Afren says its Okwok-9 appraisal well offshore south-east Nigeria found 10 ½ m of net pay in the D2 reservoir and tested 31º API oil at sustained rates. The company now is considering stand-alone development versus tieback to Ebok.p style="margin-bottom: 0cm;">Afren says its Okwok-9 appraisal well offshore south-east Nigeria found 10 ½ m of net pay in the D2 reservoir and tested 31º API oil at sustained rates. The company now is considering stand-alone development versus tieback to Ebok.