摘要
文明寨油田是一个复杂的断块油田，明六块是其主力区块，经过１５年的注水开发，层间矛盾突出，水驱动用程度低。该文从明六块储层物性认识入手，选择３口取心井的１８块岩心做了“五敏实验”，并利用井间示踪剂技术研究了储层物性。研究表明明六块在一定程度上存在着水敏、速敏、酸敏、弱碱敏和弱盐敏现象。得出该区块储层的临界流速为１１．８ｍ／ｄ。在此基础上提出了一系列提高采收率的工艺措施。通过实施，有效地控制了产量递减速度和含水上升速度，效果显著。明六块的开发实践，对于高含水期复杂断块油藏利用物性资料提高采收率具有重要的指导意义。
Wenmingzhai oilfield is a complicated fault block oilfield, its main unit is block Ming 6. After 15 years' development by water flooding, its interlayer uneven is outstanding and the producing reserve is less. Based on the knowledge of physical property of block Ming 6, “Five Sensitivity Experiment”has been performed for 18 cores selected from 3 wells, the formation property has been researched by sand samples analysed and interwell tracer technology in this paper. It shows that there is some water sensitivity, some velocity sensitivity, some acid sensitivity, a little alkali sensitivity and no salt sensitivity in block Ming 6. The critical flow velocity in this block 11.8 m/d is determined,then a series of EOR techniques are suggested. Through practice, its effect is obvious on controlling production decline and water cut rising. The development practice of block Ming 6 proves that it has important guiding significance for using physical property information to enhance oil recovery in complicated fault block reservoirs during high water cut stage.
关键词
提高采收率
物性参数
断块油田
EOR, physical parameter, fault block oilfield
