吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (4): 1295-1307.doi: 10.13278/j.cnki.jjuese.201704305
李振苓1, 沈金松2, 李曦宁2, 王磊2, 淡伟宁3, 郭森1, 朱忠民2, 于仁江3
Li Zhenling1, Shen Jinsong2, Li Xining2, Wang Lei2, Dan Weining3, Guo Sen1, Zhu Zhongmin2, Yu Renjiang3
摘要: 为了更好地实现对缝洞型储层孔隙结构和孔隙度的精细评价,基于高覆盖率和高分辨率电成像测井的电导率数据,用多尺度形态学滤波方法分离了基质孔、裂缝和溶蚀孔洞,提取了缝洞孔隙度谱。首先分析了电成像测井对裂缝和溶蚀孔洞的响应模式;其次,在简单介绍数学形态学算子的基础上,给出了结构元素选择和滤波算子构造的方法,用于电成像测井数据的噪声压制和缝洞异常电导率信息的提取;再次,基于缝洞发育处电导率异常的边缘检测结果,用椭圆形及不规则多边形函数拟合溶蚀孔洞,用多项式插值函数拟合裂缝边界,继而提取缝洞分布多类属性参数,获得缝洞孔隙度谱;最后,用实测数据对文中算法进行了测试,验证了多尺度数学形态学滤波方法用于电成像测井资料缝洞孔隙度谱计算的有效性。
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