松辽盆地北部齐家-古龙地区断层裂缝体系分维特征及其应用

Fractal Dimensions of Fault Fracture Systems and Their Applications in Qijia Gulong Depression, Songliao Basin

在对松辽盆地北部齐家－古龙地区泥岩裂缝油藏形成机理进行分析的基础上，应用盒式维数和信息维数计算了该区Ｔ２反射层不同区域内断层裂缝体系分维值。通过对各区断层裂缝体系分维特征的分析，发现断层裂缝体系分维高值区域与泥岩裂缝油藏的分布存在着较好的对应关系，这不仅表明断层伴生裂缝是该区泥岩裂缝的主要成因类型，同时也表明断层裂缝体系分维特征是定量描述泥岩裂缝油藏油气运移和聚集条件的一个重要参数。根据这一规律对该区泥岩裂缝油藏的有利分布区进行了预测。

The formation mechanism of fractured mudstone reservoirs in Qijia Gulong depression of Songliao Basin is discussed, and then the fractal dimensions of fault fracture systems for horizon T 2 in different parts of the area are calculated using the box counting approach. From the analysis of the relationship between the fractal dimensions and the distribution of the fractured mudstone reservoirs, it is found that the zones with high fractal dimensions are those with fractured mudstone reservoirs. This suggests that the fractures of mudstone in the area in question are mainly those associated with faults, and the fractal dimensions of fault fracture systems are important parameters in quantitatively characterizing the migration and accumulation conditions of fractured mudstone reservoirs. Finally the zones which are favorable for the formation of fractured mudstone reservoirs are predicted in the depression.