ISSN 1673-8217 CN 41-1388/TE
主管:中国石油化工集团有限公司 主办:中国石油化工股份有限公司河南油田分公司
齐亚林, 孙勃, 庞锦莲, 徐智. 2015: 陇东地区延长组长8油层组有机质组成特征及地质意义. 石油地质与工程, 29(02): 33-37+146.
引用本文: 齐亚林, 孙勃, 庞锦莲, 徐智. 2015: 陇东地区延长组长8油层组有机质组成特征及地质意义. 石油地质与工程, 29(02): 33-37+146.
Qi Yalin, . 2015: Organic matter composition characteristics and geological significance of Chang 8 oil layers,Yanchang formation in Longdong area. Petroleum Geology and Engineering, 29(02): 33-37+146.
Citation: Qi Yalin, . 2015: Organic matter composition characteristics and geological significance of Chang 8 oil layers,Yanchang formation in Longdong area. Petroleum Geology and Engineering, 29(02): 33-37+146.

陇东地区延长组长8油层组有机质组成特征及地质意义

Organic matter composition characteristics and geological significance of Chang 8 oil layers,Yanchang formation in Longdong area

  • 摘要: 地层条件下原油的密度、黏度、凝固点是衡量原油流动性能和产能的重要指标,也是影响地层压力的关键,与储集层中有机质组成密切相关。综合应用热蒸发烃气相色谱、岩石热解、核磁共振、荧光显微图像等多种储集层流体性质判别手段,分析了鄂尔多斯盆地陇东地区延长组长8油层组有机质组成特征及其对流体性能和地层压力的影响,结果表明,储集层中有机质含有较高的胶质沥青质等重质组分是导致地层条件下可动油含量低、试油与预期不符的原因;包括溶解气在内的地层条件下储集层中有机质的组成、丰度及其纵向分布特征是导致地层异常低压重要原因之一。

     

    Abstract: Under the geological conditions,density,viscosity,freezing point of crude oil are important indicator to measure oil flow performance and capacity,as well as the key to influence formation pressure,and they are closely related with the organic composition of reservoir.By integrated application of thermal evaporation hydrocarbon,rock pyrolysis gas chromatograph,nuclear magnetic resonance(NMR),fluorescent micro-image and various reservoir laminar liquid discriminant methods,organic matter composition characteristics of Chang 8 oil layer from Yanchang formation of Longdong area in Ordos basin and its effect on the performance of fluid and formation pressure have been analyzed.The results show that the reservoir of organic matter containing high colloid asphalt and other heavy components,which are the reasons for low movable oil content and testing not accord with expectation under the geological conditions.Including dissolved gas formation in the reservoir under the conditions of the composition,abundance and vertical distribution characteristics of organic matter are one of the important reasons for leading to abnormal low pressure of formation.

     

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