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2007年在扶余油田探40区块初次开展了热采试验,取得了非常好的效果。但也存在一些制约热采开发效果及安全因素,部分井发生汽窜,导致吞吐井加热半径缩小、热利用率降低,影响吞吐井的生产效果。为了提高热采效果,避免汽窜发生,开展了适合于扶余油田的复合体系调剖技术的研究。国内稠油油藏汽窜封堵技术的应用实践表明,单一的高温堵剂现场应用效果不理想,有效期短。因此考虑应用聚合物凝胶+预交联体膨性颗粒+粉煤灰/固化剂复合型高温汽窜封堵体系,并先期在实验室开展了复合调剖体系配伍性、抗温性、封堵性实验。在现场试验取得显著效果的基础上,2011~2013年,应用该项技术在探40区块、东9汽窜严重区块开展实施了复合封堵调剖应用,累计实施130口井,没有发生汽窜,平均单井日增油0.7t/d,平均单井累计年增油115t。
In 2007, the thermal recovery test was carried out for the first time in Block 40 of Fuyu Oilfield and achieved very good results. However, there are also some factors restricting the development and safety of thermal recovery. In some wells, steam channeling occurs, resulting in the reduction of the heating radius of the stimulation wells and the decrease of thermal utilization rate, which affects the production efficiency of the stimulation wells. In order to improve the effect of thermal recovery, to avoid the occurrence of steam channeling, carried out suitable for Fuyu Oilfield composite system profile control technology research. The application practice of domestic steam oiling and plugging technology of heavy oil reservoirs shows that the single high temperature plugging agent has unsatisfactory on-site application effect and short effective period. Therefore consider the application of polymer gel + pre-crosslinked bulk particles + fly ash / curing agent composite high-temperature steam channeling plugging system, and early in the laboratory carried out a composite profile control system compatibility, temperature resistance, sealing Plugging experiment. On the basis of the remarkable results achieved in the field test, from 2011 to 2013, the application of this technology in the exploration block 40, East 9 steam channeling serious block implementation of the implementation of a composite blocker profile control application, the cumulative implementation of 130 wells, did not happen Steam channeling, the average daily oil well 0.7t / d, the average single-well cumulative increase of 115t oil.