塔河超深层中质油对稠油降粘的适应性

Adaptability of medium-density oil to the thinning of heavy oil

针对塔河油田超深层油藏地质特点和原油性质,以TK1073、TH10227及TH12312井稠油和4种塔河稀油为研究对象,采用流变学方法,测试分析原油的流变特性及粘温特性,评价不同塔河稠油分别掺入不同量的一厂DK4、一联、1#和2#混合油4种塔河稀油的降粘效果,探讨轻质油及混配中质油对塔河稠油降粘的适应性,以达到扩大稀油源、节约轻质油的目的。研究结果表明:TK1073与TH12312井稠油属超稠油,TH10227井稠油属特稠油,其生产与集输必须采取掺稀等降粘措施;一厂DK4轻质油、一联中质油及1#混合中质油对塔河稠油掺稀降粘具有较好的适应性,而2#混合中质油则相对较差。实际应用证实了室内研究结论的可靠性。

In the light of the geological characteristic of ultra-deep strata reservoir of Tahe Oilfield and crude oil property, taking heavy oils in the TK1073, TH10227 and TH12312 wells and 4 kinds of Tahe thin oils as research objects, rheological characteristics and viscosity- temperature characteristics of crude oil are tested and analyzed by rheological methods, viscosity reduction effects of different Tahe heavy oils respectively mixed with different volumes of Tahe thin oils, including No.1 Oil Production Plant DK4, No.1 Multi-purpose Station, No.1 and No.2 mixed oils are evaluated. The applicability of light oil and mixed medium-density oil to the thinning of Tahe heavy oil is discussed to expand thin oil sources and save light oil. Research results indicate that heavy oil in TK1073 and TH12312 wells are extremely heavy oils and heavy oil in TH10227 well is extra heavy oil, of which production and gathering must be given thin oil mixture and other thinning measures. No.1 Oil Production Plant DK4 light oil, No.1 Multi-purpose Medium-density Oil and No.1 Mixed Medium-density Oil are provided with the better applicability to the thinning of Tahe heavy oil by blending with thin oil, while No.2 Mixed Medium-density Oil is relatively poor. Reliability of laboratory study conclusions are confirmed by actual applications.