在准噶尔盆地莫索湾地区选取了5口具有不同油气显示级别的典型探井,通过对48块岩心样品作精细的储层油气包裹体GOI组成分析,尝试探讨了在复杂油气充注情况下,叠合盆地油气包裹体GOI组成的成因。结果表明,含油气流体的充注强度是主因。但由于油气成藏的多期复合、油气水界面的多期变迁,决定了我们在研究过程中不可以直接借鉴文献中提出的1%和5%等指标来判断油气水层,而是应该结合地质背景,首先仔细分析其成因,再深入讨论应用。文中利用GOI对莫索湾地区的油气运移进行了讨论,取得了良好效果,表明其在叠合盆地油气运移研究中具有一定应用前景。
Five typical wells with different oil and gas shows were selected for GOI (Grains containing/with oil inclusions) analyses in the Mosuowan area, central Junggar Basin. Analytical results from 48 reservoir samples indicate that the intensity of petroleum charging decides GOI composition. However, due to complex petroleum charge histories in superimposed basins, it is suggested that we should not simply use GOI to define petroleum migration along previous threshold line as 1% or 5%. The right way must be based on geological background, to firstly discuss the origin of GOI data and then try to apply them in mapping hydrocarbon charge history. In this paper, a case study in the Mosuowan area implies that GOI can be used quantitatively in the research of petroleum migration in structurally complex basins.