同济大学学报（自然科学版）2024，Vol.52Issue(7)：1143-1150,8.DOI:10.11908/j.issn.0253-374x.22420
渤海海域烃源岩三峰接力生气特征及意义
Characteristics and Significance of Triple Natural Gas Peak Relay Generation of Source Rocks in Bohai Sea Area
摘要
Abstract
The Bohai Sea area of the Bohai Bay Basin is an important direction in oil and gas exploration at present and in the future.Understanding of the generation pathway,mechanism,and potential of natural gas at Bohai Sea area is beneficial for developing the natural gas generation theory and guideing petroleum exploration in the Bohai Bay Basin.Through the simulation experiment of typical source rocks in Liaozhong Sag of the Bohai Sea area,the generation characteristics of main source rocks in the Bohai Sea area are studied,and the generation model of main source rocks in the Bohai Sea area is established.Based on the analysis of typical hydrocarbon accumulation mechanism,the accumulation regularity of different types of natural gas is identified,and the potential and direction of natural gas are discussed.The results show that Type II1 and Type II2 hydrocarbon source rocks of the third member of the Shahe Formation in the Bohai Sea area have the characteristics of triple peak relay gas generation.The Ro of the three gas generation peaks is 1.0%(①),1.5%(②)and 2.7%(③),respectively.The three gas generation peaks show intermittent relay gas generation characteristics.The total gas production of the three gas generation stages has a Peak ③ ≈Peak ②＞Peak ①;Natural gas reservoirs generated at Peak ① and Peak ② stages are generally developed in Liaozhong Sag of the Bohai Sea area,among them,Peak① mainly shows atmospheric pressure oil and gas accumulation in the slope zone close to the source rock,and Peak② mainly shows overpressure condensate gas accumulation in the uplift zone.The natural gas formed by Peak ③ is only found at local well points.It shows that the deep source rocks in Liaozhong Sag have entered Peak ③ stage and have the potential to form large over-mature gas reservoirs.关键词
渤海海域/辽中凹陷/生排烃模拟实验/接力生气/充注成藏Key words
Bohai Sea/Liaozhong Sag/experiment of hydrocarbon generation/natural gas relaying generation/gas charging history分类
通用工业技术引用本文复制引用
李威,吴克强,徐建永,刘志峰,郭刚,杨永才,林青..渤海海域烃源岩三峰接力生气特征及意义[J].同济大学学报（自然科学版）,2024,52(7):1143-1150,8.基金项目
中国海洋石油集团有限公司"十四五"重大科技项目(KJGG2021-0300) （KJGG2021-0300）
