淮南矿区新集矿1001井煤系泥岩脆性矿物及其沉积控制

发布时间：2018-04-26 16:29

本文选题：淮南矿区 + 煤系　；参考：《煤田地质与勘探》2017年06期

【摘要】：采取钻孔岩心样品,采用X射线衍射、有机碳含量、镜质体反射率等测试方法,研究淮南矿区新集井田1001井煤系泥页岩组成特征、脆性及其沉积控制。结果表明:煤系泥页岩TOC质量分数偏低,为0.6%~6.05%,平均2.44%;干酪根类型以Ⅲ型为主,少量Ⅱb型,处于生油窗和湿气生成范围;泥岩矿物成分以石英和黏土矿物为主,脆性指数主要为20%~60%,平均45%,储层脆性高,可压裂性较好,具有储层改造的潜力。缺氧滞留还原环境有利于脆性矿物发育,对泥页岩脆性控制有促进作用;海相向陆相环境过渡过程中,黏土矿物含量增加,脆性矿物含量明显减少,泥页岩脆性受抑制;受海洋影响较强的还原环境对该井煤系泥页岩中脆性矿物的发育较为有利,这一结果可能在较大程度上受埋藏成岩作用的影响。
[Abstract]:By means of X ray diffraction, X ray diffraction, organic carbon content and vitrinite reflectance, the characteristics of shale composition, brittleness and deposition control of coal measures in well field 1001 in Huainan mining area are studied. The results show that the TOC mass fraction of coal system shale is low, 0.6%~6.05%, average 2.44%, and the type of kerogen type is mainly type III and a small amount. Type II B type is in the generating range of oil generating window and wet gas; the mineral composition of mudstone is mainly quartz and clay minerals, the brittleness index is mainly 20%~60%, average 45%, the reservoir brittleness is high, the frac ability is good, and the potential of the reservoir is reformed. The anoxic retention and reduction environment is beneficial to the development of brittle minerals, and it promotes the brittleness control of the shale; the sea phase is directed. During the transition process of continental environment, the content of clay minerals is increased, the content of brittle minerals is reduced obviously, the brittleness of shale is restrained, and the reduction environment which is strongly influenced by the ocean is beneficial to the development of brittle minerals in the shale of the coal system. This result may be greatly influenced by the buried diagenesis.

【作者单位】：中国矿业大学资源与地球科学学院;中国矿业大学煤层气资源与成藏过程教育部重点实验室;
【基金】：国家自然科学基金项目(41302130) 国家级大学生创新训练项目(201510290062) 江苏省大学生创新训练计划指导项目(201610290081X)~~
【分类号】：P618.11

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