【摘要】 近年来在八岭山-花园背斜构造翼部有新的油气发现,有必要对其构造性质进行再认识。通过地震解剖,认为渔洋组-新沟嘴组(K2y-Ex)有盐和盐泥两类构造叠置,可进一步划分为盐丘-盐柱多层叠置构造、盐泥丘-盐泥株(柱)构造和盐泥丘构造;盐泥构造的形成是塑化的盐泥岩顺层蠕动使每一单层变厚、多层累加增厚的叠加效应结果,盐泥沿早期断层侵入或底辟导致逆断层的产生,使断层具有下正上逆的特点;差异负荷和火山热对流为其主导动力学机制;渔洋组-沙市组下段(K2y-Es下)盐丘-盐柱产生期为中始新世,主要形成期为晚渐新世,沙市组上段-新沟嘴组(Es上-Ex)盐泥构造产生期为晚渐新世,两者均于更新世基本定型;盐泥构造翼部地层-盐泥封挡和上倾尖灭岩性-盐泥封挡圈闭为潜在的油气藏勘探类型。更多还原

【Abstract】 New discovery of oil and gas in the flank of Balingshan-Huayuan anticline structure in the recent years makes it necessary to have a further understanding of its structural nature. Based on the interpretation of seismic profiles,it is considered that K2 y-Ex is the superimposition of salt and mud tectonics,and can be divided into salt dome-salt pillar multi-layered superimposed structure,salt mud dome-salt mud pillar structure and salt mud dome structure. The formation of salt mud tectonics was the superposition effect of plasticized salt mud stone bedding creep which led to thickening of the single layer and the multi-layer cumulation. Reverse fault was formed by the salt mud intrusion along the early hanging wall of fault and the diapirism,thus the fault had the characteristics of the upper bed showing reverse and the lower showing normal. Differential loading and volcanic thermal convection were the dominant dynamic mechanisms. The salt dome-salt pillar of K2 y-Lower Es occurred at the Middle Eocene with the main formation stage of the Late Oligocene,the salt mud tectonics of upper Es-Ex occurred at the Late Oligocene,and both of them finalized basically in Pleistocene. The salt mud tectonic wing stratasalt mud sealing barrier trap and the lithologic updip pinch out-salt mud sealing barrier trap are the potential oil and gas reservoir exploration types.更多还原