本文選題：鈣屑砂礫巖儲(chǔ)層 + 儲(chǔ)層特征��； 參考：《石油與天然氣地質(zhì)》2016年04期

【摘要】：四川盆地元壩地區(qū)須家河組三段多口井測(cè)試獲得中-高產(chǎn)工業(yè)氣流,具有良好勘探開(kāi)發(fā)潛力,但其儲(chǔ)層特征及控制因素不明確。利用巖心、薄片及分析化驗(yàn)資料對(duì)研究區(qū)儲(chǔ)層巖石類型、儲(chǔ)集空間、物性及發(fā)育控制因素進(jìn)行綜合研究。研究認(rèn)為:儲(chǔ)層巖石類型以鈣屑砂巖和灰質(zhì)礫巖為主,具有"石英、長(zhǎng)石含量低,碳酸鹽巖屑(碳酸鹽礫)含量高"的特征。儲(chǔ)集空間以粒間溶孔、粒內(nèi)溶孔及裂縫為主,鈣屑砂巖與灰質(zhì)礫巖儲(chǔ)層差異明顯。鈣屑砂巖為裂縫-孔隙型儲(chǔ)層,而灰質(zhì)礫巖為孔隙-裂縫型儲(chǔ)層,物性總體較差,具有低孔、低滲的特征。儲(chǔ)層發(fā)育主要受沉積微相、巖石類型、溶蝕作用及裂縫共同控制。有利沉積微相及巖石類型是優(yōu)質(zhì)儲(chǔ)層發(fā)育的基礎(chǔ),溶蝕作用及裂縫是優(yōu)質(zhì)儲(chǔ)層發(fā)育的關(guān)鍵。水下分流主河道中-粗粒鈣屑砂巖為最有利巖相,高含量鈣屑組分在后期溶蝕作用及裂縫改造下易形成優(yōu)質(zhì)儲(chǔ)層。
[Abstract]:The multi-well test of the third member of Xujiahe formation in Yuanba area of Sichuan Basin obtained medium and high yield industrial airflow which has good exploration and development potential but its reservoir characteristics and controlling factors are not clear. The rock types, reservoir space, physical properties and development control factors of reservoir in the study area were studied by using core, thin slice and analytical data. It is considered that the reservoir rock types are mainly calcareous sandstone and lime-conglomerate with the characteristics of "quartz, low feldspar content and high carbonate lithic (carbonate gravel) content". The reservoir space is mainly composed of intergranular dissolved pore, intragranular dissolved pore and fracture, and the difference between calcareous sandstone and grain-conglomerate reservoir is obvious. The calcareous sandstone is a fissure-pore type reservoir while the lime-conglomerate is a pore-fracture type reservoir with poor physical properties and low porosity and permeability. Reservoir development is mainly controlled by sedimentary microfacies, rock types, dissolution and fractures. Favorable sedimentary microfacies and rock types are the basis for the development of high quality reservoirs. Dissolution and fracture are the key to the development of high quality reservoirs. Medium-coarse grained calcareous sandstone is the most favorable lithofacies in the main channel of underwater distributary.
【作者單位】： 中國(guó)石化勘探分公司;
【基金】：國(guó)家科技重大專項(xiàng)(2016ZX05002-004)
【分類號(hào)】：P618.13

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