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Evaluation of gas wettability and its effects on fluid distribution and fluid flow in porous media

ISSN号：1672-5107
期刊名称：Petroleum Science
时间：2013.12.12
页码：515-527
分类：TQ637[化学工程—精细化工] TE311[石油与天然气工程—油气田开发工程]
作者机构：[1]State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China, [2]MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
相关基金：supported by the Basic Research on Drilling ＆ Completion of Critical Wells for Oil ＆ Gas （Grant No. 51221003）; National Science Fund for Petrochemical Industry （Project No. U1262201）; “863” National Project （Project No. 2013AA064803）; National Science Fund for Distinguished Young Scholars （Project No. 50925414）; National Natural Science Foundation （Project No. 51074173）
相关项目：洗井、固井、油层等损害与保护

关键词：岩石润湿性, 渗流效应, 流体, 毛细管压力, 特殊气体, 评价, 低表面能, 表面自由能, Gas-wetting,fluorocarbon copolymer,contact angle,capillary pressure,surface free energy,surface property,fluid flow in porous media

中文摘要：

The special gas wettability phenomenon of reservoir rocks has been recognized by more and more researchers.It has a significant effect on efficient development of unconventional reservoirs.First,based on the preferentially gas-covered ability and surface free energy changes,definition and evaluation methods have been established.Second,a method for altering rock wettability and its mechanisms have been studied,surface oriented phenomena of functional groups with low surface energy are the fundamental reason for gas wettability alteration of rock.Third,the effect of gas wettability on the surface energy,electrical properties and dilatability are investigated.Last,the effects of gas wettability on capillary pressure,oil/gas/water distribution and flow are investigated with capillary tubes and etchedglass network models.The gas wettability theory of reservoir rocks has been initially established,which provides theoretical support for the efficient production of unconventional reservoirs and has great significance.

英文摘要：