The reefs, the bioclastic banks and the biological psammitic-psephitic banks that are associated in form of supper and lower backreefs are hard to form favorable reservoir facies.

• 礁和与之呈伴生的生屑滩、生物砂砾屑滩为本区优质的储集岩相，而礁后单独发育的中低能砂屑滩则不易形成优质的储集层。