裂缝-孔隙型碳酸盐岩气藏稳态产能评价方法  

Steady Productivity Evaluation Method of Fractured-porous Carbonate Gas Reservoirs

作　　者：刘荣和 张文彪 冷有恒 Liu Ronghe;Zhang Wenbiao;Leng Youheng(CNPC Chuanqing Drilling Engineering Co.,Ltd.,Chengdu,Sichuan 610051,China;CNPC(Turkmenistan)Amu Darya Gas Company,Beijing 100000,China)

机构地区：[1]中国石油川庆钻探工程有限公司,四川成都610051 [2]中国石油(土库曼斯坦)阿姆河天然气公司,北京100000

出　　处：《特种油气藏》2022年第2期122-127,共6页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“土库曼斯坦阿姆河右岸裂缝孔隙(洞)型碳酸盐岩气藏高效开发关键技术研究与应用”(2017ZX05030-003)。

摘　　要：针对常规气藏产能方程难以准确评价裂缝-孔隙型碳酸盐岩气藏产能的问题,利用Kazemi模型简化裂缝-孔隙型碳酸盐岩气藏渗流模型,根据气体在裂缝与基质层中的不同流动状态,将双重介质复杂渗流分解为基质层线性渗流与水平裂缝径向渗流,建立了综合考虑裂缝渗透率、裂缝开度、裂缝条数及窜流系数的裂缝-孔隙型碳酸盐岩气藏稳态产能方程,开展气井产能敏感性分析研究。结果表明:气井无阻流量随着裂缝渗透率、开度及条数的增加而增大,且两者呈正向线性关系;随着窜流系数不断增加,气井无阻流量也不断增大,当窜流系数大于5×10^(-9)时,气井无阻流量基本无变化。该研究为裂缝-孔隙型碳酸盐岩气藏稳态产能预测提供了新的解决思路。Since conventional gas reservoir productivity equation is difficult to accurately evaluate the productivity of fractured-porous carbonate gas reservoirs,Kazemi model was adopted to simplify the seepage model of fractured-porous carbonate gas reservoirs,the dual-medium complex seepage was decomposed into the linear seepage in substrate layer and the radial seepage in horizontal fractures according to the different flow states of gas in fracture and substrate layer,the steady productivity equation of fractured-porous carbonate gas reservoirs was established with consideration of fracture permeability,fracture opening,fracture number and channeling coefficient,and the productivity sensitivity of gas wells was analyzed.The results showed that the open-flow capacity increased with the increase in the permeability,openness and number of fractures,presenting a positive linear relationship;the open-flow capacity of gas wells increased with the increasing channeling coefficient,and remained unchanged when the channeling coefficient was greater than 5×10^(-9).This study provides a new solution for steady productivity prediction of fractured-porous carbonate gas reservoirs.

关 键 词：裂缝-孔隙型 产能评价 Kazemi模型 稳态产能 裂缝开度 窜流系数 

分 类 号：TE822[石油与天然气工程—油气储运工程]