珠三坳陷有机包裹体应用研究

珠三坳陷由于其多样的烃源条件，多套生储盖组合，使得含油气系统复杂化，为了解我油气分布、运移、聚集和成藏的质规律，本文运用有机包裹体对该区的烃源、油气藏注入史以及油气运聚与断裂发育的关系进行了研究，研究中３采用荧光偏光显微镜、显微冷热台、显微傅立叶变换红外光谱、Ｒｂ－Ｓｒ同位素等多项有机包裹体分析技术，研究结果认为：珠三坳陷琼海凸起上的两其期有机包裹体无论是类型、期次、分布特征、均一温度还是成熟度，

Study on application of organic inclusions in Zhu III depression.

The petroleum systems are complicate because there are more source rock and more source reservoir caprock assemblage in Zhu III Depression. The organic inclusion was applied to study the hydrocarbon source, petroleum reservoir charge history as well as the relation between oil gas accumulation and fault for finding out the geological law of the distribution, migration, accumulation and reservoir of oil gas in this area. It was adopted that the fluorescence microscope, U.S.G.S. Gas Flow Heating/Freezing System, Micro Fourier Transform Infrared Spectrometry as well as Rb and Sr isotopes and so on, which is the multimedia analysis technology of organic inclusion. It is suggested that the type, number of times, distribution, homogenization temperature, maturity, structure and composition of organic inclusions are similarity between Wenchang A Sag and Qionghai Uplift in Zhu III Depression. Therefore, it was deduced that the sources of Qionghai Uplift come from Wenchang A Sag mainly. The process of oil and gas filling in each structure as well as the causes of the difference of oil was analysed. Furthermore, the seal or open of fault was decided . The relation between oil gas accumulation and fault was analysed by ways of the organic inclusions. It shows that the tension fractures advantage the first migration of oil and gas, and the compressive fractures advantage the second migration in Wenchang A Sag. The tension fracture was formed before the migration of oil gas in Wenchang B Sag. It was inferred that the timing of oil and gas migration ranges from 6 Ma to 16.5 Ma in Wenchang B Sag.