Page 266 - Gas Wettability of Reservoir Rock Surfaces with Porous Media

250 Gas Wettability of Reservoir Rock Surfaces with Porous Media

Oily cuttings or sludge

Adding degreaser
Chemical Residue
Oil recovery
cleaning treatment
Adding hardening agent
Wastewater
Solidification
disposal
Flocculant oxidizing agent
Flocculation Leachate test
oxidation

Standardized
Wastewater test
discharge

Standardized
discharge
FIGURE 6.33
Process flowchart for oily cuttings treatment.

sludge, flocculation oxidation of treated oily waste water, and a process to
render any residue harmless. The process flowchart is as shown in
Fig. 6.33.
The equipment used includes a centrifuge device, storage tank, and feeding
device. There is low equipment demand, simple operation, and it is safe and
low cost. At the same time, it meets the demand of resource recycling and
harmless treatment of field-based oily cuttings.

6.4.3.3 FIELD APPLICATION OF OILY CUTTING TREATMENT
3
47 m oily cuttings of Yihe 2AH well and Sangta 2 10 well were treated in
total, and 4.2 tons of oil were recycled. The field application and relevant test-
ing results are shown in Fig. 6.34 and Tables 6.27 6.29.
It can be seen from Fig. 6.34 that when the oily cuttings in the well fields are
treated, oil is recycled, wastewater residue is reasonably disposed, and the well
field recovers to the original ecological landscape. Tables 6.27 6.29 indicate
that the oil degradation rate is up to 96% when the oily cuttings are treated.
The main indexes of the leachate oily waste water and solidified residue all
meet the secondary standard GB8978-1996 of Integrated Wastewater
Discharge Standard, and successfully solve problems such as resource recovery
and treatment of oily cuttings.