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马寨油田卫９５块是典型的低渗透复杂断块砂岩油藏，已进入高含水期，水驱动用程度较低。为了提高水驱采收率，根据卫９５块地质特征等研制了纸浆系列调剖剂，确定了与之配套的选井、选层原则及四段封堵最佳注入方式等调剖工艺技术，提高了水驱波及体积。卫９５块经调剖后，含水上升率由２．４％降至１．５４％，水驱动用程度提高了６．３个百分点，自然递减率由２３．６％降至２１．１％，可采储量增加了４４×１０４ｔ，水驱采收率由标定的３１．５％提高到３８．１％，增油２１６３８ｔ。卫９５块调剖的投入产出比为１∶７．３，经济效益显著。研究表明：对于注水开发的低渗透、低孔隙度油田，利用调剖工艺提高水驱采收率是技术可行、经济实惠的。
Wei-95 block in Mazhai Oilfield is a typical low-permeability complex fault block sandstone reservoir that has entered a high water cut period with a low degree of water-driven use. In order to improve the recovery efficiency of waterflooding, a series of profile control agents were developed according to the geological characteristics of Wei 95, and the matching well selection and selection principles and the optimal injection mode of four-stage plugging were determined. Increased water flooding and volume. After the profile of Wei 95 was profiled, the rate of water cut decreased from 2.4% to 1.54%, the degree of water-driven use increased by 6.3%, and the rate of natural decline decreased from 23.6% to 21.1% Recoverable reserves increased by 44 × 104t, waterflood recovery increased from 31.5% to 38.1%, 21638t. Wei 95 profile control input-output ratio of 1: 7.3, significant economic benefits. The research shows that it is technically feasible and economical to improve waterflood recovery by profile control technology for low permeability and low porosity oilfields developed by waterflooding.