Keywords Hade 4 oil field;Donghe sandstone;subtle reservoir;seismic explanation;tectonic description;pinch-out line;sequence stratigraphy;water-oil contact;

• 哈得4油田;东河砂岩;隐蔽油;藏地震解释;构造描述;尖灭线;层序地层学;油水界面;配套技术;