陕北低渗油藏深度酸化降压增注酸液体系研发  

Research and Development of Deep Acidizing Pressure Reducing and Accelerating Acid Injection System for Low Permeability Reservoirs in Northern Shaanxi

作　　者：王鹏涛[1] 赵琪 王小军[1] 马江波 WANG Peng-tao;ZHAO Qi;WANG Xiao-jun;MA Jiang-bo(Exploration and Development Research Institute of Xingzichuan Oil Production Plant,Yanchang Oilfield Co., Ltd.,Yan'an Shaanxi 717400,China)

机构地区：[1]延长油田股份有限公司杏子川采油厂勘探开发研究所

出　　处：《粘接》2019年第6期156-160,共5页Adhesion

摘　　要：针对陕北区块低孔、低渗储层注水过程泵压较高、储层堵塞严重,造成注水措施无法实施,从而影响油田整体开发的问题,通过实验分析了储层堵塞物主要成分,按照深度酸化、转向功能、低伤害的要求,设计了新型深度酸液体系,通过长岩心(1m)实验分析结果表明,设计的新酸液体系具有较好的深度穿透功能,酸化后岩心渗透率提高近9倍,渗透率沿酸液穿透路径损失率较低,仅10%左右,有效实现了深度酸化的目的.Aiming at the problems of high pump pressure and serious reservoir blockage during water in. jection in low-porosity and low-permeability reservoirs in northern Shaanxi block,which make water in. jection measures impossible to implement,thus affecting the overall development of oilfields,the main com. ponents of reservoir blockage are analyzed through experiments. According to the requirements of deep acidification,steering function and low damage,a new type of deep acid fluid system is designed,and the results of long core (1m) experiment analysis are presented. The results show that the new acid system has good deep penetration function. After acidification,core permeability increases nearly 9 times,and the loss rate of permeability along the acid penetration path is low,only about 10%. The purpose of deep acidification is effectively realized.

关 键 词：低渗储层 酸化改造 深度酸化 酸液体系 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]