本文選題：儲層特征 + 顆粒白云巖　； 參考：《石油實(shí)驗(yàn)地質(zhì)》2017年05期

【摘要】：四川盆地寒武系天然氣資源量大,上寒武統(tǒng)洗象池組作為一個極具潛力的含氣層系,目前勘探程度整體較低,其儲層特征及主控因素尚不明確,有待深入研究。利用巖心、薄片及分析化驗(yàn)資料對洗象池組儲層巖石類型、儲集空間、物性及發(fā)育控制因素進(jìn)行綜合研究,認(rèn)為洗象池組儲集巖主要為顆粒白云巖,其次為細(xì)(粉)晶白云巖;儲集空間包括孔隙、溶洞和裂縫,儲層類型為裂縫—孔隙(洞)型;物性總體表現(xiàn)為"低孔低滲"的特征,局部含高孔滲層段,儲層非均質(zhì)性較強(qiáng)。從分布特征上來看,洗象池組儲層縱向疊置,橫向連續(xù)性較差,川中地區(qū)往東到GT2井開始出現(xiàn)厚層儲層,再向川東五百梯地區(qū)儲層有所減薄。盆地邊緣的習(xí)水、奉節(jié)一帶儲層成帶分布,厚度較川中地區(qū)薄。儲層發(fā)育受沉積相控制作用明顯,顆粒灘發(fā)育區(qū)內(nèi)儲層發(fā)育程度較高,此外,建設(shè)性成巖作用及構(gòu)造破裂作用也對儲層發(fā)育有積極影響。
[Abstract]:The Cambrian natural gas resource in Sichuan basin is large. As a potential gas bearing system, the Upper Cambrian Xixiangchi formation has a relatively low exploration degree at present, and its reservoir characteristics and main controlling factors are not clear, which need to be further studied.The rock types, reservoir space, physical properties and development control factors of Xianghuchi formation reservoir are studied synthetically by using core, thin slice and analytical data. It is considered that the reservoir rock of Xianghuchi formation is mainly granular dolomite, followed by fine (powder) crystalline dolomite.The reservoir space includes pores, caverns and fractures, the reservoir type is fracture-pore (cave) type, and the physical property is characterized by "low porosity and low permeability", local high porosity and permeability section, and strong reservoir heterogeneity.According to the distribution characteristics, the reservoir of Xixiangchi formation is overlapped vertically and the horizontal continuity is poor. The thick reservoir appears from east to GT2 well in central Sichuan area, and then the reservoir is thinned to 500-ladder area in east Sichuan area.At the edge of the basin, the reservoir in Fengjie area is zoned and the thickness is thinner than that in the central Sichuan area.The reservoir development is obviously controlled by sedimentary facies, and the reservoir development degree is higher in the grain beach development area. In addition, constructive diagenesis and structural rupture also have a positive effect on reservoir development.
【作者單位】： 中國石油西南油氣田公司勘探開發(fā)研究院;油氣藏地質(zhì)及開發(fā)工程國家重點(diǎn)實(shí)驗(yàn)室(成都理工大學(xué));
【基金】：國家科技重大專項(xiàng)“大型油氣田及煤層氣開發(fā)”(2011ZX05004-005)資助
【分類號】：P618.13

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