叠前叠后地震多属性反演在牛东潜山油气检测中的应用

冀中坳陷霸县凹陷牛东潜山构造带发现和探明的古潜山油气藏为古生界寒武系碳酸盐岩储层,其储集空间以孔洞、裂缝为主,物性横向变化较大。针对潜山及潜山内幕碳酸盐岩储层非均质性较强的难点,开展叠前弹性反演研究,采取叠前弹性阻抗反演技术、AVO属性分析技术;并结合叠后子波分解与重构技术,预测和刻画储层缝洞体系的空间分布规律,划分储层发育有利区带,准确预测裂缝发育区、油气富集区。该区实钻结果表明,牛东潜山构造带碳酸盐岩储层裂缝发育,油气显示良好,证实了碳酸盐岩储层特征预测技术的有效性。

Application of Pre-stack and Post-stack Seismic Multi-attribute Inversion for Oil and Gas Inspection of Niudong Buried Hill

The ancient buried hill hydrocarbon reservoir found and proven in Niudong buried hill structural zone in Baxian sag of Jizhong Depression was Cambrian carbonate rock reservoir of Paleozoic erathom. The reservoir space is mainly composed of vugs and fractures, with the physical property varying horizontally. The study of pre-stack elastic inversion was made in the light of the bottleneck that buried hill and buried hill inner curtain carbonate rock reservoir is has a strong heterogeneity. The pre-stack elastic impedance inversion technology and AVO attribute analysis technology were adopted in combination with post-stack wavelet decomposition and restructure technology to predict and describe the space distribution law of the fracture and vug system of the reservoir, divide the favorable development zones of the reservoir and clarify the fractural development zone and hydrocarbon abundance zone. The drilling results in this region show the carbonate rock reservoir of Niudong buried hill structural zone sees development of fractures with a good prospect for oil and gas, confirming effectiveness of the technology for prediction of characteristics of carbonate rock reservoir.