岩性油气藏 ›› 2015, Vol. 27 ›› Issue (3): 8793.doi: 10.3969/j.issn.1673-8926.2015.03.013
闫建平1,2,言 语2,司马立强2,温丹妮2,温新房3,耿 斌4
YAN Jianping 1,2, YAN Yu 2, SIMA Liqiang 2, WEN Danni 2, WEN Xinfang 3, GENG Bin 4
摘要:
泥页岩地层通常具有低孔、低渗特征,存在裂缝及裂缝发育程度均是其能够成为储层的决定性条件。 以苏北盆地阜宁组泥页岩地层为研究对象,研究裂缝特征及其与岩性、物性、含油性、电性及可压裂性(“五性”)之间的关系。 结果表明:裂缝普遍含油,发育裂隙的样品渗透率明显较高,一般都大于 10 mD,裂缝对改善泥页岩地层的渗透性及储集性起到了重要作用;含裂隙样品通常脆性矿物(方解石)含量较高,对应的岩性一般为灰质泥岩、含灰页岩及含灰泥岩;天然裂隙发育的层段杨氏模量较高、泊松比较低、脆性系数较高,页岩的脆性较强,通常易于压裂改造。利用测井响应特征可明显区分方解石充填裂缝和有油迹显示的无充填裂缝,可为识别有效泥页岩储层提供依据。
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