多源多相复杂储集层预测——以春风油田新近系沙湾组一段1砂组为例

Prediction on complex reservoir with multi-source and multi-facies:Taking N₁s₁¹ in Chunfeng Oilfield as an example

宋玲

Song Ling

中国石化胜利油田分公司西部新区研究院，山东 东营 257000

Research Institute of New District in West China, Shengli Oilfield Company, SINOPEC, Dongying 257000, China

对于多物源、多沉积相类型、古地貌复杂的地区，常规地震属性储集层预测技术的预测精度会明显降低。为此，文中提出了基于不同物源体系及沉积相类型分区域精确描述的储集层的预测方法，并在准噶尔盆地春风油田进行了有效验证。春风油田沙湾组一段1砂组具有西北和西南2个物源区，主要对应发育近源扇三角洲沉积体系和远源辫状河三角洲沉积体系。针对西南物源远源辫状河三角洲地震强反射砂体，主要采用了振幅类地震属性特征进行储集层的识别和描述；针对西北物源近源扇三角洲地震空白反射砂体，在“坡折控砂”理论约束下利用地震资料拓频处理技术，实现地震资料有效高频成分的增强，提高地震分辨率，达到追踪描述超覆带砂体边界的目的。

The accuracy of reservoir prediction with conventional seismic attributes will decrease when the study area has the characteristics of multi-source, multi-facies and complex palaeotopography. Therefore, this paper presents an accurate reservoir prediction method based on different provenance systems and sedimentary facies types. And the application of this method in Chunfeng Oilfield is very effective. The northwest and southwest provenances are the main provenances of N1s11 in Chunfeng Oilfield, corresponding developed near-source fan delta sedimentary system and far-source braided river delta sedimentary system. Reservoirs of southwest-source braided river delta have strong reflection features in seismic profiles, and the reservoir identification and description mainly use amplitude properties. Reservoirs of northwest-source fan delta have blank reflection features in seismic profiles, and the description of western reservoir boundary in Chepaizi Area mainly uses the theory of "controlling the distribution of sand by slope break belt" and frequency-broadening processing technology of seismic data, broadening the valid frequency bandwidth, improving the seismic resolution and tracking the description of west boundary of sand body in Chepaizi Area.

10.6056/dkyqt201405013