摘要
为了确定辽河滩海西部地区油气成藏时间和成藏期次，运用流体包裹体法和生烃史法分析了研究区成藏时期。流体包裹体法分析认为滩海西部地区油气聚集具有两期成藏、先油后气的特点，成藏时间分别为26～19Ma和10—3Ma；生烃史法分析认为滩海西部地区主生油期为33．5～5．2Ma，主要生气区间为24．6～0．0Ma。引起差异的主要原因是2种计算方法的理论前提不同，结果显示包裹体法确定的成藏区间落在生烃史法确定的区间范围以内，与理论假设基本吻合。
To determine the timing and stages of oil and gas accumulation in western Tanhai,Liaohe oilfield,the timing of hydrocarbon accumulation in the interest area was analyzed by means of fluid inclusion method and hydrocarbon generation history method. It is concluded from fluid inclusion method that oil and gas accumulation in the western Tanhai has the features of two stages,oil first and gas later,at 26 ~ 19 Ma and 10 ~ 3 Ma respectively. Hydrocarbon generation history method shows that the primary stage of oil generation in the area was 33. 5 ~ 5. 2 Ma while that of gas generation was 24. 6 ~ 0 Ma. The difference between the two methods is mainly attributed to the different theoretical assumptions of them. From the results,it can be seen that the accumulation intervals determined by fluid inclusions fall within the scope determined by hydrocarbon generation history method,basically consistent with the theoretical assumption.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第3期41-44,152,共4页
Special Oil & Gas Reservoirs
基金
国家自然科学基金"辽河坳陷页岩油与页岩气聚集条件和聚集机理"(41272167)
国家自然科学基金"风化作用对我国南方页岩含气性影响定量研究--以渝东南龙马溪组为例"(41102088)
构造与油气资源教育部重点实验室开放基金"广元地区下寒武统极低级变质泥页岩含气性及影响因素研究"(TPR-2012-10)
关键词
油气成藏
成藏期次
流体包裹体
生烃史法
辽河滩海西部地区
oil and gas accumulation
accumulation stages,fluid inclusion
hydrocarbon generation history method
western Tanhai in Liaohe
