渤海复杂薄互沉积储层地震定量预测方法及应用——以垦利X油田沙河街组储层为例

Quantitative seismic prediction method of complex thin reservoirs in the Bohai Sea: a case study of Shahejie Formation in Kenli X Oilfield

垦利X油田沙河街组储层厚度薄,单层厚度多数小于4 m,砂泥互层结构明显,受埋深影响,地震资料分辨率低,储层预测难度大。充分应用工区三维地震信息,在精细层序格架约束下,通过地层切片及属性提取与分析技术,提取多种类地震属性,在地质分析及井点信息约束下,优选出最能反映沉积特征及储层分布的地震属性,然后分析井点砂泥岩参数与地震属性的相关性,建立储层参数与地震属性的关系对地震属性进行标定,最终在沉积模式约束下,实现基于地震属性分析技术的薄互沉积储层定量预测。

For Shahejie Formation in Kenli X Oilfield,there are thin reservoirs,most of single layer thickness of less than 4 m,and obvious sand-shale interbeds.Affected by the buried depth,the resolution of seismic data is low.So it is difficult to predict reservoir.In this paper,3D seismic information is fully utilized.Under the constraints of the fine sequence framework,the multi-types of seismic attributes are extracted by stratal slices.Under the constraints of geological analysis and well point information,it is optimized the right seismic attribute,which reflects sedimentary characteristics and reservoir distribution.And then it is analyzed the correlation between reservoir parameters and seismic attributes.Thus it is established the relationship between reservoir parameters and seismic attributes.Finally,under the constraint of sedimentary model,it is realized the quantitative prediction of complex thin reservoirs based on seismic attribute analysis technique.