In this theme has two ways to add logo. At first customize has a option to add logo globally in Oculus theme.
Navigate to Appearance → Customize in your WordPress admin dashboard. To setup logo navigate Theme Option → General Settings
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After clicking General Settings, there are more option about theme. Logo option is one of them. Setup global logo from here.
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In this theme has another option to change logo. Anyone can used different logo in this theme. This option is used for individual page.
Navigate Pages from Dashboard and select a page to click edit.
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After clicking Edit option, you can see page setup. In bottom you can also observe logo option, then you select logo for this page
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