オマーンにおける石油随伴水の処理技術の開発と水資源としての可能性

抄録

During the oil production process, oily waste water is coproduced at a rate several times that of oil. This water is known as produced water. Treatment levels and technologies are selected based on disposal method or reutilization objectives, environmental impacts, economics, and other such factors. For the treatment of produced water, the treatment system equipped with nitrogen microbubble flotation in conjunction with anthracite filtration and activated carbon adsorption was designed and examined.

Polymer flooding is being used as an enhanced oil recovery（EOR）method in Oman. The quality of polymer flood produced water（PFPW）is different from produced water（PW）without polymer, it was clarified that aluminum sulfate （AS）is more effective than poly-aluminum chloride（PAC）as a flocculant. Based on the examination results, a 50 m³/ day capacity pilot plant was designed, fabricated, and utilized to conduct produced water treatment trials, good oil removal was confirmed in all tests.

It was also confirmed that this accompanied water treatment water could be used as irrigation water for agriculture by performing necessary higher order treatment. As a result, it was considered that the development as a new water source in the Middle East, where water resources are scarce, could be expected.