涩北一号气田第四系Ⅲ-3层组剩余气定量描述  

Quantitative characterization of remaining gas in Ⅲ-3 Member,No.1 Sebei gasfield

作　　者：张勇年[1] 连运晓 顾端阳 马元琨 李雪琴 刘国良 Zhang Yongnian;Lian Yunxiao;Gu Duanyang;Ma Yuankun;Li Xueqin;Liu Guoliang(Exploration and Development Research Institute,PetroChina Qinghai Oilfield Company,Dunhuang,Gansu 736202,China)

机构地区：[1]中国石油青海油田公司勘探开发研究院

出　　处：《天然气技术与经济》2019年第5期54-61,共8页Natural Gas Technology and Economy

基　　金：“十三五”国家重大专项课题“疏松砂岩气藏长期稳产技术”（编号2016ZX05015-004）

摘　　要：为了充分认识柴达木盆地涩北气田剩余气富集规律和分布特征,为该气田开发后期的持续稳产提供保障,通过运用数值模拟技术,针对涩北一号气田第四系III-3层组开展剩余气定量描述研究,以期为今后该气田的有效开发提供挖潜方向及调整思路。研究结果表明:①涩北一号气田第四系III-3层组水体大小为30倍水体;②运用渗吸相渗代替驱替相渗使得数值模拟模型更为准确可靠;③剩余气分布与原始储量丰度、构造位置、开发程度、水侵程度等多种因素都有关系;④采用储量丰度和含水饱和度相结合的方式,对剩余气储量分四级进行评价;⑤依据剩余气评价结果,在剩余气富集区内设计不同调整方案,在优选方案的基础上,选取2口新井优先实施,现场投产效果较好。结论认为:涩北气田的持续稳产离不开对剩余气的挖潜,通过研究提出的剩余气定量描述方法,可以为后期剩余气开发提供一种新的思路。In order to full understand both accumulation laws and distribution characteristics of remaining gas in Sebei gasfield and provide the guarantee for continuous and stable production in the late development stage,we quantitatively characterized the remaining gas inⅢ-3 Member of this field by means of numerical simulation,and provided potential tapping direction and adjustment ideas for effective development.Results show that(1)the multiple of waterbody inⅢ-3 Member is 30;(2)replacing the displacement relative permeability with the imbibition relative permeability may make numerical simulation models more accurate and reliable;(3)remaining-gas distribution is related to many factors,e.g.original reserve abundance,structural location,development degree,and water invasion degree;(4)remain ing-gas reserves can be subdivided into four evaluation classes by combining reserve abundance with water saturation;and(5)according to evaluation results,different adjustment schemes are developed for remaining-gas-accumulated areas.Based on the selected scheme,two new wells are firstly treated,and their commissioning effects are better.In conclusion,the continuous and stable production of Sebei gasfield is inseparable from the potential tapping of remaining oil.The proposed method for quantitative characterization of remaining gas may provide new ideas for its late development stage.

关 键 词：涩北气田 疏松砂岩 剩余气 数值模拟 开发调整 

分 类 号：TE3[石油与天然气工程—油气田开发工程]