摘要
为实现鄂尔多斯盆地某油田致密油的高效合理开发,利用X射线衍射、薄片鉴定等方法研究了区块内致密砂岩储层特征,并通过岩心流动试验方法对储层敏感性进行了评价。结果表明:目标区块储层内黏土矿物以蒙脱石为主,储层平均孔隙度为9. 48%,平均渗透率为0. 81×10^(-3)μm^2,地层水为CaCl_2水型。储层敏感性评价结果表明:目标区块内储层速敏损害程度为中等偏强,水敏感性为强,酸敏感性为弱,应力敏感性为强。依据致密砂岩储层特征分析及敏感性评价结果,在致密油开采过程中应有针对性地采取储层保护措施,避免储层敏感性的发生,选择合适的钻完井工艺及压裂酸化措施,为鄂尔多斯盆地某油田致密油储层的高效稳定开发提供保障。
In order to achieve the effective and reasonable development of tight oil in an oilfield of Ordos Basin, the characteristics of tight sandstone reservoir in the block are studied by X-ray diffraction and thin slice identification, and reservoir sensitivity is evaluated by core flow test method. The results show that the clay nlinerals in the target block are mainly nlontmorillonite, the average porosity is 9.48%, the average permeability is 0.81×10^-3μm^2, and the formation water is CaCl2 water type. The results of reservoir sensitivity evaluation indicate that the damage degree of reservoir velocity sensitivity is medium to strong, sensitive to water sensitivity, weak in acid sensitivity and strong in stress sensitivity. Based on the characteristics of tight sandstone reservoir sensitivity analysis and evaluation results, in the process of exploitation, tight oil reservoir should be targeted to take protective nleasures to avoid the occurrence of reservoir sensitivity, select drilling technology and suitable measures for fracturing and aeidizing, which provides guarantees for the efficient and stable development of tight oil reservoir in an oil field in Ordos Basin.
作者
郑维伟
ZHENG Weiwei(School of Earth Sciences,Yangtze University,Wuhan 430100,China)
出处
《能源化工》
2018年第3期75-78,共4页
Energy Chemical Industry
关键词
鄂尔多斯盆地
致密油
储层特征
敏感性
储层保护
Ordos Basin
tight oil
reservoir characteristics
sensitivity
reservoir protection
