塔里木盆地顺北5号断裂带北段奥陶系油气成藏期次及其控制因素

王斌, 赵永强, 何生, 郭小文, 曹自成, 邓尚, 吴鲜, 杨毅

Hydrocarbon accumulation stages and their controlling factors in the northern Ordovician Shunbei 5 fault zone, Tarim Basin

Bin Wang, Yongqiang Zhao, Sheng He, Xiaowen Guo, Zicheng Cao, Shang Deng, Xian Wu, Yi Yang

图2 顺北5号断裂带北段奥陶系储层方解石脉发育特征 a，b.交代残余方解石C1，溶蚀边缘发育，暗红色阴极发光，SB5井,埋深7 425.3 m；c. C2方解石脉切割硅质团块，SB5井,埋深7 425.7 m；d, e, f. C2方解石脉，不发阴极光，沿C2边缘发育沥青裂缝，电镜下可见片状分布沥青，SB5井,埋深7 426.2 m；g，h.高角度裂缝充填C3方解石脉，发棕黄色阴极光，切割C2方解石脉，SB51井,埋深7 564.3 m；i，j.裂缝充填C2和C3两期方解石，SB5井,埋深7 427.1 m；k，l.高角度裂缝充填C3方解石脉，发棕黄色阴极光，SB5-1井,埋深7 468.9 m

Fig.2 Characteristics of calcite veins developed in the Ordovician reservoirs of the north section of the Shunbei 5 fault belt