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机构地区:[1]中石化华北油气分公司采油一厂
出 处:《录井工程》2017年第4期124-128,共5页Mud Logging Engineering
基 金:中国石油科技创新基金项目(编号:2015D-5006-0106);国家自然科学基金(编号:51104119)
摘 要:应用水驱实验和储集层敏感性流动实验评价方法,对鄂尔多斯盆地渭北油田延长组浅层超低渗致密砂岩油藏储集层进行敏感性评价。评价结果表明,长3储集层属于弱水敏,长6储集层属于弱-中等偏弱水敏,长7储集层属于弱-中等偏弱水敏。储集层岩石水敏性随层位加深,水敏指数增加,水敏性增强。长3储集层无酸敏,长6储集层属于无-弱酸敏,长7储集层属于无-弱酸敏。整体上,研究区储集层酸敏性评价结果为无-弱酸敏,随储集层深度增加,酸敏性增强。储集层水敏性、酸敏性的变化趋势与储集层黏土矿物分布相吻合。The evaluation methods of water flooding experiment and reservoir sensitive flow test are used to evaluate the sensitivity of shallow tight sandstone reservoirs with ultra-low permeability of Yanchang formation in Weibei Oilfield of Ordos Basin. The evaluation results shows that Chang 3 reservoir belongs to weak water sensitivity,Chang 6 and 7 reservoirs belong to weak-moderate weak water sensitivity. The water sensitivity of reservoir rocks is deepened with the horizon,the water sensitivity index increases and the water sensitivity is enhanced. Chang 3 reservoir is non acid-sensitive,and Chang 6 and Chang 7 reservoirs are non-weak acid sensitive. On the whole,the evaluation results of the acid sensitivity of the reservoirs in the study area were non-weak acid sensitive. The acid sensitivity is enhanced with the increase of reservoir depth. The change trend in reservoir water sensitivity and acid sensitivity is consistent with the distribution of clay minerals in the reservoir.
关 键 词:鄂尔多斯盆地 浅层超低渗致密砂岩 储集层敏感性 渭北油田 延长组
分 类 号:TE132.1[石油与天然气工程—油气勘探]
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