本文選題：西湖凹陷 + 花港組　； 參考：《地球科學(xué)》2017年09期

【摘要】：在西湖凹陷花港組低滲儲層背景下,優(yōu)質(zhì)儲層的發(fā)育伴隨綠泥石和硅質(zhì)膠結(jié)的同時富集,這與綠泥石抑制硅質(zhì)膠結(jié)的觀點存在矛盾.綜合利用X衍射、鑄體薄片、包裹體測試和掃描電鏡及能譜分析等資料,以綠泥石分類及其成因分析為基礎(chǔ),通過對比不同粒度儲層綠泥石和硅質(zhì)膠結(jié)分布規(guī)律,結(jié)合地層條件和儲層質(zhì)量演化,分析綠泥石對硅質(zhì)膠結(jié)的影響.研究結(jié)果表明:綠泥石發(fā)育孔隙襯里和孔隙充填兩種產(chǎn)狀,孔隙襯里綠泥石由早期黏土薄膜重結(jié)晶或直接由孔隙流體結(jié)晶而成,孔隙充填綠泥石受控于火山碎屑和長石溶蝕;綠泥石和硅質(zhì)膠結(jié)均在物性較好的粗粒儲層中富集;淺埋低地溫階段,孔隙襯里綠泥石有效抑制硅質(zhì)膠結(jié),僅在綠泥石不連續(xù)或顆粒破裂處發(fā)育孤立柱狀石英晶體,深埋高地溫階段,難以有效抑制硅質(zhì)膠結(jié),多發(fā)育石英加大邊;粗粒儲層比細(xì)粒和砂質(zhì)礫巖及泥礫巖儲層孔隙發(fā)育,為石英加大邊提供必要的生長空間,導(dǎo)致綠泥石相對含量更高的粗粒儲層中硅質(zhì)膠結(jié)也更發(fā)育.
[Abstract]:Under the background of low permeability reservoir of Huagang formation in Xihu sag, the development of high quality reservoir is accompanied by the simultaneous enrichment of chlorite and siliceous cementation, which contradicts the viewpoint that chlorite inhibits siliceous cementation. Based on the data of X-ray diffraction, thin sheet casting, inclusion testing, scanning electron microscope and energy dispersive analysis, and based on the classification and genetic analysis of chlorite, the distribution of chlorite and siliceous cementation in different grain size reservoirs is compared. Combined with formation conditions and reservoir quality evolution, the influence of chlorite on siliceous cementation is analyzed. The results show that: chlorite develops pore lining and pore filling, pore lining chlorite is formed by early clay film recrystallization or directly by pore fluid crystallization, pore filling chlorite is controlled by pyroclastic and feldspar dissolution; Both chlorite and siliceous cementation are enriched in coarse grained reservoirs with good physical properties. At the stage of shallow buried low ground temperature, pore lining chlorite effectively inhibits siliceous cementation, and only develops isolated columnar quartz crystals at sites of chlorite discontinuity or particle rupture. At the stage of deep buried highland temperature, it is difficult to restrain the siliceous cementation effectively, and the coarse grain reservoir is more developed than fine grain, sandy conglomerate and mud conglomerate reservoir, which provides the necessary growth space for the quartz increasing edge, and the coarse grain reservoir is more developed than fine grain, sand conglomerate and mud conglomerate reservoir. Silica cementation is also more developed in coarse grained reservoirs with higher relative content of chlorite.
【作者單位】： 中國石油大學(xué)地球科學(xué)與技術(shù)學(xué)院;山東省油藏地質(zhì)重點實驗室;中海石油有限公司上海分公司;
【基金】：國家科技重大專項(No.2016ZX05027-004) 國家自然科學(xué)基金面上項目(No.41672129)
【分類號】：P618.13

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本文編號：2002742