【摘要】：修武盆地位于中下?lián)P子交界處,前期研究表明該盆地富有機質(zhì)頁巖層段較為發(fā)育,頁巖氣資源估計潛力巨大。但是以往針對修武盆地開展的工作主要限于區(qū)域地質(zhì)調(diào)查或者金屬及水泥等資源研究,尚未開展過系統(tǒng)的油氣地質(zhì)及頁巖氣成藏方面的研究工作。為此,本博士論文站在學(xué)科發(fā)展前緣,緊抓國際、國內(nèi)研究熱點問題,以現(xiàn)代沉積地質(zhì)學(xué)、儲層地質(zhì)學(xué)和石油地質(zhì)學(xué)等多學(xué)科理論為指導(dǎo),通過野外剖面觀測、鉆井巖心觀察、室內(nèi)測試分析和系統(tǒng)綜合研究,對江西修武盆地寒武系-志留系黑色頁巖儲層特征及成藏條件進(jìn)行了深入、系統(tǒng)、綜合研究,并取得了一定的成果和進(jìn)展。修武盆地寒武系—志留系黑色頁巖巖石學(xué)特征表現(xiàn)為:寒武系王音鋪組—觀音堂組的主要巖性為灰黑色炭質(zhì)頁巖、硅質(zhì)頁巖局部夾有泥灰?guī)r、石煤層和磷鐵礦結(jié)核。奧陶系新開嶺組-志留系梨樹窩組的主要巖性包括黑色炭質(zhì)頁巖、硅質(zhì)頁巖和粉砂質(zhì)頁巖。黑色頁巖發(fā)育的沉積環(huán)境,主要為陸棚環(huán)境。并按照水體深淺及巖性組合劃分了兩個沉積亞相:淺水陸棚亞相和深水陸棚亞相。深入、系統(tǒng)研究了黑色頁巖儲層特征。結(jié)果表明黑色頁巖段脆性礦物高含量,主要脆性礦物包括石英、長石、黃鐵礦等。主要發(fā)育粒內(nèi)孔、粒間孔、有機質(zhì)孔等孔隙類型�？紫洞笮≈饕�0.5um-10um之間。物性統(tǒng)計結(jié)果顯示,孔隙度主要分布在2-4%(泥頁巖)及10-15%(含砂質(zhì))兩個區(qū)間,平均5.16%;滲透率主要分布于(0.001-0.01)×10-3μm2,平均0.07×10-3μm2,裂縫發(fā)育區(qū),具有高值滲透率,孔滲相關(guān)性較差。將修武盆地寒武系-志留系黑色頁巖與國內(nèi)外典型頁巖層段進(jìn)行了對比研究。相似性表現(xiàn)為沉積環(huán)境的相似性、巖性的相似性、脆性礦物含量的相似性、頁巖/泥頁巖有機質(zhì)豐度的相似性幾個方面;差異性表現(xiàn)為埋藏深度的差異性、頁巖有機質(zhì)成熟度的差異性、頁巖厚度的差異性、總資源量的差異性幾個方面。這對于深刻認(rèn)識研究區(qū)頁巖氣成藏特征具有重要的指導(dǎo)意義。進(jìn)而通過構(gòu)造-沉積條件、氣源條件、儲集條件、運聚條件、溫壓條件、保存條件等成藏條件研究,首次建立了頁巖氣“廣覆式生排烴、裂縫/微裂隙導(dǎo)通、大面積聚集”的自生自儲型成藏模式。在對國內(nèi)外頁巖氣地質(zhì)特征差異性對比分析基礎(chǔ)上,指明了修武盆地頁巖氣成藏的主控因素,并建立了研究區(qū)頁巖氣評價參數(shù)指標(biāo);根據(jù)頁巖氣評價標(biāo)準(zhǔn)對修武盆地3個目標(biāo)組進(jìn)行了整體評價,并在有利區(qū)優(yōu)選基礎(chǔ)上對修武盆地頁巖氣的資源量進(jìn)行了估算,估算結(jié)果為1014.66×108m3。
[Abstract]:Xiuwu basin is located at the junction of middle and lower Yangtze. Previous studies show that the shale formation with rich organic matter is relatively developed and the estimation potential of shale gas resources is great. However, the previous work on Xiuwu Basin is mainly limited to regional geological survey or research on resources such as metal and cement, but no systematic research work has been carried out on oil and gas geology and shale gas accumulation. Therefore, this doctoral thesis stands on the front edge of the discipline development, clings to the international and domestic research hot issues, and takes the modern sedimentary geology, reservoir geology and petroleum geology as the guidance, through the field profile observation, drilling core observation, etc. In this paper, the characteristics and reservoir forming conditions of Cambrian-Silurian black shale reservoirs in Xiuwu Basin, Jiangxi Province are studied thoroughly, systematically and comprehensively, and some achievements and progress have been made. The petrological characteristics of Cambrian-Silurian black shale in Xiuwu Basin are as follows: the main lithology of Cambrian Wangyinpu formation-Guanyintang formation is gray-black carbonaceous shale, siliceous shale is partially intercalated with marl, stone seam and phosphorite nodules. The lithology of Ordovician Xinkailing formation and Silurian Lishuwo formation includes