新疆芦草沟组致密油赋存形式及可动用性评价  

Tight oil occurrence form and recoverability evaluation of tight oil reservoir in Lucaogou Formation of Xinjiang

作　　者：闫林[1] 冉启全[1] 高阳[2] 陈福利[1] 王少军[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油新疆油田分公司,新疆克拉玛依834000

出　　处：《油气藏评价与开发》2017年第6期20-25,33,共7页Petroleum Reservoir Evaluation and Development

基　　金：国家重点基础研究发展计划(973计划)"陆相致密油甜点成因机制与精细表征"(2015CB250901)

摘　　要：在对准噶尔盆地吉木萨尔凹陷二叠系芦草沟组致密油微观赋存形式、流动喉道下限及可动用性开展的研究中,利用铸体薄片、扫描电镜技术确定致密油在储集层中有可动油、束缚油两种赋存类型,可观察到薄膜状、颗粒状等六种微观赋存形式。利用水膜法、比表面法、启动压力梯度法等方法初步确定致密油流动喉道直径下限为100 nm;利用核磁共振、常规压汞、高压压汞技术定量评价致密油可动用程度主要集中在20%~40%。结论认识对研究区致密油储层评价、有效开发具有积极的指导作用。In the researches on the micro occurrence form, flow throat and recoverability of the tight oil of Permian Lucaogou formation in Jimusar Sag, Junger basin, two occurrence types of mobile oil and immobile oil were found to be existed in the tight oil reservoir by using the cast thin slice and scanning electron microscope technology. Meanwhile, six micro occurrence forms, such as thin film shape and granulose shape were observed. And then, the throat diameter was determined as 100 nm by the methods of water film method, specific surface method and starting pressure gradient. Furthermore, the recoverability of tight oil, mainly concentrated in 20 % ~ 40 %, was quantitative evaluated by the nuclear magnetic resonance, the conventional mercury injection and the high pressure mercury injection technology. The conclusion has positive guiding effects on the evaluation and efficient development of the tight oil reservoir in the research area.

关 键 词：致密油 赋存状态 可动流体 吉木萨尔凹陷 芦草沟组 

分 类 号：TE133.1[石油与天然气工程—油气勘探]