轻质油藏注空气燃烧管试验

燃烧管试验是注空气评价过程中的重要试验,其目的是研究注空气过程中原油在地层条件下的燃烧情况.在Calgary大学长1 m、渗透率为1.457 μm2的填砂管中,对鄯善轻质油藏原油进行注空气燃烧管试验.分析了提高原油采收率和维持燃烧所需要的燃料、产出气的组成、产出油和水的量以及注空气温度前沿推进速度.对脱气油注氮气,驱油效率可达到64%,在此基础上注空气,驱油效率可再提高23%,同时燃烧消耗10%的原油,但注空气时不能持续燃烧,进行二次点火后才可完成试验.

Combustion-tube test of air injection for light-oil resetvoir

Combustion-tube test is an important test for the assessment of air injection, and the objective of this test was to research the overall burning characteristics of crude oil at the reservoir pressure and temperature. Using light oil of Shanshan Oilfield, the combustion-tube test was done in sandpack column designed by Calgary University, and the length of sandpack column is 1 m and permeability is 1. 457 txm2, The incremental oil production, air and fuel requirements, the composition of produced gas, the amount of produced oil and water, and the velocity of temperature front were analyzed. The test results suggest that oil recovery efficiency is 64 percent of the original oil in place under the initial inert gas flood, and the enhanced oil recovery is 23 percent by air flood, at the same time, 10 percent crude oil is burned. Because the injected air can not combust continuously, the test is complished by second firing.