Liquids comprised solely of anions and cations (“ionic liquids”) are disclosed as novel components of fluids (and techniques relying upon those fluids) for stimulation of hydrocarbon wells. In particular, the fluids disclosed are useful in matrix acidizing. Formation of the ionic liquids of the present Invention is highly exothermic, hence the heat generated can be used, for instance, to melt de-watered drilling fluid in the near-wellbore region of the formation. Further, reaction of the ionic liquids with water results in acid generation; this acid can be used to, for instance, to stimulate a formation, either by conventional matrix acidizing or fracture acidizing. In addition, certain preferred species of the ionic liquids of the present Invention are highly stable solvents, hence they can be used as carrier fluids for highly reactive super acids (e.g., SbF5+HF) in connection with matrix acidizing.
本发明揭示了仅由阴离子和阳离子组成的液体(“
离子液体”)作为刺激烃类井的流体(以及依赖这些流体的技术)的新组分。特别是,所揭示的流体在基质酸化中非常有用。本发明的
离子液体的形成是高度放热的,因此生成的热量可以用于在地层井口附近熔化除
水钻井液。此外,
离子液体与
水的反应会产生酸;这种酸可以用于刺激地层,无论是通过传统的基质酸化还是裂缝酸化。此外,本发明的某些优选
离子液体物种是高度稳定的溶剂,因此它们可以作为高反应性超级酸(例如SbF5+HF)的载体流体,用于基质酸化。