鄂尔多斯地区东北部大牛地气田-天然气与石油.DOC

松辽盆地梨树断陷金山气田沙河子组沉积相研究 张广权 吕林 孙兵 贾跃玮 郭艳东 冯琼 （中国石化勘探开发研究院，北京，100083） 摘要 针对金山气田储层岩性和沉积环境复杂多样等难点，在区域沉积背景指导下，通过开展地质录井、测井的观察、描述、解释与对比研究，依据主要含气层位沙河子组的岩石组合、沉积构造、剖面结构和测井相组合特征，综合研究认为金山气田沙河子组沉积期陡坡带发育水下扇沉积体系、缓坡带发育扇三角洲沉积体系。其中砾石坝、辫状水道为最有利的储集相带。纵向上，沙河子组沉积期由沙三四段→沙二段→沙一段，扇三角洲的主河道越来越发育，而且河道呈由东向西摆动。综合地质研究成果建立了金山气田沙河子组的沉积模式图。 关键词 梨树断陷 金山气田 沙河子组 扇三角洲沉积 辫状河道 The Research for Sedimentary Facies in Shahezi Formation of Jinshan gasfield,Lishu Fault Depression in Songliao Basin Zhang Guangquan,Lv Lin,Sun Bing Jia Yuewei, Guo Yandong, Feng Qiong (Research Institute of Petroleum Explorastion Production,SINOPEC, Beijing 100083,China) Abstract: Reservoir lithology and sedimentary environment of Jinshan Gasfield are very complex. For the above difficulties,application of geological setting, through drilled wells’ geologic logging data,observation,based on rock composition, deposition construction, profile and log-phase combination of structural characteristics,this article determinies sedimentary facies of Shahezi Formation.In steep slope zone,this gasfield develops underwater fan sedimentary system.In gentle slope zone, this gasfield develops Fan delta sedimentary system.The gravel bars and braided stream are favorable reservoir facies.During the depositional stage of Shahezi formation,channel sand is more and more development.The channels are swing strongly from early to late stage of Shahezi formation.Through the comprehensive research, a sedimentary mode of Shahezi formation is created. Keywords: Lishu fault depression Jinshan gasfield Shahezi Formation fan delta braided channel 金山气田位于吉林省公主岭市境内的榆树台镇，地处松辽平原，地势平坦，平均海拔在160m，交通便利，距公主岭市40km、长春市96km。2010年实施的梨6井是金山构造的第一口探井，位于研究区的缓坡带，测试显示沙河子组获得工业气流，常规测试日产气最高达18754m3。金1位于研究区陡坡带，压裂日产气达21142m3。其他新完钻井在沙河子组也见良好的气显示，表明金山气田具有较好的开发前景。但是研究区岩性、沉积环境复杂、发育多套沉积体系，储层预测难度大。本文以沙河子组作为主要研究目的层开展沉积特征研究。 1、区域地质背景 图1梨树断陷金山气田构造位置 Fig.1 Location map of the Jinshan gasfield, Lishu Fault Depression 图2金山气综合柱状图 Fig2 Stratigraphic column of Jinshan gasfield 金山气