产气微生物提高原油采收率微观实验研究

MICROSCOPIC MODELLIMG STUDY ON MECHANISMS OF MEOR BY GAS-PRODUCIMG MICROBE

本文首次介绍了产气微生物提高原油采收率微观机理的实验研究结果。通过在显微镜下观察、拍照和录相，考察了产气微生物在微观模型中产气及水、油、气之间的复杂驱替现象。总结了产气微生物除明显提高油层压力外的其它驱油机理。

The microscopic mechanisms of oil displacement by gas-producing microbe 5GA ate studied in a transpatrent micrscopic midel and the results obtained are descibed water,gas and gas-priduing microbe which lesd to oil displacement are observed,photobrghed and vidiocordered undermicroseope. The mechaniams involved in residual oil displacement by gas produced, besides of enhancement in reservoir pressure ,are summerized as follows : ( 1 ) deformation ,coaleacence and collection of oil drops to from flowable stream under driving forces of ever-produced gas; (2) abhesi on of msiduall oil onto bubble film and flowing out together with gas strea,; (3) microbe moving into on-gores and produced gas dribing resifual oil out from these pores unaceesible for other flooding fuids.