首页> 中文期刊> 《中国煤炭地质 》 >浙江页岩气等非常规天然气勘查思考

浙江页岩气等非常规天然气勘查思考

             

摘要

Geo tectonic position of the Zhejiang Province is at the southeast end of the East Asia continent, across the two large tectonic units of Yangtze landmass and Wuyi-Yunkai orogenic belt. In its Yangtze plate part has black shale with gas reservoir predominance generally developed, especially in the western Zhejiang area to the northwest of the Jiangshan-Shaoxing suture zone; there the Cambrian Hetang Formation hydrocarbon-bearing shale is widespread. In which, shale gas evaluation parameters Ro is 1.0% ~4.0%, TOC value 0.74%~5.98%, some researchers think, the value in western Zhejiang can be 8%~10% as high, sediment thickness in part of the area can be 600m, thus an optimistic region for shale gas in the province. Besides, a set of 176m -316m thick alternating sandy mudstone, shale, fine sandstone, mid-coarse sandstone developed in the Meishan Basin under the coal seam C of upper Permian Longtan Formation in Changxing, northern Zhejiang, rich in organic matter, also one of favorable shale gas optional regions. In another related report from East China Sea Zhejiang oil drilling data confirmed, coal seams have also hosted in the East China Sea Basin that is good for shale gas investigation and evaluation.%浙江省在区域大地构造位置上处于东亚大陆东南端,横跨扬子陆块区和武夷一云开造山系两大构造单元,在其杨子板块内具有储气优势层位的黑色页岩普遍发育,特别是分布于江绍拼合带西北的浙西地区,其寒武系荷塘组含烃页普遍发育,其中页岩气评价参数中的R0值为1.0%~4.0%,TOC值为0.74%~5.98%,有研究者认为在浙西地区TOC值可高达8%~10%,沉积厚度部分区域达600m,是浙江省最有利的页岩气选区.浙北长兴煤山盆地二叠系上统龙潭组C煤层下部发育的一套厚176~316m的砂质泥岩、页岩、细砂岩、中粗粒砂岩等互层岩系,富含有机质,也是页岩气的有利选区之一,另外浙江东海盆地的石油钻探资料证实,东海盆地也有煤层赋存,值得开展页岩气调查评价.

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