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发明公开
CN104099077A 一种高矿化度油藏复合驱油剂 有权

一种高矿化度油藏复合驱油剂
摘要：
本发明涉及一种高矿化度油藏复合驱油剂，其复合驱油体系的组分及质量百分比是：含盐量32000mg/L-360000mg/L，Ca2+、Mg2+大于1000mg/L高矿化度地层水97.5%-99.9%、黄原胶0-0.5%、阴-非两性表面活性剂0.1%-1%、阴-阳两性表面活性剂0%-1%。利用高矿化度地层水中金属一价、二价阳离子、生物聚合物分子、两性表面活性剂分子之间的协同效应，使驱油体系既有较高的粘度，又有较低的界面张力，且长期稳定。满足了高矿化度油藏大幅度提高采收率技术驱油体系扩大波及体积，提高驱油效率的要求。
摘要（英）：

The invention relates to a kind of high mineralization oil reservoir composite oil displacement agent comprising the following components by mass: 97.5%-99.9% of highly mineralized formation brine with the salt content of 32000mg / L-360000mg / L and the Ca2 + and Mg2 + content of being greater than 1000mg / L, 0-0.5% of xanthan gum, 0.1%-1% of a negative-non ampholytic surfactant and 0%-1% of a negative-positive ampholytic surfactant, and by use of the synergistic effect among metal monovalent and divalent cations, biological polymers and amphoteric surfactant molecules, the oil displacement agent not only has higher viscosity, low interfacial tension, and long-term stability, and can meet the requirements of great improvement of recovery efficiency, technical oil displacement system wave and volume enlargement, and improvement of oil displacement efficiency of a high mineralization oil reservoir.

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