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江汉盆地海相地层矿物流体包裹体,按成岩序列和共生组合关系可划分为5期和5种组合类型,其中2~5种组合类型(第3~6期)与油气的生成、运移和聚集关系密切。相应的均一温度和含盐度分别在105~180℃和8~20ω(NaCleq)%之间,有机包裹体丰度67.3%,平均总烃质量分数0.295×10-6,平均CH4/CO2比值1.32。包裹体诸参数,结合其他有机地球化学资料综合证实,区内烃源岩母质类型好,有机质丰度较高,油气演化处于高成熟阶段。石油和天然气大量生成、运移和聚集分别发生在印支-燕山早期和燕山晚期-喜马拉雅期,并与圈闭的形成相配套,油气藏保存条件较佳,油气勘探前景较好。
The fluid inclusions in the marine strata of Jianghan Basin can be divided into five types and five types according to diagenetic sequence and symbiotic assemblage types. Among them, two to five types of assemblages (stages 3-6) and hydrocarbon generation and migration Aggregation is closely related. The corresponding homogenization temperatures and salinities were between 105 ~ 180 ℃ and 8 ~ 20ω (NaCleq)% respectively. The abundance of organic inclusions was 67.3%, the average total mass fraction of hydrocarbons was 0.295 × 10-6, the average CH4 / CO2 ratio of 1.32. Based on the data of other organic geochemical data, it is confirmed that the types of hydrocarbon source rocks in the area are good, the abundance of organic matter is high, and the evolution of oil and gas is in a high maturity stage. The massive formation, migration and accumulation of oil and natural gas occurred in the Indosinian-Early Yanshanian and Late Yanshanian-Himalayan periods, respectively, and matched with the formation of traps. The oil and gas reservoirs have better preservation conditions and better prospect of oil and gas exploration.