横波各向异性在碳酸盐岩裂缝性储集层评价中的应用

对碳酸盐岩中裂缝是否存在及其有效性的评价一直是碳酸盐岩测井储集层评价所面临的一大难题。横波在各向异性地层中传播具有分裂现象，而裂缝性地层应具有各向异性，利用偶极横波成像测井资料所提取的快、慢横波信息能指示地层的各向异性大小，而裂缝的密度、张开度等与裂缝的各向异性有密切关系，从而识别裂缝及其有效性。在塔里木盆地轮古地区碳酸盐岩裂缝性储集层中的实际应用证实，被充填裂缝的横波各向异性特征弱，而未充填裂缝的横波各向异性强，利用横波的各向异性特征，可以定性分析裂缝的有效性，为试油提供有效的决策依据。

Application of shear wave anisotropy in fractural carbonate reservoir evaluation

Generally, fractural formation is anisotropy and is a big challenge for evaluating reservoirs. According to the phenomenon of the fast and slow shear wave, the degree of anisotropy can be showed by using the information drawn from DSI image data. The density and gaping degree of fractures are related with the degree of anisotropy, so the effectiveness of fracture can be evaluated. Through application in fractural reservoir of Lungu region in Tarim Basin, the fracture effectiveness could be qualitatively analyzed by using the features of shear wave division, and could be used for searching for high production well and oil and gas testing.