| 陕甘宁盆地东部上三叠统含油长石砂岩的成岩特点及孔隙演化 |
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| 引用本文： | 柳益群,李文厚.陕甘宁盆地东部上三叠统含油长石砂岩的成岩特点及孔隙演化[J].沉积学报,1996,14(3):87-96. |
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| 作者姓名： | 柳益群 李文厚 |
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| 作者单位： | 西北大学地质系 西安 710069 |
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| 摘 要： | 本文通过对三条地表剖面和２０口探井的综合研究，认为斑脱岩和火山碎屑物质是影响陕甘宁盆地东部上三叠统长６油层组含油长石砂岩成岩作用的根本原因。浊沸石、方解石、绿泥石的胶结、化学压实作用和浊沸石、长石的溶解作用是影响砂岩储集性能的主要因素。孔隙的演化与成岩史、盆地演化史密切相关，长６２—长６４是孔隙结构最好的层段。较好的储油砂体分布在子长、子北地区以及延安—延长—富县—宜川地区等利于浊沸石溶蚀的地带。
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| 关 键 词： | 成岩作用 孔隙演化 长6油层组 上三叠统含油长石砂岩 |
| 收稿时间： | 1995-08-14 |
Diagenetic Characteristics and Porosity Evolution of the Oil-Bearing Arkoses in the Upper Triassic in the Eastern Shaan-Gan-Ning Basin |
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| Liu Yiqun,and Li Wenhou.Diagenetic Characteristics and Porosity Evolution of the Oil-Bearing Arkoses in the Upper Triassic in the Eastern Shaan-Gan-Ning Basin[J].Acta Sedimentologica Sinica,1996,14(3):87-96. |
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| Authors: | Liu Yiqun and Li Wenhou |
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| Institution: | Department of Geology, Northwest University, Xi'an 710069 |
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| Abstract: | An intensive study has been done in the east of the Shaan-Gan-Ning basin by observing three sections and twenty wells, several main conclusions have been presented as follows: the bentonites and volcanic clastic materials are essential factors to effect the diagenesis of oil-bearing arkose; the cementation of laumontite, calcite and chlorite, the pressure solution, as well as the dissolution of laumontite, feldspar are main causes to effect reservoir ability of oil -bearing arkoses; the evolution of porosity hasa relationship with the diagenetic history and the evolution of basin; Chang 6 2 Chang 6 4 oil-bearing beds are the best type of porosity structure; The firly good oil-bearing sandbodies distribute in the area of Zichang and northern Zichang, Yan'an-Yanchang-Fuxian-Yichuan as well as those regions in which laumontite is easily dissolved. |
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| Keywords: | diagenesis\ porosity evolution\ Chang6 oil-bearing beds\ Upper Triassic\ oil -bearing arkose |
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