多沉积旋回背景下黄桥句容地区烃包裹体成藏特征研究

明确包裹体发育时捕获流体的来源和捕获的期次是正确进行烃包裹体分析的关键,黄桥句容地区经历了复杂长期的构造运动,发育有多个沉积埋藏—抬升剥蚀的旋回,对其储层烃包裹体展开详细研究,有助于了解该地区油气成藏过程,并丰富南方下古生界油气成藏理论.油源对比显示黄桥和句容地区油气来源相对单一,以自生自储为主要特征,同时烃源岩生烃数值模拟表明,其具有动态多期的生烃过程,边生烃边充注边发育包裹体,因此储层主要发育同源多期包裹体.根据烃包裹体的产状和性质,研究认为黄桥和句容地区油气充注至少有两个发育阶段,黄桥地区主要为侏罗纪中期和古近纪早期,句容地区则主要为白垩纪的早期和晚期.

Study on Accumulation Characteristics by Hydrocarbon Inclusions in Huangqiao and Jurong Area with the Context of Polycyclic Sedimentation

In the process of hydrocarbon inclusions formed, express the source of captured fluid and the captured time is the key in accurately analysis hydrocarbon inclusion. Huangqiao and Jurong area experience complex and polyphase tectonic movement, have many cycles which was depositional buried and uplifting denuded. We research on the hydrocarbon inclusions in detail, it can help to know the hydrocarbon accumulation process of Huangqiao and Jurong area, and also help to enrich the accumulation theory of lower Paleozoic in South. Oil - source correlation shows the source of oil and gas was relatively single in Huangqiao and Jurong area, and showed the characteristics of the self - generated and self - stored. Meanwhile, the numerical simulation of hydrocarbon generation, reveals the source rocks had dynamically and multi - period process of hydrocarbon generation, so the generation and charging of hydrocarbon, inclusions formed was occurrenced in the same time, the inclusion formed in reservoir was homologous and multi - phase. Based on the occurrence and properties in single well inclusions, in Huangqiao and Jurong area, there were two phases at least in the process of hydrocarbon generating inclusion, suggested that had two mainly reservoir forming periods in Huangqiao area, that was Middle Jurassic and Early Paleogene period, and was lower and upper cretaceous in Jurong area.