碳酸盐岩裂缝储层精细建模及其数值模拟

为了有效地进行碳酸盐岩裂缝储层的地震波场数值模拟,提出了一种碳酸盐岩裂缝储层的精细建模技术,该技术包含裂缝发育带位置的准确设定和裂缝发育带物性参数的准确设定两项内容。首先基于三维叠后地震资料的裂缝检测资料和根据地震层位资料建立背景地层模型,建立包含裂缝发育带的碳酸盐岩裂缝储层模型;然后,基于流体因子分析的基质矿物体积模量反演方法,采用Hudson模型准确地计算裂缝发育带的等效物性参数。渤海某区的碳酸盐岩裂缝储层建模的实例表明,提出的碳酸盐岩裂缝储层精细建模技术能准确地建立研究区的裂缝储层模型,其得到的地震波场特征与井旁地震响应特征一致,可以有效地总结研究区裂缝储层的地震波场响应特征;并应用于指导后续的储层预测。

Carbonate fractured reservoir modeling and its numerical simulation

In order to make the seismic wave field numerical simulation in carbonate fractured reservoir more effective, the paper put forward an accurately modeling technology in carbonate fractured reservoir, the technology includes accurate setting the position of fracture-developed zone and the physical parameters. Firstly, we use the result of fracture detection that based on post stack 3D seismic data and background of the formation model that according to seismic horizon data, obtain carbonate fractured reservoir model that contain fracture-developed zone in the region of interest. Then, the method employs the technique of matrix mineral bulk modulus inversion based on fluid analysis, accurately calculate the equivalent physical parameters of fracture-developed zone. The example of a carbonate fractured reservoir modeling in Bohai area indicate that the technique in this paper can accurately establish fractured reservoir model in the region of interest and the characteristics of seismic wave field are coincident to characteristics near the wells, and it can effectively sum up seismic wave field response characteristics of the reservoir and provides the basis for the reservoir prediction.