龙凤山特低孔特低渗凝析气藏反凝析伤害实验研究  

Experimental Study on Retrograde Condensate Damage of Longfengshan Extra-low Porosity and Extra-low Permeability Condensate Gas Reservoir

作　　者：张冲[1,2] 宋宪实 汤勇[2] ZHANG Chong;SONG Xianshi;TANG Yong(Petroleum Environmental Engineering Technology Research Institute of Northeast Oil&Gas Branch,Sinopec,Changchun,Jilin 130072,China;The State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation Engineering,Chengdu,Sichuan 610500,China)

机构地区：[1]中国石油化工股份有限公司东北油气分公司石油环保工程技术研究院,吉林长春130072 [2]油气藏地质及开发工程国家重点实验室(西南石油大学),四川成都610500

出　　处：《西安石油大学学报（自然科学版）》2020年第2期50-53,97,共5页Journal of Xi’an Shiyou University（Natural Science Edition）

摘　　要：通过对龙凤山特低孔特低渗凝析气藏反凝析相行为研究,分析了该油藏流体的相态特征和反凝析相变过程,通过反凝析污染伤害程度实验测试评价了反凝析对气藏开发的影响。研究结果表明,反凝析污染将会导致气相渗透率大幅度降低,最高仅为开发初期的1/6;反凝析伤害主要发生于露点压力至25 MPa阶段,占总伤害比例77%,即衰竭开发早期该气藏极易发生严重的反凝析伤害。Based on the study of the retrograde condensate phase behavior of Longfengshan ultra-low porosity and ultra-low permeability condensate gas reservoir,the phase behavior characteristics and the retrograde condensate phase transformation process of the reservoir fluid are analyzed,and the influence of retrograde condensate on the development of the gas reservoir is evaluated through the experimental test of pollution damage of retrograde condensate.The results show that the retrograde condensate pollution will lead to a significant reduction of gas permeability.When the formation pressure drops to 7 MPa,the gas permeability is only 1/6 of that in the early stage of development;the retrograde condensate damage mainly occurs in the pressure segment from dew point pressure to 25 MPa,the damage of gas permeability caused by which accounts for 77%of the total damage,that is,the gas reservoir is prone to serious retrograde condensate damage in the early stage of depletion development.

关 键 词：凝析气藏 特低孔特低渗凝析气藏 相态特征 反凝析伤害 

分 类 号：TE372[石油与天然气工程—油气田开发工程]