聚驱后剩余油再认识及挖潜技术应用

FURTHER UNDERSTANDING OF REMAINING OIL AFTER POLYMER FLOODING AND THE APPLICATION OF POTENTIAL TAPPING TECHNOLOGY

在充分研究油层沉积特点的基础上，应用储层描述技术对典型区块进行层内建筑结构解剖，描述聚驱后剩余油分布特征，对聚驱后剩余油进行再认识，并将聚驱后剩余油再认识成果应用于措施挖潜中。通过实施成熟技术，探索新技术，实现挖潜对象由层间深入到层内，由层内深入到结构单元，最大限度地挖掘聚驱后剩余储量。试验表明，对聚驱后剩余油挖潜工作应采用配套调整技术，配套技术的核心是通过井组间、层系间、厚油层内部匹配调整，扩大注入水波及体积，改变液流方向，提高油层动用程度。

Based on full research on sedimentary features of oil layer and through the application of fine reservoir description technology, remaining oil is newly recognized by dissecting intraformational architecture of typical blocks and the description of remaining oil distribution after polymer flooding. The achievements of further under- standing of remaining oil have been applied into the measures of tapping potential. The target areas for potential tapping are deepened from interlayer to intralayer, and then from intralayer to structural unit by using mature technologies and exploring new technologies, so as to tap the remaining reserves after polymer flooding to the utmost. Experiments indicate that the matching adjustment technologies should be adopted to tap potential after polymer flooding, and the core of matching technologies is the adjustments between well groups, inter layer system and intra thick layers, in the hope of expanding waterflood swept volume, changing the flow direction of fluid and finally enhancing reservoir producing degree.