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作 者:刘辰生[1] 郭建华[1] 朱美衡[2] 苏调红[1]
机构地区:[1]中南大学地学与环境工程学院,湖南长沙410083 [2]中石化胜利油田有限公司地质科学研究院,山东东营257015
出 处:《新疆地质》2008年第2期151-154,共4页Xinjiang Geology
摘 要:阿克库勒地区东河砂岩以石英砂岩为主,成熟度较好,但物性较差,平均孔隙度小于10%,平均渗透率为5.41×10-3μm2.该区东河砂岩具极强的非均质性,这种非均质性与沉积相类型和成岩作用有关.滨岸相沉积的东河砂岩一般具较好物性,而潮坪相沉积的东河砂岩储集层物性较差.对东河砂岩物性影响较大的成岩作用包括胶结作用和大气降水淋滤作用.其中,碳酸盐岩胶结是主要胶结类型,对储集层物性的破坏作用最大,石英次生加大和粘土矿物胶结降低了储集层物性,也降低了孔隙的连通性,大气降水的淋滤作用使东河砂岩段顶部砂体储集物性变好.由于哈得逊地区和塔中地区东河砂岩沉积相类型和构造位置不同于研究区,其储集层物性较研究区好.'Donghe sandstone in Akekule area mainly consist of quarz, it has better maturity, but it's average physical property is poor, its porosity being less than 10%, average permeability being 5.41×100^-3μm^2. The Donghe sandstone in study area has very strong heterogeneity, and it has connection with facies types and diagenesis. The Donghe sandstone deposited in shore has better reservoir physical property, but the sandstone deposited in tide flat doesn't have. The diagenesis that has important effect on reservoir physical property is cement and eluviations with atmospheric water. The carbonate cement is the major cement type, and it destroys the physical property strongly. Quartz and clay mineral cement lower the physical property and connection of porosity. But the eluviations with atmospheric wate improve the physical property of top sandstone of Donghe series. Because the facies types and structural location in Hadexun and Tazhong area are better than study area, the reservoir physical property is better than study area.
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