用核磁共振研究低渗储层渗流能力及驱替机理

STUDY ON PERCOLATION CAPABILITY AND DISPLACEMENT MECHANISM WITH NUCLEAR MAGNETIC RESONANCE TECHNIQUE

吐哈盆地已投入开发的鄯善、丘陵、温米油田是典型的低孔、低渗透油田,目前均已进入中高含水递减阶段,针对这类储层的地质特征、渗流特点,首次应用核磁共振技术进行储层渗流能力及可动流体分布研究,确定其可动油饱和度分布,研究其影响因素,进而探讨低渗透储层驱替机理。对指导油田的合理开发和调整挖潜具有实际意义。

Shanshan, Qiuling and Wenmi oilfield in Tuha basin are all typical low porosity, low permeability ones, which have entered into medium to high water cut stage. Aiming at the geologic characteristics and percolation features of these reservoirs, nuclear magnetic resonance technique is used for the first time to investigate reservoir percolation capability and movable fluid distribution, and to determine the saturation distribution of movable oil and its influencing factors, then to probe the displacement mechanism of the low permeability reservoirs. The study has practical meanings in directing the proper development and adjustment of the oilfields.