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稠油排砂冷采是80年代末90年代初从加拿大发展起来的一项稠油开采新技术。该技术属一次采油范畴,适用于疏松砂岩稠油油藏,具有日产油量高、开采成本低的特点。其主要开采机理是:通过诱导油层大量出砂,形成高渗透的“蚯蚓洞”网络,日产油量是常规降压开采的数倍至数百倍,在200m左右井距下的采收率一般可达10%～20%,接近于100m井距下蒸汽吞吐采收率。
Heavy oil drainage and sand production is a new heavy oil recovery technology developed from Canada in the late 1980s and early 1990s. The technology is an oil field, suitable for unconsolidated sandstone heavy oil reservoirs, with the characteristics of high daily oil production and low mining cost. The main mining mechanism is: by inducing a large number of sands out of the reservoir to form a high permeability “earthworm hole” network, daily oil production is several times to conventional buck mining several times, at a well spacing of about 200m The rate is generally up to 10% ~ 20%, close to the 100m well under the steam huff and puff recovery rate.