摘要
稠油具有黏度大、流动性差等特点,导致开采难度增大、采收率降低等问题出现。目前,注二氧化碳驱替稠油技术已在各大油田得到广泛应用,取得了一定效果,但实际应用与未来发展也面临一定挑战。驱油机理方面,二氧化碳可用于稠油开采,主要通过降黏、溶解等作用增强稠油的流动性。驱替技术方面,二氧化碳驱替稠油开采技术按介质个数可以分为一元驱替、二元复合驱替、三元协同驱替。二氧化碳吞吐技术是驱替普通稠油的主要方式;非均质性较强的特稠油、超稠油,需加入蒸汽、化学试剂等物质综合作用;“CO_(2)+”多元介质复合驱替技术是未来的发展趋势。实践效果方面,二氧化碳辅助三元协同驱替稠油技术采收率最高。二氧化碳辅助驱替稠油技术主要应用于普通稠油油藏,未来应在深层超稠油开采的适应性、二氧化碳埋存等方面加强理论研究和先导试验。
Heavy oil has the characteristics of large viscosity and poor fluidity,which leads to increased difficulty in exploitation and reduced recovery.At present,the carbon dioxide injection technology for heavy oil displacement has been widely used in major oilfields.It has achieved certain results,but the practical application and future development also face challenges.In terms of oil displacement mechanism,carbon dioxide can be used for heavy oil recovery,mainly by reducing viscosity and dissolving to enhance the fluidity of heavy oil.Regarding displacement technology,carbon dioxide flooding for heavy oil recovery can be divided into oneelement flooding,binary combination flooding,and ternary cooperative flooding according to the number of media.Carbon dioxide huff and puff is the main way to ordinary heavy oil displacement.For the extra heavy oil and super heavy oil with strong heterogeneity,steam,chemical reagents,and other substances must be added for comprehensive action;"CO_(2)+"multi-media compound flooding is the future development trend.Regarding the practical effect,carbon dioxide-assisted ternary cooperative flooding for heavy oil has the highest recovery rate.Carbon dioxide-assisted heavy oil displacement technology is mainly used in common heavy oil reservoirs.In the future,theoretical research and pilot tests should be strengthened in adaptability to deep super-heavy oil recovery and carbon dioxide storage.
作者
胡海光
Hu Haiguang(College of Petroleum Engineering,Xi'an Shiyou University,Xi'an Shaanxi 710065)
出处
《中外能源》
CAS
2024年第6期52-56,共5页
Sino-Global Energy
关键词
稠油开采
二氧化碳驱替
二氧化碳吞吐
二元复合驱替
三元协同驱替
采收率
heavy oil recovery
carbon dioxide flooding
carbon dioxide huff and puff
binary compound flooding
ternary cooperative flooding
recovery rate
