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位于渤海湾盆地中心的歧口凹陷在中生代、新生代经历了复杂的基底断裂改造过程,形成了大量的潜山构造。利用新采集的三维地震数据体,对不同位序潜山进行了构造落实,明确了中位序、低位序潜山的发育受控于印支期古构造及古近纪盆缘断裂,存在残丘型和断块型2种类型,残丘型潜山主要发育在滨海断裂系以北,勘探层系为奥陶系,断块潜山发育在其南部,勘探层系包括奥陶系、二叠系以及中生界;由于更靠近歧口生油气中心,中位序、低位序潜山油气源条件充沛,其在中生界、新生界经历了断裂褶皱改造,局部地区风化剥蚀作用强,储层发育,油气勘探潜力巨大。
The Qikou Sag, located in the center of the Bohai Bay Basin, underwent Mesozoic and Cenozoic undergone a complex process of basement fault alteration and a large number of buried hill structures were formed. Using the newly acquired 3D seismic data body, the buried hills with different sequences have been constructed and confirmed. The development of low-order buried hills is controlled by the Indosinian ancient structures and the Paleogene basin margin faults with the existence of residual The mound type and fault block type are two types. The buried hill type is mainly developed in the north of the Binhai fault system, the exploration strata are Ordovician series, fault block buried hill is developed in the south, and the exploration strata include Ordovician series, Mesozoic, Mesozoic and Mesozoic. Due to their close proximity to the Qikoukou oil and gas center, the mid-sequence and low-sequence buried hill oil and gas source conditions are plentiful. In the Mesozoic and Cenozoic, the Cenozoic experienced the rupture and fold modification and the weathering and denudation in some areas was strong. Reservoir development, oil and gas exploration has great potential.