井间示踪剂大孔道识别及剩余油饱和度分布技术

中原油田胡7南块非均质性严重，大量注水后，储层出现大孔道现象，使注入水沿大孔道短路循环，注入水效率低，水驱波及体积小，加剧了层内、层间矛盾，导致油井含水上升快，水驱动用程度低。为了制订一系列有效的调整方案，提高水驱油效率，决定对胡7南块的7—21、7—189、7—112、7—121四个井组投放示踪剂，利用井间示踪剂大孔道识别及剩余油饱和度分布解释软件描述高渗透水淹层(即大孔道)的厚度、渗透率、孔道半径，并解释剩余油饱和度的分布情况，从而为调剖堵水提供有效依据。

Tracer-Oriented Pore Passage Identification and Remainder Oil Saturation Distribution Technologies

Since Hu 7 south block is a very heterogeneous oilfield,big pore passages appear after large volume injection,which makes the injected water to push in along the pore passage short circuit,decreases the injection and sweep efficiency,and hence furthers the contradictions within or between formations.This always results in rapid increasement of water cut in production wells and brings about difficulties in water drive production.In order to design a series of effective adjustment scenarios to improve water drive efficiency,the tracer is proposed to be put in four well groups:7-21,7-189,7-112 and 7-121.And by using tracer oriented pore passage identification software and oil in place distribution interpretation software,the properties of highly permeable water flooded formations(large pore passage)like thickness,permeability,radius of pore passage are described,and the distribution of remainder oil saturation is also illustrated to furnish available data for water plug and profile control.