古老碳酸盐岩古油藏储量计算方法探讨——以四川盆地安岳气田灯影组为例  

Discussion on reserve calculation method of paleo oil reservoir in ancient carbonate——a case study from the Dengying Formation of the Anyue gas field in Sichuan basin

作　　者：郭泽清[1] 梁坤[1] 吴培红[1] 冉启贵[1] 孔凡志[1] 余华琪[1] 孔骅[1] 邢娅 胡俊文[1] GUO Zeqing;LIANG Kun;WU Peihong;RAN Qigui;KONG Fanzhi;YU Huaqi;KONG Hua;XING Ya;HU Junwen(Research Institute of Petroleum Exploration and Development PetroChina,Beijing 100083,China)

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《地质学报》2022年第1期317-329,共13页Acta Geologica Sinica

基　　金：中国科学院A类战略性先导科技专项(编号XDA14000000)资助成果。

摘　　要：在古油藏石油储量计算过程中,一般是根据沥青的分布面积确定古油藏面积或者根据古圈闭面积确定古油藏面积,这些方法存在局限性。针对现有确定古油藏石油地质储量方法的缺陷和不足,本文以四川盆地安岳气田震旦系灯影组气藏为例,创建了古油藏储量计算公式,同时建立了古油藏面积与现今气藏面积之间的关系式以及古油藏孔隙度与现今气藏孔隙度之间的关系式。依据现今气藏的各项参数:包括含气面积、储层物性、含气饱和度、原始气体偏差系数、地层温度、天然气密度、气藏地层压力以及与之相似的油藏的石油密度、石油体积系数和沥青密度,根据物质守恒定律,定量计算古油藏的地质储量,提高了结果的可靠性和准确性。这将为中国海相高—过成熟地区古油藏的储量恢复提供新的思路,同时古油藏的储量恢复对再现成藏动态演化过程具有重要意义。In the calculation of oil reserves of paleo oil reservoirs, the area of paleo oil reservoirs is generally determined according to the distribution area of asphalt or according to the area of paleo traps. These methods have limitations. In view of the defects and deficiencies in the existing methods for determining the petroleum reserves of paleo oil reservoirs, considering the Sinian Dengying Formation gas field of the Anyue gas field in the Sichuan basin as an example, the calculation formula of paleo oil reservoirs was established.At the same time the relationship between paleo oil reservoir area and current gas reservoir area, and the relationship between paleo oil reservoir porosity and current gas reservoir porosity was established. Taking into consideration multiple parameters of the current gas reservoir, including gas bearing area, reservoir physical properties, gas saturation, original gas deviation coefficient, formation temperature, the formation pressure of gas reservoir, natural gas density, and the oil density, oil volume coefficient and asphalt density of similar oil reservoirs, oil reserves of paleo oil reservoirs were quantitatively calculated according to the law of material conservation, which improved the reliability and accuracy of the results. This will provide a new idea for the reserve recovery of paleo oil reservoirs in marine high over mature areas in China. At the same time, the reserve recovery of ancient reservoir is of great significance to reproduce the dynamic evolution process of reservoir formation.

关 键 词：古油藏 震旦系 四川盆地 安岳气田 储量计算公式 

分 类 号：P618.13[天文地球—矿床学]