The main reservoir sandstone of HZ 26-1 oil field in South Chian Sea is barrier-coastal sandstone-sand bodies which were deposited during Tertiary transgression.

• 南海HZ26-1油田主要储层为第三系海进型障壁滨岸沉积体系砂体,包括海滩砂体、障壁坝砂体及沿岸坝砂体。