發(fā)布時間：2018-03-20 03:28

  本文選題：煤系頁巖氣　切入點(diǎn)：儲集空間　出處：《吉林大學(xué)學(xué)報(地球科學(xué)版)》2017年02期 　論文類型：期刊論文

【摘要】：海陸過渡相煤系泥頁巖廣泛分布,具有良好的天然氣資源潛力。以淮南煤田煤系泥頁巖為研究對象,運(yùn)用X射線衍射、掃描電鏡等分析手段,對淮南煤田煤系地層泥頁巖的礦物學(xué)、巖相、儲層特征等方面進(jìn)行相關(guān)測試,并探討了泥巖巖相對頁巖氣儲集空間的控制作用。研究表明:淮南煤田煤系泥頁巖礦物成分中黏土礦物含量多、自生非黏土礦物相對較少,致使巖石脆性降低并對壓裂裂縫產(chǎn)生具有負(fù)效應(yīng),但部分菱鐵礦的存在可能起改善作用;存在花斑狀高嶺石泥巖、淺灰色高嶺石泥巖、鮞狀泥巖、暗色泥巖、粉砂質(zhì)泥巖等5種巖相。泥頁巖儲層裂縫包括層面剪切縫、有機(jī)質(zhì)演化異常壓力縫、層間頁理縫、構(gòu)造裂縫等宏觀類型和與石英和高嶺石有關(guān)的微裂縫類型;泥頁巖孔隙包括化石孔、粒間孔、粒內(nèi)孔和晶間孔及可能的有機(jī)質(zhì)孔等類型,為頁巖氣賦存提供了儲集空間。不同沉積環(huán)境下的泥巖巖相不同,進(jìn)而決定了礦物成分特征與有機(jī)質(zhì)相對含量,對泥頁巖儲集空間起主要控制作用。
[Abstract]:Paralic coal shale is widely distributed and has good potential of natural gas resources in Huainan coalfield. Coal shale as the research object, using X ray diffraction, scanning electron microscopy, the mineralogy of Huainan coalfield, coal bearing strata of shale facies, reservoir characteristics and other aspects of the relevant test, and discusses the control effect the mudstone relative shale gas reservoir space. Results showed that the content of clay minerals in Huainan coalfield coal shale minerals, authigenic non clay minerals is relatively small, resulting in reduced rock brittleness and produce negative effects on fracture, but some siderite existence may improve; existing granophyric kaolinite mudstone, shallow the grey oolitic kaolinite mudstone, mudstone, mudstone, silty mudstone and other 5 kinds of lithofacies. Shale reservoir fracture level including shear fracture, organic evolution of abnormal pressure joints between layers Foliation joints, structural fractures and other macro types and associated with quartz and kaolinite micro fracture type shale pore; including fossil pore, intergranular pore, hole and other types of possible organic pore intragranular pore and intergranular, provides reservoir space for shale gas accumulation. Under different sedimentary environments of different mudstone facies. And then determine the relative content of mineral composition and characteristics of organic matter, the space has played an important role in shale reservoir.

【作者單位】： 安徽理工大學(xué)地球與環(huán)境學(xué)院;安徽省煤田地質(zhì)局;
【基金】：國家自然科學(xué)基金項目(41402140,41302129) 安徽省頁巖氣資源調(diào)查評價項目(2012-g-17) 安徽省自然科學(xué)基金項目(1408085QE88)~~
【分類號】：P618.13

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本文編號：1637323