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储层流体包裹体测试分析是研究油气运移、成藏时间和期次等问题的一种非常有效的方法。克拉 2气田储层流体包裹体类型及其丰度统计分析表明 ,烃类包裹体丰度与储层含油气性之间具有明显相关性。根据包裹体产状、均一温度和包裹体成分拉曼光谱分析结果发现 ,油气在成岩早期就开始注入 ,并一直保存在储层中 ,直到后期才裂解成干气。有机包裹体均一温度表现为一个主峰 ,盐水包裹体均一温度有三个区间 (峰值 ) ,其中第一个峰值与有机包裹体均一温度主峰几乎一致。因此 ,6 0～ 12 0℃为油气注入成藏时的温度 ,130～ 16 0℃为油气藏埋藏深度最大时的温度 ,最大埋深在 5 80 0 m左右 ,经后期构造作用抬升至 35 0 0～ 40 0 0 m;2 2 0～ 330℃这个温度段为高温热液改造时的温度 ,克拉 2气田受这一高温的改造 ,形成了很纯的干气气藏
Fluid fluid inclusions test analysis is a very effective method to study the hydrocarbon migration, accumulation time and period. The fluid inclusion types and abundances in the Kela-2 gas field show that there is a clear correlation between the abundance of hydrocarbon inclusions and the hydrocarbon-bearing properties of the reservoirs. Based on the inclusions, homogenization temperatures and Raman spectra of inclusions, we found that oil and gas began to be injected in the early diagenesis and remained in the reservoirs until they were later cracked into dry gas. The homogenization temperature of organic inclusions shows one main peak, and the homogenization temperature of the brine inclusions has three intervals (peak), of which the first peak is almost the same as the main peak of homogeneous temperature of organic inclusions. Therefore, the temperature at 600 ~ 1200 ℃ is the temperature at the time of oil-gas injection and accumulation, and the temperature at 130 ~ 160 ℃ is the maximum buried depth of oil and gas reservoirs. The maximum buried depth is about 5 80 0 m and the post-tectonic uplift reaches 35 0 0 ~ 40 0 0 m; and the temperature range of 220 ~ 330 ℃ is the temperature at the time of high-temperature hydrothermal reformation, and the Kela-2 gas field is transformed by this high temperature to form a pure dry gas reservoir