生物酶解堵技术在海上油田的应用及效果分析

Application and effect analysis of bio-enzyme blocking removal technology in offshore oilfield

渤海P油田为复杂小断块稠油油田,大部分区块为天然能量开发。油井在生产过程中随着温度压力下降,有机质容易析出,对筛管表面、近井地带造成堵塞,引起产量下降。目前海上常规的增产措施面临设备投入大、程序复杂、耗能高,油藏易受到伤害,采出液处理难度大等问题。为此开展了生物酶解堵技术研究,生物酶是由酶主导的多种生物化合物组成的水溶性产品。室内实验及现场应用表明生物酶具有非常高的释放储层岩石颗粒表面碳氢化合物的能力,可以改变岩石的润湿状态,大幅提高驱油效率,具有安全、高效、施工方便等优点,具有广阔的应用前景。

Bohai P oilfield is a complex small fault block heavy oilfield, and most of the blocks are developed with natural energy. With the decrease of temperature and pressure in the production process of oil wells, organic material is easy to precipitate, blocking the screen surface and near-well bore region and causing a decrease in production.Conventional stimulation measures have problems such as large investment in equipment, complicated procedures, high energy consumption, easy damage to oil reservoirs, and difficult treatment of produced fluids. Thus, research on bio-enzyme blocking removal technology is carried out,biological enzymes are water-soluble products composed of various biological compounds dominated by enzymes. Laboratory experiments and field applications show that bio-enzymes have a very high ability to release hydrocarbons on the surface of reservoir rock, and can change the wetting state of rocks, thus greatly improve the oil displacement efficiency. The biological enzyme blocking removal technique has the advantages of safety, high efficiency and convenient construction,and provides a good direction for offshore oilfield stimulation measures.