高含非烃气体气藏连通单元划分方法研究——以DF1-1气田莺歌海组气藏为例  

Study on the Division Method of Connected Units in High Non-Hydrocarbon Gas Reservoirs:A Case Study of Yinggehai Formation Gas Reservoir in DF1-1 Gas Field

作　　者：高达 刘叶 戚志林 李继强 尹冰毅 GAO Da;LIU Ye;QI Zhilin;LI Jiqiang;YIN Bingyi(Hainan Branch of CNOOC(China)Co.Ltd.,Haikou 570312,China;School of Petroleum and Natural Gas Engineering The Key Laboratory of Complex Oil and Gas Field Exploration and Development of Chongqing Municipality,Chongqing University of Science and Technology,Chongqing 401331,China)

机构地区：[1]中海石油(中国)有限公司海南分公司,海口570312 [2]重庆科技学院石油与天然气工程学院复杂油气田勘探开发重庆市重点实验室,重庆401331

出　　处：《重庆科技学院学报（自然科学版）》2022年第2期52-57,105,共7页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：重庆市技术创新与应用发展专项面上项目“大型天然气地下储集装备研发”(CSTC2020JSCX-MSXMX0189)。

摘　　要：为了弥补现有气藏连通性评价方法的不足,提出一种适用于高含非烃气强非均质气藏的连通单元划分新方法。以DF1-1气田莺歌海组气藏为例,结合气藏流体初始分布特征及生产变化特征,研究产出气组成差异较大气井的井间连通性,进而划分连通单元。其中,以砂体展布特征初步划分连通单元,以气体组成特征确定单元内气井间的连通性,以压力变化特征验证单元内气井间的连通性。研究发现,高含非烃气体气藏的流体分布特征及其生产变化特征比较复杂,其中产出流体组分差异较大的气井也有可能属于同一连通单元。In order to make up for the insufficiency of the existing gas reservoir connectivity evaluation methods,the method of dividing the connected units of highly non-hydrocarbon gas reservoirs with strong heterogeneity is proposed.Taking the Yinggehai Formation gas reservoir in the DF1-1 gas field as an example,combining with the initial distribution characteristics of gas reservoir fluid and the change characteristics with production,the inter-well connectivity of gas wells with large difference in produced gas composition is studied,and then the connected units are divided.Among them,the connected units are preliminarily divided by the distribution characteristics of sand bodies,the connectivity between gas wells in the unit is determined by the characteristics of gas composition,and the connectivity between gas wells in the unit is verified by the characteristics of pressure change.The study results show that,for high non-hydrocarbon gas reservoirs,due to the complexity of fluid distribution and variation characteristics,the gas wells with different fluid components may also belong to the same connected unit.

关 键 词：莺歌海组 高含非烃气体气藏 流体组成 连通性评价 

分 类 号：TE332[石油与天然气工程—油气田开发工程]