大牛地气田下石盒子组地层压力与天然气富集关系研究  

Study on Relationship between Formation Pressure and Natural Gas Enrichment in Lower Shihezi Formation of Daniudi Gasfield

作　　者：景琛 孙文凯[1] 李翔[1] 李光耀 陈斌[1] 孙拓 代福材 Jing Chen;Sun Wenkai;Li Xiang;Li Guangyao;Chen Bin;Sun Tuo;Dai Fucai(No.1 Gas Production Plant ,SINOPEC North China Oil &Gas Company ,Zhengzhou Henan 450006)

机构地区：[1]中国石化华北油气分公司采气一厂,河南郑州450006

出　　处：《中外能源》2019年第1期28-33,共6页Sino-Global Energy

摘　　要：大牛地气田开发已进入中后期,气藏剩余潜力预测、动用程度评价逐渐成为老区挖潜的工作核心。以大牛地气田下石盒子组为研究对象,研究不同层系地层压力、天然气分布特征,分析地层压力与天然气富集关系。结果表明,研究区下石盒子组超压主要集中在盒一段、盒三段,盒一段压力系数相对较低,最大值为1.40,超压中心集中在工区中部、北部,该区域天然气较富集;盒三段压力系数较高,工区中部发育规模较大的超压中心,压力系数最大值为1.50,西南部存在低压中心,天然气主要富集在西南部压力系数较低的地区。不同层系地层压力与天然气关系存在明显差异:盒一段天然气分布与地层压力分布关系符合超压控藏理论,地层压力越高,越有利于天然气富集;盒三段天然气分布与地层压力分布关系则相反,压力系数越低,天然气越聚集。During the middle-later development period in Daniudi Gasfield,the prediction of the remaining potential and the evaluation of the production degree of gas reservoirs have gradually become the core of tapping the potential in the old area.Formation pressure and natural gas distribution characteristics of different strata were studied,and the relationship between the formation pressure and natural gas enrichment was analyzed in Lower Shihezi Formation of Daniudi Gasfield.The results show that overpressure in Lower Shihezi Formation distributes in He1 Member and He3 Member mainly.In He1 Member,the natural gas mainly distributes in the middle and center of the research area at the overpressure center with low pressure coeffi cient(maximum value is 1.40),and the larger overpressure center developed in the middle of the research area with the maximum pressure coefficient of 1.50,low pressure center distributes at southwestern research area,and the natural gas enriches at the southwestern area with low pressure coefficient.The relationship be-tween the formation pressure and the natural gas enrichment in various strata was quite different.The relation-ship in He1 Member accords with overpressure hydrocarbon accumulation theory,that is to say,higher formation pressure is more favorable to the natural gas enrichment.The relationship in He3 Member is in the op-posite,the natural gas enriches at the area with lower pressure coefficient.

关 键 词：大牛地气田 下石盒子组 地层压力 天然气分布 

分 类 号：P618.13[天文地球—矿床学]