胶态分散凝胶在马21断块砂岩油藏调驱中的应用

报道了由HPAM和金属离子，酚醛树脂组成的胶态分散凝胶（CDG）的基本组成，形成条件和性能参数，介绍了冀中河间马21断块间145井组CDG调驱设计要点（注入压力，段塞组成，注入量及注入工艺）及实施情况，分析了该井组CDG调驱结果，调驱液包括前置段塞[聚合物／复合交联剂浓度为1200/240mg/L)，主段塞（800／100）及后置段塞（1000／200），总量3200m3)，注入时间24天，后续注水，间145井注入CDG后，对应3口油井先后见效，产油量增加，含水大幅度减少，水驱待特曲线表明后续水驱的波及效率和驱油效率都有所提高，本次CDG单井组调驱先导试验在经济上也是成功的。

Colloidal Dispersion Gel in Use as Permeability Adjusting/Oil Displacing Agentfor Sandstone Reservoirs at Fault Block Ma-21

An HPAM/metal ion/phenolic resin colloidal dispersion gel(CDG) is outlined for its basic composion, formation conditions and performance properties; the features(injection pressure, volume, plug structure, and technologic aspects) of CDG flood design at well net J 145 of fault block MA 21, Hejian, central Hebei, are described and an analysis of the results of the pilot test on CDG flood at well net J 145 is given. The flooding fluid consists of a pad slug (polymer/combinational crosslinker concentration in mg/L 1 200/240), a main slug(800/100), and a post slug(1 000/200). Injection into well J 145 of the CDG fluid in amount 3 200 m 3 over 24 days followed by water flood leads to increased oil productivity and dramatically decreased water cut in 3 production wells. It is shown that the CDG injected has improved both the sweeping and oil displacing effeciencies of successive flooding water. The CDG pitol test is economically benificial.