The land part of Dagang exploration area of Huanghua Depression has entered mid-later phase after 40-year exploration, which resulted in increasing difficulty in exploration.

• 经历了近40年勘探的黄骅坳陷大港探区,其陆地部分已进入勘探的中晚期阶段,勘探难度日渐加大,但从近期勘探成果和剩余资源看,仍有较大的勘探潜力。