靖边气田南部非边底型地层水分布主控因素及预测  

Non edge and bottom aquifer controlling factors and distribution forecast in southern Jingbian gas field

作　　者：夏勇[1] 袁继明[1] 夏勇辉[2] 张芳[1] 王华[1] 崔越华[1] 

机构地区：[1]中国石油长庆油田公司勘探开发研究院低渗透油气田勘探开发国家工程实验室,陕西西安710018 [2]中国石油长庆油田公司气田开发处,陕西西安710018

出　　处：《东北石油大学学报》2015年第2期1-8,137,共8页Journal of Northeast Petroleum University

基　　金：中国石油天然气集团公司科技重大专项(2011E-1306)

摘　　要：在分析气井产水特征的基础上,研究靖边气田南部马五1+2气藏地层水分布主控因素,提出非边底型地层水分布预测方法,划分气水分布类型.结果表明:地层水主要为气水同层,纵向上主要位于马五31,平面上主要分布于区块中—东北部;气田分布受成藏背景、地质结构、小幅度构造及储层含气性等因素控制,成藏构造背景是相对富水的基本条件,不整合面地质结构控制气水聚集形式,中部大面积分布的盖层遮挡气水运移通道,小幅度构造对气水分布进行局部微调整,储层含气性差异体现地层水充注程度.根据产水井点分布、地质结构位置、小幅度构造部位、含气饱和度等指标,将研究区划分为3种类型:相对富水区,主要位于古地貌缓坡区、小幅度构造低部位且含气饱和度低于50%的区域;产水低风险区,位于西部剥蚀区和东侧洼地区、含气饱和度高于50%区域;产水高风险区,介于两者之间.该研究对靖边气田南部勘探开发及生产措施制定具有指导意义.In order to forecast the distribution of Mawu1+2 gas reservoir in southern Jingbian gas field,based on the analysis on the characteristics of gas wells producing water,this paper deals with the mechanism and controlling factors of the aquifer,and predicts the distribution of the non-edge and bottom aquifer.The aquifer mainly consists in gas-water same layer,mainly distributes within Mawu31 in the longitudinal direction and within Central-Northeast in block.Rich aquifer areas based on structure background for the formation of gas pool,unconformity geological structure control of gas water forms of aggregation,the distribution of the large cap rocks in the middle of area shielding the gas-water transport,partial adjustment of the gas-water distribution by low amplitude paleostructrue in the burial period.Gas saturation is mainly reflected factor of the formation filling degree.Based on the distribution of producing gas wells,position of the unconformity geological structure,position of low amplitude paleostructrue,gas saturation and other factors,the study area is divided into 3types:Relative water rich area,the region which mainly located in the karst slope,the low position of small structure and the below50% gas saturation;high water yield risk region,the area which is mainly located in the western karst highland and eastern karst depression,and the area of lager than 50% gas saturation;low water risk region,the area in between.The research has guiding significance to the formulation of exploration and production measures in southern Jingbian gas field.

关 键 词：靖边气田南部 马五1+2气藏 气水分布 控制因素 非边底型地层水 

分 类 号：TE121.2[石油与天然气工程—油气勘探]