天然气工业2018，Vol.38Issue(2)：33-42,10.DOI:10.3787/j.issn.1000-0976.2018.02.005
四川盆地西部龙门山地区中二叠统碳酸盐岩储层特征及勘探方向
Characteristics and exploration direction of the Middle Permian carbonate reservoirs in the Longmenshan mountain areas, western Sichuan Basin
摘要
Abstract
In recent years,high-yield industrial gas flows have been obtained from the Permian Qixia-Maokou strata successively in Wells ST1 and LT1 in the Longmenshan mountain areas in the western Sichuan Basin,and a good gas exploration prospect is presented.To further understand the reservoir property of natural gas accumulation strata in this area,we analyzed the reservoir characteristics of Qixia and Maokou Fms in this area and their main control factors macroscopically and microscopically based on abundant surface outcrops and drilling data.Then,combined with the characteristics of developed gas reservoirs,favorable natural gas exploration zones were evaluated comprehensively.And the following research results were obtained.First,the microfacies of platform marginal banks are developed in the front areas of northern section and southern sections of Longmenshan during the sedimentation of Middle Permian strata,so it is favorable for the development of scale reservoirs.Second,the Middle Permian reservoirs are mainly of fractured-vuggy-porous type and porous-fractured-vuggy type.The former is often occurred in the Qixia Fm while latter is mostly in the Maokou Fm.Third,scale development of Middle Permian reservoirs is mainly dominated by sedimentary microfacies,dolomitization,dissolution and structure fracturing.Among them,sedimentary microfacies are the foundation of scale reservoir development,dolomitization and dissolution improves the seepage capacity of reservoirs and structure fracturing promotes the scale reworking of dissolution.It is concluded that the ZhongbaShuanyushi platform marginal bank area in the northern section of Longmenshan will be the most favorable gas exploration zone,the Lianhuashan-Pingluoba platform marginal bank area in the southern section of Longmenshan will be the secondary,and the JiulongshanLaoguanmiao and Dayi-Daxingchang intra-platform banks will be the favorable zones for the exploration of large karst fractured-vuggy gas reservoirs.关键词
四川盆地西部/龙门山/中二叠世/缝洞-孔隙型/孔隙-缝洞型/储集层特征/控制因素/勘探区Key words
Sichuan Basin/West/Longmenshan/Middle Permian/Fractured-vuggy-porous type/Porous-fractured-vuggy type/Reservoir characteristic/Control factor/Exploration area引用本文复制引用
张本健,谢继容,尹宏,胡欣,王宇峰,杨迅,裴森奇..四川盆地西部龙门山地区中二叠统碳酸盐岩储层特征及勘探方向[J].天然气工业,2018,38(2):33-42,10.基金项目
中国石油西南油气田公司科技重大专项“川西地区天然气勘探开发关键技术研究”(编号:2013ZD01). （编号:2013ZD01）
