含水率法在沈84块下层系高凝油剩余油饱和度预测中的应用

Application of water cut method in predicting saturation of residual high pour point oil of lower series, Shen 84 block

针对沈 84块下层系的地质特征及开发实际 ,利用含水率法对其剩余油饱和度进行预测。预测结果表明 :该区高凝油藏在平面上含油饱和度呈现东高西低 ,南高北低 ,断层边角地带和注采关系不完善地区含油饱和度较高的特点 ;纵向上主力层段油层底部水淹较重 ,剩余油饱和度较低 ,其上部较高。通过该项研究 ,对该块下层系的剩余油分布规律有了新的认识 ,为该块的下步调整提供了有力依据 ,该方法是预测高凝油油藏剩余油分布规律的有效方法。

Saturation of residual oil in the lower series of Shen 84 block was predicted with water cut method according to its geological characteristics and development status. It presents that the saturation features higher in the east and south direction as well as the fault edges and injection/production uncompleted areas, but west and north in the contrary on the plan view. Nevertheless, in vertical direction, bottom of main producing interval occurs serious water out and relatively low residual oil saturation, but the upper parts vice versa. New understanding on the distribution regularities of residual oil contained in the subjected series has been reached via the study and it provides reliable basis for further production adjustment and effective prediction of residual oil distribution.