湘西北地区花垣页岩气区块勘探潜力  

Exploration Potential of Shale Gas in Huayuan Block,Northwest Hunan Province

作　　者：冷济高 韩建辉[4] 李飞 李鹏 孟兰 

机构地区：[1]中国国储能源化工集团股份公司,北京100107 [2]铜仁中能天然气有限公司,贵州铜仁554300 [3]国能新瑞页岩气工程技术有限公司,北京100107 [4]成都理工大学能源学院,四川成都610059

出　　处：《天然气地球科学》2014年第4期624-631,共8页Natural Gas Geoscience

摘　　要：上扬子地台页岩气资源丰富,特别是牛蹄塘组勘探潜力巨大。花垣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发掘和准确评价。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,对花垣页岩气区块的构造、储层和烃源岩特征进行了系统研究。厘定了牛蹄塘组的分布范围、储层物性、烃源岩厚度等参数及其分布特征,结合渝科1井和岑页1井的含气量测试结果,进一步计算了区块资源量。花垣页岩气区块牛蹄塘组的有机质类型主要为Ⅰ型和Ⅱ1型;烃源岩有机质含量高,其平均值为3.52%;镜质体反射率平均值为3.58%,达到成熟晚期阶段;储层具有低孔—超低渗、高比表面积的特征;区块的可采资源量达31.87×108 m3。花垣页岩气区块具备了较好的烃源岩、储层及埋藏条件,可采资源量大,可以优选区块中上部的民乐至龙寨一线进行下一步的勘探和评价工作。The shale gas resources are rich in Upper Yangtze platform,especially in the Niutitang Formation.Huayuan shale gas block is located within the shale gas abundant play of Niutitang Formation in Upper Yangtze platform.Based on the stratigraphic correlation,reservoir analysis and geochemical analysis of source rock samples and in combination with previous study results,the structure,source rock and reservoirs characteristics of the Niutitang Formation in Huayuan block was systematically studied.The distribution range of the Niutitang Formation,reservoir physical property and thickness of source rocks were mapped.Furthermore,the resource volume of shale gas was calculated by using the gas content data obtained from testing in well Yuke 1and well Cenye 1.The kerogen types of the Niutitang Formation in the Huayuan shale gas block wereⅠandⅡ1.With average values of TOCand ROof 3.52%and 3.58%,respectively,reflecting the source rock has entered intoover-maturity stage.The reservoirs characteristics are low porosity-ultralow permeability and high specific surface area.The recoverable resource volume of shale gas is estimated up to 3.18billion cubic meters.The area from Minle to Longzhai,in the middle-upper of the Huayuan block can be selected for the further exploration and evaluation.

关 键 词：地质特征 页岩气 牛蹄塘组 花垣区块 湘西北地区 上扬子地台 

分 类 号：TE132.2[石油与天然气工程—油气勘探]