【摘要】：為了深入探究煤巖類型與煤儲層孔裂隙的耦合關(guān)系,表征韓城礦區(qū)煤儲層孔隙縱向非均質(zhì)性,選取了韓城礦區(qū)4種煤巖類型的煤樣,采用X射線層析掃描技術(shù),模擬和重構(gòu)了韓城礦區(qū)煤儲層內(nèi)部孔裂隙、煤巖基質(zhì)和礦物的形態(tài)與空間分布格架,建立了三維立體重構(gòu)模型,實現(xiàn)了對不同煤巖類型孔裂隙分布的三維可視化精細表征。試驗結(jié)果表明:不同的煤巖類型,孔裂隙的發(fā)育程度不同,但CT變化值較為一致,基本呈雙峰分布,相較于半亮煤、半暗煤和暗淡煤,光亮煤孔裂隙發(fā)育程度最高,孔隙分布非均質(zhì)性最強,孔裂隙連通性最好,并且從光亮煤到暗淡煤,呈現(xiàn)出孔裂隙的發(fā)育程度和連通性逐漸變差,礦物充填程度和小孔含量逐漸升高的趨勢。
[Abstract]:In order to explore the coupling relationship between coal rock types and pore fractures in coal reservoirs and characterize the vertical heterogeneity of coal reservoir pores in Hancheng mining area, four coal samples of coal and rock types in Hancheng mining area were selected, and X-ray tomography scanning technique was used. This paper simulates and reconstructs the internal pore fissures, the morphology and spatial distribution of coal and rock matrix and minerals in Hancheng mining area, establishes a three-dimensional reconstruction model, and realizes the three-dimensional visualization of pore and fracture distribution of different types of coal and rock. The experimental results show that different types of coal and rock have different development degree of pore and fissure, but CT change value is consistent, and it is basically bimodal distribution. Compared with semi-bright coal, semi-dark coal and dim coal, bright coal pore fissure has the highest degree of development. The heterogeneity of pore distribution is strongest, the connectivity of pore and fissure is the best, and from bright coal to dim coal, the development degree and connectivity of pore fissure become worse, mineral filling degree and pore content increase gradually.
【作者單位】： 中國地質(zhì)大學(北京)能源學院;煤層氣開發(fā)利用國家工程研究中心煤儲層實驗室;
【基金】：國家科技重大專項資助項目(2016ZX05042-002) 國家自然科學基金資助項目(41272175) 中央高�；究蒲袠I(yè)務(wù)費專項資金資助項目(2652015331)
【分類號】：P618.13

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1 馬勇新;朱定軍;李文紅;;復合韻律油藏縱向非均質(zhì)影響數(shù)值模擬研究[J];東華理工大學學報(自然科學版);2013年S2期

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