新场须四下亚段沉积相精细描述  

Description of the new field should be looked fine submember sedimentary facies

作　　者：李佳阳[1] 黎华继[2] 李建良[3] 周维娜[2] 李忠平[1] 

机构地区：[1]中国石化西南油气分公司开发处,四川成都610016 [2]中国石化西南油气分公司勘探开发研究院,四川成都610016 [3]中国石化西南油气分公司,四川成都610016

出　　处：《大众科技》2015年第5期35-38,共4页Popular Science & Technology

摘　　要：根据高分辨层序地层学和沉积特征,新场须四下亚段可划分为TX48、TX49、TX410三套砂组。主要为辫状河三角洲相的粗碎屑沉积,其中砾岩、砂砾岩属超致密储层,砂岩主要为致密储层,天然气产出须裂缝沟通,砂岩为储集空间的主要提供者但不发育裂缝,而砾岩发育。因此,用分流河道和水下分流河道微相难以描述有利储集体,需细化微相。根据沉积构造、岩性组合、电性等识别标志,将其分为砾质、砂砾质以及砂质(水下)分流河道微相、河口坝、远砂坝沉积微相。通过地球物理技术的精细刻画,揭示研究区北部、中部储层沉积微相以三角洲平原砾质、砂砾质以及砂质分流河道为主,而往南以三角洲前缘亚相的河口坝、远砂坝沉积微相为主,细化了储层的空间展布规律,可为后续的储层储集性能的研究及储层评价提供有力支撑。According to high resolution sequence stratigraphy and sedimentary features, the new field should be looked subsegment can be divided into TX48, TX49, TX410 three sand group. Mainly coarse clastic braided river delta deposit, which the conglomerate, conglomerate belongs to super tight reservoir sandstone reservoirs mainly dense, crack gas production shall communicate the main provider of sandstone reservoir space but not fracture development, and development conglomerate. Therefore, underwater distributary channel and distributary channel microfacies indescribable favorable reservoir, to be refined micro phase. According sedimentary structures, lithologic, electricity and other identification, will be divided into gravelly, sandy and gravelly and sandy（underwater） distributary channel microfacies, mouth bar, distal bar sedimentary microfacies. Fine characterization by geophysical techniques, revealed the study area in northern and central reservoir sedimentary facies delta plain gravelly, sandy and gravelly and sandy main distributary channel, mouth bar and south to delta front, much sand dam sedimentary micro facies, refine the spatial distribution law of reservoir, can provide strong support for follow-up studies and reservoir evaluation of reservoir properties of reservoir.

关 键 词：新场 须家河组 沉积相 致密储层 裂缝 

分 类 号：TE1[石油与天然气工程—油气勘探]