油气散失定量研究方法及其在准噶尔盆地的应用

首先将油气散失类型分为油气运移过程中的散失和油气成藏后的散失2大类，并分别进行了讨论．在详细分析研究资料的基础上，对油气散失的6种主要途径和机理进行了描述，建立了5种相关的油气散失地质模型和数学模型，介绍了准噶尔盆地油气散失的定量计算方法，其中对天然气扩散作用造成的散失量计算模型展开了深入的讨论．在此基础上，对准噶尔盆地油气散失的研究提出了相关建议．

QUANTIFICATION OF HYDROCARBON LOSSES AND THEIR GEOLOGICAL APPLICATION

Firstly, two major categories of modes and approaches of oil and gas losses have been presented in this paper, namely, the hydrocarbon loss through migration and after formation of reservoirs, and then different modes of hydrocarbon losses were discussed respectively. Secondly, on the basis of detailed analysis of the studied data, 6 major types of hydrocarbon losses as well as their mechanisms were described in detail, including hydrocarbon losses through faulting, adsorption, water solution, diffusion of (gas), secondary alteration and tectonic movements. Five types of corresponding geological and mathematical models of oil and gas losses have been established, particularly about the calculation model of the hydrocarbon loss caused by gas diffusion. Quantitative calculation approaches applied in Junggar Basin were introduced. Finally, proposals were made on the study of hydrocarbon losses for Junngar Basin.