentration of formation water, divalent cations (calcium, magnesium and strontium) and presence of inhibitor (4 ppm PPCA or DETPMP) on the unit25 October, 2012

Schematic of high pressure cell.

Molecular Modelling

Molecular modelling of chemical and geochemical interaction of inhibitors.

unit cell of barite, 8K

unit cell of barite

Molecular Modelling