本文選題：微生物礁 + 凝塊石　； 參考：《石油勘探與開發(fā)》2017年03期

【摘要】：基于5條野外露頭剖面、162塊薄片、12塊掃描電鏡(SEM)樣品及52套孔滲物性數(shù)據(jù)等資料,分析塔里木盆地阿克蘇地區(qū)下寒武統(tǒng)肖爾布拉克組臺緣微生物礁的結(jié)構(gòu)特點及儲集層主控因素。臺緣由小型微生物礁群組成,單一礁體可分為前礁相、礁前相、礁脊相、礁后相,鏡下可見礁巖具有不同的顯微結(jié)構(gòu)。微生物礁發(fā)育微生物結(jié)構(gòu)儲集空間和非生物結(jié)構(gòu)儲集空間,前者包括窗格孔、格架孔、鑄�？准俺笕芸�,后者包括微裂縫和縫合線�？诐B數(shù)據(jù)統(tǒng)計結(jié)果表明:于提希剖面微生物礁孔隙度基本小于5%,滲透率一般小于1.0×10~(-3) μm~2,主要為特低孔特低滲儲集層,而蘇蓋特布拉克剖面孔隙度多為3%~10%,滲透率為(0.1~50.0)×10~(-3) μm~2,整體跨度較大,且礁內(nèi)物性非均質(zhì)性較強(qiáng),主要為低—中孔、低—中滲儲集層。說明不同微生物礁的物性特征具有較大的差異,同一微生物礁內(nèi)亦具有明顯的儲集非均質(zhì)性。古地貌特征控制微生物礁的發(fā)育,沉積作用控制相帶的展布及原生孔隙的發(fā)育,而溶蝕作用受控于古地貌特征和沉積作用,最終決定微生物礁儲集層孔隙的演化。
[Abstract]:Based on the data of 162 thin sheets and 12 SEM SEM samples from 5 outcrops in the field, and 52 sets of pore and osmotic properties data, etc. The structural characteristics and reservoir control factors of microbe reefs in the platform margin of the Lower Cambrian Sholburak formation in Aksu area of Tarim Basin are analyzed. The single reef body can be divided into the front reef facies, the reef front facies, the reef ridge facies, the reef rear facies. The reef rock has different microstructure under the mirror. Microbial reef developed microbial structure storage space and abiotic structure storage space, the former includes pane hole, lattice hole, mold hole and super solution pore, and the latter includes micro-crack and suture line. The statistical results of pore and permeability data show that the porosity of microbe reef is less than 5 and the permeability is generally less than 1.0 脳 10 ~ (-3) 渭 m ~ (-2) in Yushi profile, which is mainly very low porosity and low permeability reservoir. The porosity of Sugait-Blak section is 3 ~ 1010, permeability is 0.1 ~ 50.0 脳 10 ~ (-3) 渭 m ~ (-2), the whole span is large, and the heterogeneity of physical properties in the reef is strong, mainly low to medium porosity and low to medium permeability reservoir. The results show that the physical properties of different microbial reefs are different, and the reservoir heterogeneity is also obvious in the same microbial reef. Paleogeomorphic features control the development of microbial reefs, sedimentary processes control the distribution of facies belts and the development of primary pores, while dissolution is controlled by paleogeomorphic characteristics and sedimentary processes, which ultimately determines the evolution of pores in microbial reefs.
【作者單位】： 中國石油勘探開發(fā)研究院;北京大學(xué)地球與空間科學(xué)學(xué)院;中國石化石油勘探開發(fā)研究院;
【基金】：國家油氣重大專項(2016ZX05004-001) 中國石油天然氣股份有限公司勘探開發(fā)研究院院級超前基礎(chǔ)研究項目(2015yj-09)
【分類號】：P618.13

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