致密油资源评价新进展

New advance in resources evaluation of tight oil

致密油是继页岩气之后当下非常规油气领域的热点,全球致密油可采资源量达到473×108t。近年,北美地区致密油勘探开发技术进步显著,产量增加迅速,中国在致密油勘探也取得了明显成效。在致密油资源评价方面,国外已形成相对成熟的评价技术,总体以类比法和统计法为主,各有其优缺点和适用条件;国内,完善资源评价技术已成为致密油增储上产的当务之急。重点探讨了致密油资源评价方法及资源富集特点,初步形成了类比法、统计法、成因法3大类7种评价方法及评价参数体系,并采用新建立的分级资源丰度类比法、EUR类比法、小面元容积法,在四川、鄂尔多斯、松辽、准噶尔、渤海湾等致密油盆地进行了具体应用。初步评价结果表明,中国致密油资源潜力大,地质资源量达200×108t,具备规模化发展的资源基础。

Tight oil is currently the second hot spot for research of unconventional oil and gas resources,following shale gas.Global recoverable resources of tight oil are up to 47.3 billion tons.In recent years,North American has made significant progress in tight oil exploration and development technologies,accompanied by a rapid increase in tight oil production.Meanwhile,China has made remarkable achievements in tight oil exploration.Regarding the resources evaluation of tight oil,mature techniques are available overseas,mainly including the analogy and statistical methods with specific （dis）advantages and applicable conditions.In China,to develop recourse evaluation techniques has become a pressing task for increasing tight oil reserves and production.This article summarizes the resources evaluation methods and enrichment features of tight oil.Seven kinds of resources evaluation methods and parameter systems are classified into three categories,including the analogy,statistical,and genetic methods.Newly established hierarchical resource abundance analogy,EUR analogy,and small surface element volumetric method are applied to assess the tight oil basins of Sichuan,Erdos,Songliao,Junggar,and Bohai Bay.The resources evaluation results show that China posessses great potential of tight oil.There are 200 × 10^8 tons of geological resources,which form the foundation of resources for large-scale development.