凝析气藏高压物性及反凝析污染评价实验  

Evaluation experiment of high pressure physical properties and reverse condensate pollution of condensate gas reservoir

作　　者：王威翔 周志军[1,2] 张祺 王胜男 李殊雨 WANG Weixiang;ZHOU Zhijun;ZHANG Qi;WANG Shengnan;LI Shuyu(College of Petroleum Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Central Laboratory of the Eighth Operation Area of Daqing No.1 Oil Extraction Plant,Daqing Heilongjiang 163255,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [3]大庆第一采油厂第八作业区中心实验室,黑龙江大庆163255

出　　处：《石油化工应用》2023年第9期45-49,共5页Petrochemical Industry Application

基　　金：国家科技重大专项“低物性段改造酸化压裂技术研究”(2016ZX05012-002-006);东北石油大学国家基金培育基金“济阳坳陷泥页岩微观孔隙结构特征及流动机制研究”(2018GPYB-02)。

摘　　要：为了评价反凝析对凝析气藏开发的影响,通过M区块凝析气藏的高压物性实验,研究了反凝析相态变化,进而分析流体的相态特征和反凝析变化过程。通过长岩心驱替实验进一步开展反凝析污染评价来分析反凝析影响因素。研究表明,温度的升高可以减缓不同压力级之间的反凝析液量差异;考虑应力敏感,在凝析油处于临界流动饱和度附近的情况下,反凝析现象对基质的影响相对较大,而对裂缝岩心的影响则相对较小;近井地带比远井地带更容易发生反凝析污染且污染程度更高,但随着凝析油含量的增加,近远井污染程度差异减小。研究成果为评价凝析气藏反凝析污染提供了方法和思路。In order to evaluate the influence of reverse condensate on the development of condensate gas reservoir,the change of reverse condensate phase was studied through the high pressure physical property experiment of M block condensate gas reservoir,and then the phase characteristics of fluid and the change process of reverse condensate were analyzed.The influence factors of reverse condensate were analyzed by further evaluation of reverse condensate pollution through long core displacement experiment.The results show that the increase of temperature can reduce the amount difference of reverse condensate between different pressure levels.Considering the stress sensitivity,when condensate is near the critical flow saturation,the reverse condensate phenomenon has a relatively large effect on the matrix,but a relatively small effect on the simulated fractured core.The near-well area is more prone to reverse condensate pollution than the far-well area and the pollution degree is higher.However,with the increase of condensate concentration,the difference of pollution degree between near-well and far-well will decrease.The research results provide methods and ideas for evaluating reverse condensate pollution of condensate gas reservoirs.

关 键 词：凝析气藏 高压物性实验 相态特征 长岩心驱替实验 反凝析污染 

分 类 号：TE353.3[石油与天然气工程—油气田开发工程]