中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2015年
4期
26-29
,共4页
水井沱组%下寒武统%有机质%热成熟度%鄂西地区
水井沱組%下寒武統%有機質%熱成熟度%鄂西地區
수정타조%하한무통%유궤질%열성숙도%악서지구
Shuijingtuo Formation%Lower Cambrian Series%organic matter%thermal maturity%western Hubei area
鄂西地区地处扬子板块中部，褶曲较发育。区内下寒武统水井沱组页岩厚度达200 m左右，埋深普遍在2000～3000 m，沉积环境属外（浅水）陆棚-盆地边缘相。该页岩地层是区内主力烃源岩，TOC含量平均在3.82%，Ro平均值为2.66%，有机质类型主要是腐泥型（Ⅰ型），页岩主要参数与美国主要页岩气田参数主力近似。综合分析认为该区具备页岩气成藏的地质条件。
鄂西地區地處颺子闆塊中部，褶麯較髮育。區內下寒武統水井沱組頁巖厚度達200 m左右，埋深普遍在2000～3000 m，沉積環境屬外（淺水）陸棚-盆地邊緣相。該頁巖地層是區內主力烴源巖，TOC含量平均在3.82%，Ro平均值為2.66%，有機質類型主要是腐泥型（Ⅰ型），頁巖主要參數與美國主要頁巖氣田參數主力近似。綜閤分析認為該區具備頁巖氣成藏的地質條件。
악서지구지처양자판괴중부，습곡교발육。구내하한무통수정타조혈암후도체200 m좌우，매심보편재2000～3000 m，침적배경속외（천수）륙붕-분지변연상。해혈암지층시구내주력경원암，TOC함량평균재3.82%，Ro평균치위2.66%，유궤질류형주요시부니형（Ⅰ형），혈암주요삼수여미국주요혈암기전삼수주력근사。종합분석인위해구구비혈암기성장적지질조건。
The western Hubei area is situated on the middle part of Yangtze plate with developed folds. Lower Cambrian Shuijingtuo Formation shale thickness can be about 200m, buried depth generally between 2 000~3 000m. Depositional environment belongs to out?er (shallow water) continental shelf-basin border facies. The shale is the main source rock in the area. Average TOC content is 3.82%, mean Ro 2.66%, organic matter mainly sapropel type (type I), main shale parameters are similar to those in US main shale gas fields. Comprehensive analysis considered that the area has geological conditions beneficial to shale gas reservoiring.
