摘要
水平井分段酸压是低渗、致密碳酸盐岩储层改造的有效措施,尚无有效的监测方法验证压裂改造后各压裂段对产油产水的贡献。笔者用新型化学材料做示踪剂,该示踪剂无毒无放射性,与地层吸附率极低,试剂检测灵敏度达到10^(-3) mg/L,水剂只与水亲和,油剂只与油亲和,可以对油、水两相单独测试并分别评价产出剖面。该示踪剂适用于高温酸性环境,与酸压工作液配伍性良好,油剂可良好分散在胶凝酸体系中。该研究可解决致密油气田水平井分段酸压改造产能监测困难的问题,为该类区块水平井分段酸压效果评价提供可靠依据。
Sectional acid fracturing in horizontal wells was an effective measure to reconstruct the low permeability and tight carbonate reservoirs.At present,there was no monitoring method to test the contribution of fracturing sections to oil production and water production after fracturing.In this paper,new chemical materials were used as tracer.The tracer.was non-toxic and radioactive free.The formation adsorption rate was very low.The sensitivity of reagent detection reaches 10^(-3) mg/L.The water was only compatible with water,and the oil was only compatible with oil.The oil and water phases could be tested separately and their output profiles could be evaluated respectively.Meanwhile,the tracer is suitable for high temperature acid environment.It has good compatibility with acid fracturing fluid.The oil can be well dispersed in gelled acid system.The problem that it is hard to monitor the production capacity of horizontal acid fracturing in horizontal wells in tight oil and gas fields can be solved.It provides reliable basis for the evaluation of staged acid fracturing effect of horizontal wells in this kind of block.
出处
《长江大学学报（自然科学版）》
CAS
2017年第23期83-86,共4页
Journal of Yangtze University(Natural Science Edition)
关键词
示踪剂
产能监测
水平井压裂
分段酸压改造
tracer
productivity monitoring
horizontal well fracturing
sectional acid fracturing and reconstruction
