本文關(guān)鍵詞：四川盆地威遠(yuǎn)地區(qū)龍馬溪組泥頁(yè)巖儲(chǔ)層非均質(zhì)性　出處：《斷塊油氣田》2016年04期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 泥頁(yè)巖儲(chǔ)層 非均質(zhì)性 四川盆地 龍馬溪組

【摘要】：在詳細(xì)調(diào)研前人研究成果的基礎(chǔ)上,結(jié)合四川盆地威遠(yuǎn)地區(qū)的實(shí)際地質(zhì)情況,將泥頁(yè)巖儲(chǔ)層的非均質(zhì)性分為宏觀非均質(zhì)性、微觀非均質(zhì)性和巖石力學(xué)非均質(zhì)性3個(gè)方面。泥頁(yè)巖儲(chǔ)層的宏觀非均質(zhì)性主要體現(xiàn)在儲(chǔ)層的橫向展布、垂向上的巖性變化以及裂縫的分布特征。下志留統(tǒng)龍馬溪組海相優(yōu)質(zhì)頁(yè)巖的有效厚度普遍大于30 m,橫向上厚度變化較小,均質(zhì)性相對(duì)較好;垂向上泥頁(yè)巖中普遍含砂質(zhì)和灰質(zhì),部分層段幾乎為粉砂巖,垂向非均質(zhì)性非常明顯;儲(chǔ)層中裂縫主要發(fā)育在龍馬溪組底部層段,具有極強(qiáng)的非均質(zhì)性。微觀非均質(zhì)性主要受礦物組分和成巖作用的控制,其礦物組分、微孔隙和微裂縫的發(fā)育特征具有非常明顯的非均質(zhì)性。巖石力學(xué)非均質(zhì)性主要包括泊松比、彈性模量、脆性和應(yīng)力各向異性,是決定后期水力壓裂措施和頁(yè)巖氣產(chǎn)量的關(guān)鍵。綜合研究認(rèn)為,四川盆地及其周緣龍馬溪組頁(yè)巖橫向均質(zhì)性較好,垂向非均質(zhì)性、儲(chǔ)層裂縫發(fā)育特征、微觀非均質(zhì)性以及巖石力學(xué)非均質(zhì)性明顯,對(duì)后期頁(yè)巖氣井的壓裂和采收率的提高有重要影響。
[Abstract]:On the basis of detailed investigation of previous research results, combined with the actual geological conditions in Weiyuan area of Sichuan Basin, the heterogeneity of shale reservoir is divided into macroscopic heterogeneity. Microcosmic heterogeneity and rock mechanics heterogeneity. The macroscopic heterogeneity of shale reservoir is mainly reflected in the lateral distribution of the reservoir. The effective thickness of marine high quality shale in Lower Silurian Longmaxi formation is more than 30 m, the lateral thickness change is small, and the homogeneity is relatively good. The vertical shales are generally sandy and lime-bearing, and some of the strata are siltstone, and the vertical heterogeneity is very obvious. The fractures in the reservoir are mainly developed in the bottom section of Longmaxi formation with strong heterogeneity. The microscopic heterogeneity is mainly controlled by mineral composition and diagenesis. The development characteristics of micropores and fractures are very obvious heterogeneity. The heterogeneity of rock mechanics mainly includes Poisson's ratio, elastic modulus, brittleness and stress anisotropy. It is the key to determine the later hydraulic fracturing measures and shale gas production. The comprehensive study shows that the shale lateral homogeneity, vertical heterogeneity and reservoir fracture development characteristics of Longmaxi formation in Sichuan Basin and its periphery are good. The microcosmic heterogeneity and the rock mechanics heterogeneity are obvious, which have an important effect on the fracturing and oil recovery of shale gas wells in the later stage.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(北京)能源學(xué)院;中國(guó)石油新疆油田分公司風(fēng)城油田作業(yè)區(qū);中國(guó)石油新疆油田分公司準(zhǔn)東采油廠;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目“頁(yè)巖油、氣甜點(diǎn)構(gòu)成要素比較研究”(41472123)
【分類(lèi)號(hào)】：P618.13
【正文快照】： 0引言隨著頁(yè)巖氣資源開(kāi)發(fā)的持續(xù)推進(jìn),頁(yè)巖氣儲(chǔ)層非均質(zhì)性研究的重要性也不斷凸顯,已成為提高頁(yè)巖氣采收率的關(guān)鍵和基礎(chǔ)[1]。通過(guò)對(duì)北美已鉆的大量頁(yè)巖氣井水平層段的測(cè)錄井?dāng)?shù)據(jù)進(jìn)行分析發(fā)現(xiàn),其有機(jī)碳體積分?jǐn)?shù)、礦物成分、巖石脆性、裂縫發(fā)育情況以及含氣量等方面都存在明顯的

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