黄骅地区叠合盆地演化与潜山油气聚集

Huanghua superimposed basin evolution and oil & gas accumulation in buried hill

渤海湾盆地黄骅地区经历了典型的多旋回叠合盆地演化过程,发育多套烃源岩和多种储盖组合,已在中生界及上、下古生界的残留盆地中找到类型各异的潜山油气藏。印支—喜马拉雅期构造反转型演化模式有利于形成新生古储潜山油气藏;印支—喜马拉雅期叠坳型演化模式有利于形成古生古储潜山油气藏;燕山—喜马拉雅期结构反转型演化模式有利于形成新生中储潜山油藏。受多期构造活动的影响,已发现的奥陶系潜山油气藏均有多期成藏的特点。

Huanghua Area, a typical superimposed basin with multiple cycles, is developed with multiple sets of hydrocarbon source and various sets of reservoir and cap. So far various buried hill reservoirs have been discovered in the multi-stages residual basins of Mesozoic, Early and Late Paleozoic. The study shows that the structural reversion evolution pattern of Indosinian-Himalayan Epoch is favorable to form the buried hill reservoirs originated from Cenozoic and got stored in Paleozoic, while the superimposed depression evolution pattern of Indosinian-Himalayan Epoch is favorable to form the buried hill reservoirs both originated from and got stored in Paleozoic, and the textural reversion evolution pattern of Yanshan-Himalayan Epoch is favorable to form the buried hill reservoirs originated from Cenozoic and got stored in Mesozoic. With regard to reservoir forming the study concludes that the discovered Ordovician buried hill reservoirs are all formed through multi-stages of accumulation by the tectonic movements of multiple stages.