black carbonaceous shale, siliceous shale and silty shale. The sedimentary environment of black shale is mainly shelf environment. According to the combination of water depth and lithology, two sedimentary subfacies were divided: shallow water shelf subfacies and deep water shelf subfacies. In depth, the characteristics of black shale reservoir are systematically studied. The results show that the brittleness minerals in the black shale are high, and the main brittle minerals include quartz, feldspar, pyrite and so on. The main pore types are intragranular pore, intergranular pore, organic pore and so on. The pore size is mainly between 0.5um-10um. The results of physical property statistics show that porosity is mainly distributed in 2 ~ 4% (shale) and 10 ~ (-15%) (sandy), with an average of 5.16, and permeability is mainly distributed in (0.001-0.01) 脳 10 ~ (-3) 渭 m ~ (2), with an average of 0.07 脳 10 ~ (-3) 渭 m ~ (2). The Cambrian-Silurian black shale in Xiuwu Basin is compared with typical shale formations at home and abroad. The similarity shows the similarity of sedimentary environment, lithology, brittle mineral content, organic matter abundance of shale / shale, the difference of burial depth, the similarity of lithology, the similarity of brittle mineral content and the similarity of organic matter abundance of shale / shale. The maturity of shale organic matter, shale thickness and total resources are different. It is of great significance to understand the characteristics of shale gas accumulation in the study area. Furthermore, through the study of reservoir forming conditions such as tectonic-sedimentary conditions, gas source conditions, reservoir conditions, migration and accumulation conditions, temperature and pressure conditions, and preservation conditions, it is the first time to establish shale gas "extensive hydrocarbon generation and expulsion, fracture / microfracture conduction". The model of self-generation, self-storage and accumulation of large-area agglomeration. Based on the comparative analysis of the geological characteristics of shale gas at home and abroad, the main controlling factors of shale gas accumulation in Xiuwu Basin are pointed out, and the evaluation parameters of shale gas in the study area are established. According to the evaluation criteria of shale gas, the three target groups in Xiuwu Basin were evaluated as a whole, and the amount of shale gas resources in Xiuwu Basin was estimated on the basis of optimal selection of favorable areas. The estimated result was 1014.66 脳 10 ~ 8m ~ 3.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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相關(guān)期刊論文 前1條

1 李建青;高玉巧;花彩霞;夏在連;;北美頁巖氣勘探經(jīng)驗對建立中國南方海相頁巖氣選區(qū)評價體系的啟示[J];油氣地質(zhì)與采收率;2014年04期

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本文編號：2220311