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我国的油气资源与国外相比,非均质严重、储层分散,且埋藏深、黏度大、渗透率低。我国缺少整装大型油田,大庆原油黏度在国内已属相对较低的,可依然比美国通常的原油黏数倍。据不完全统计,在2009年、2010年、2011年的石油新增储量中,低渗透和特低渗透分别占78%、63%、78%。2007年的统计数据则显示,全国新老油田的平均含水率已经高达86%,其中大庆、胜利等很多老油田都超过90%。
Compared with other countries, China’s oil and gas resources are highly heterogeneous, with scattered reservoirs, deep burial, high viscosity and low permeability. In our country, there is a lack of large-scale integrated oilfields. Daqing crude oil has a relatively low viscosity in China and can still be several times more viscous than the crude oil in the United States. According to incomplete statistics, low oil infiltration and low oil infiltration account for 78%, 63% and 78% of the total new oil reserves in 2009, 2010 and 2011, respectively. Statistics from 2007 show that the average moisture content of new and old oil fields in China has reached as high as 86%, of which, more than 90% of the old oil fields such as Daqing and Shengli have been built.