黔东南地区岑巩页岩气区块勘探潜力  

Exploration potential of shale gas in Cen'gong block,southeastern Guizhou province

作　　者：聂永生[1] 冷济高 韩建辉[3] 孙利[1] 沈贵春 

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059 [2]中国国储能源化工集团股份公司,北京100107 [3]成都理工大学能源学院,四川成都610059 [4]青海省环境地质勘查局,青海西宁810007

出　　处：《石油与天然气地质》2013年第2期274-280,共7页Oil & Gas Geology

摘　　要：上扬子地台页岩气资源丰富,特别是下寒武统牛蹄塘组勘探潜力巨大。岑巩页岩气区块位于上扬子地台牛蹄塘组主要页岩气富集区,其页岩气勘探潜力亟待深入和准确评价。运用地层对比、储层分析和烃源岩地球化学分析等手段,结合前人研究成果,对岑巩页岩气区块的构造、储层和烃源岩特征进行了系统研究。通过上述研究,厘定了研究区牛蹄塘组地层的分布范围、储层物性、烃源岩厚度等参数及其分布特征,结合岑页1井含气量测试结果,进一步计算了该区块的资源量。结果表明,岑巩页岩气区块牛蹄塘组有机质类型主要为Ⅰ型和Ⅱ1型;烃源岩有机质含量高,平均为3.38%;计算镜质体反射率平均为3.56%,达到成熟晚期阶段;储层具有低孔-超低渗、高比表面积特征;区块的可采资源量达71.94×108m3。由此可认为,岑巩页岩气区块具备了较好的烃源岩、储层、埋藏条件,可采资源量大,可以选择该区块的民和、羊桥和大坪等有利地区进行下一步的勘探和评价工作。The shale gas resources are rich in the Upper Yangtze platform,especially the Lower Cambrian Niutitang Formation.Cen＇gong shale gas block is located within the Niutitang shale gas play on the Upper Yangtze platform.This paper systematically studied the structure,source rocks and reservoirs characteristics of the Niutitang Formation in Cen＇gong block through stratigraphic correlation,laboratory test of reservoir rock sample and geochemical analysis of source rock samples and in combination with previous study results.The distribution of Niutitang Formation,reservoir physical property and thickness of source rocks were mapped.Further more,the resource volume of shale gas was calculated by using the gas content data obtained from testing in well Cenye 1 that the following results were obtained.The organic matters of the Niutitang Formation are mainly of typeⅠand typeⅡ1.The average organic matter content of the source rock is as high as 3.38%.The average Ro is calculated to be 3.56%,which reflects the source rock has entered high maturation stage.The reservoirs are characterized by low porosity-ultralow permeability and large specific surface area.The recoverable resource volume of shale gas is estimated at 7.19 billion cubic meters.The Minhe,Yangqiao and Daping areas of the Cen＇gong block can be selected as favorable shale gas play fairways for further exploration and evaluation.

关 键 词：地质特征 页岩气 牛蹄塘组 岑巩区块 黔东地区 上扬子地台 

分 类 号：TE121.1[石油与天然气工程—油气勘探]