Abstract: The saline inclusions in the authigenic minerals of sandstone reservoirs of Jurassic from two wells in Block-1 of center Junggar basin are measured by synchrotron radiation X-ray microprobe techniques. Some element contents, such as K, Ti, Mn, Fe, Ni, Cu and Sr, are calibrated by NIST SRM 612 typical sample. The results show that the microelement contents (except for Fe) of saline inclusions of Well Zhuang-1 and Well Zheng-1 are distinctly different. It is predicted that the reservoirs of Jurassic in Well Zhuang-1 and Well Zheng-1 are different in hydrocarbon accumulation and oil source, for their fluid properties are in big difference. The analysis of the homogenization temperature and the oil-bearing fluid inclusions of whole core confirm the conclusion above.

Key words: Junggar basin, saline inclusion, microelement, homogenization temperature