Issue 42/2013 - Oilfield chemical compound viscosity reduction technology debuts successfully

Recently, the chemical composite viscosity reduction technology developed by Northwest Oilfield Engineering Technology Research Institute made its debut
in the oilfield heavy oil well TH12367X.
A total of 8 tons of composite viscosity reducing agent were injected into the well, and after the implementation of the composite viscosity reduction process test, the doping ratio was reduced from 2.
27 to 0.
67, the input-output ratio reached 1:4.
5, the viscosity of crude oil was reduced from 1120 mPa ·s to 500 mPa ·s, and the thin oil used in dilution was reduced from 29.
7 tons to 11 tons, saving 236.
5 tons of
thin oil cumulatively.

In the early stage, the northwest oilfield mainly used the method of dilute viscosity reduction to extract heavy oil, but with the expansion of the scale of exploitation, the thin oil resources were seriously insufficient
.
To this end, the Institute of Engineering Technology organized a technical team to develop a chemical viscosity reduction technology
aimed at doping substitution.
It is reported that the heavy oil viscosity reducer used in the early stage of Tahe oilfield is divided into two types: water-soluble and oil-soluble, among which the water-soluble viscosity reducing agent has low cost, high safety factor and good compatibility; Oil-soluble viscosity reducer has stronger viscosity reduction performance, especially suitable for oil wells
with high water content.
In view of the advantages of the two agents, the researchers proposed a new idea
for the exploitation of heavy oil with water-soluble and oil-soluble composite viscosity reducers.
(Hu Peng)