鄂西松滋地区牛蹄塘组页岩气储层特征及选区评价  

Reservoir Characteristics and Constituency Evaluation of Niutitang Formation Shale Gas in Songzi Area,Western Hubei Province

作　　者：杨洁 吴龙 赵雪松 余江浩 徐聪 YANG Jie;WU Long;ZHAO Xuesong;YU Jianghao;XU Cong(Hubei Geological Survey)

机构地区：[1]湖北省地质调查院

出　　处：《现代矿业》2023年第9期63-66,共4页Modern Mining

摘　　要：为研究松滋地区牛蹄塘组页岩气成藏条件,从岩石组合特征、有机地化特征、储层特征、含气性等方面对研究区牛蹄塘组页岩进行了分析。结果表明,研究区松地2井富有机质泥页岩位于牛蹄塘组一段,岩性为灰黑色含碳钙质泥岩,厚度124.3 m;干酪根以腐泥型为主,TOC值为0.5%~10%,平均值为1.6%;牛蹄塘组普遍发育裂缝,以高角度斜交裂缝最为发育,近垂直裂缝次之,少见顺层裂缝;松地1井牛蹄塘组现场解析含气量为0~0.2 m^(3)/t,平均含气量为0.1 m^(3)/t;松地2井牛蹄塘组现场解析含气量为0~0.7 m^(3)/t,平均含气量为0.3 m^(3)/t。通过综合上述分析结果,与鄂西地区牛蹄塘组各类参数进行类比,在松滋刘家场地区共优选出1个三类有利区。In order to study the shale gas accumulation conditions of Niutitang Formation in Songzi ar⁃ea,the shale of Niutitang Formation in the study area is analyzed from the aspects of rock association,organ⁃ic geochemistry,reservoir characteristics and gas bearing properties.The results show that the organic-rich mud shale of No.2 Songdi well in the study area is located in the first member of Niutitang Formation.The li⁃thology is gray-black carbonaceous calcareous mudstone with a thickness of 124.3 m.Kerogen is dominated by sapropelic type,and TOC values range from 0.5%~10%,with an average value of 1.6%.Fractures are gen⁃erally developed in Niutitang Formation,with high-angle oblique fractures being the most developed,fol⁃lowed by near-vertical fractures,and rare along bedding fractures.The field analytical gas content of niuti⁃tang formation in No.1 Songdi well is 0~0.2 m^(3)/t,the average gas content is 0.1 m^(3)/t,and the field analytical gas content of niutitang formation in No.2 Songdi well is 0~0.7 m^(3)/t,the average gas content is 0.3 m^(3)/t.By comparing the above analysis results with the parameters of Niuitang Formation in western Hubei,a three-class favorable area is selected in Liujiachang area of Songzi.

关 键 词：页岩气 牛蹄塘组 选区评价 松滋地区 

分 类 号：P618.13[天文地球—矿床学]