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中華人民共和國(guó)地質(zhì)礦產(chǎn)行業(yè)標(biāo)準(zhǔn)DZ/T0032—92

地質(zhì)勘查鉆探巖礦心管理通則

1  主題內(nèi)容與適用范圍

巖礦心是地質(zhì)勘查工作中的一項(xiàng)重要基礎(chǔ)實(shí)物資料，是研究和評(píng)價(jià)地質(zhì)礦產(chǎn)的重要依據(jù)。為妥善保護(hù)和保存巖礦心資料，根據(jù)《中華人民共和國(guó)礦產(chǎn)資源法》第二十四條規(guī)定，特制定本標(biāo)準(zhǔn)。

1.1  主題內(nèi)容

本標(biāo)準(zhǔn)規(guī)定了地質(zhì)勘查鉆探巖礦心(含巖屑,下同)的現(xiàn)場(chǎng)管理、縮減處理、移交入庫(kù)和庫(kù)房管理。

1.2  適用范圍

本標(biāo)準(zhǔn)適用于地質(zhì)勘查行業(yè)鉆探巖礦心的全程管理。

2  巖礦心的現(xiàn)場(chǎng)管理

2.1  鉆前準(zhǔn)備

2.1.1  平整機(jī)場(chǎng)時(shí)，機(jī)臺(tái)要平出放置巖礦心的場(chǎng)地，并有防雨和遮陽(yáng)設(shè)施。

2.1.2  開(kāi)鉆前,機(jī)臺(tái)(井隊(duì))應(yīng)將鉆孔(井)地質(zhì)編錄所需的各種物資，包括巖礦心裝具和用于巖礦心編號(hào)的書寫工具、材料等準(zhǔn)備好，沒(méi)有足夠的巖心箱不得開(kāi)鉆。

2.2  鉆孔(井)取心

2.2.1  采取巖礦心應(yīng)嚴(yán)格按照巖心鉆探操作規(guī)程和項(xiàng)目地質(zhì)設(shè)計(jì)的有關(guān)規(guī)定執(zhí)行。

2.2.2  退取巖礦心，嚴(yán)禁吊打巖心管，避免巖礦心人為破碎或次序顛倒。對(duì)于松軟巖礦心要盡量保持原狀。

2.3  巖礦心整理

2.3.1  從巖心管取出的巖礦心應(yīng)按其出筒的順序擺放，隨即進(jìn)行清洗。巖屑要用清水漂洗,以露出巖石本色為準(zhǔn)。不能水洗的巖礦心(鹽類礦產(chǎn)和含油氣巖心等)應(yīng)揩去泥漿或除去泥皮。并清除假巖心和外來(lái)混雜物質(zhì)。

2.3.2  將清理好的巖礦心按由淺至深的順序從左到右、自上而下依次擺放在巖心箱(盒)內(nèi)。

巖屑以及中心取樣(center sample recovery)鉆孔樣品應(yīng)先進(jìn)行干燥處理，一般可采用自然晾曬的干燥方法，必要時(shí)采用可控溫或低溫烘干，禁止高溫烘烤。經(jīng)干燥處理后的巖屑，應(yīng)連同標(biāo)簽一并裝入巖屑袋內(nèi)。CSR樣品晾干后先行縮分，作為地質(zhì)副樣的一份裝袋保留。從微型旋流器收集的柱狀樣品需要時(shí)可作為巖性實(shí)物剖面保存。

2.3.3  松散、破碎的巖礦心應(yīng)按其所在位置分段裝入袋內(nèi)。易揮發(fā)、潮解和易于氧化的巖礦心要及時(shí)裝入密閉容器保存。對(duì)油基泥漿取心和密閉取心井的油砂必須立即用無(wú)色玻璃紙或油紙包好用蠟密封，以便取得含油飽和度等有關(guān)資料。

2.3.4  巖礦心丈量要準(zhǔn)確。丈量時(shí)應(yīng)盡量將各自然斷塊對(duì)接好，對(duì)于松散、破碎的巖心不得隨意拉長(zhǎng)或壓縮,必要時(shí)可采用體積法換算其長(zhǎng)度。

2.3.5  所有巖礦心均需按回次(簡(jiǎn)次)統(tǒng)一編號(hào)。凡長(zhǎng)度大于10cm的巖心(礦心為5 cm)直接在圓柱面上或橫切面上編號(hào)；小于上述長(zhǎng)度的巖礦心分段裝袋后編號(hào)。

2.3.6  編號(hào)時(shí)，用紅(白)漆或油浸色筆寫明回次號(hào)(左側(cè))、本回次巖心總塊數(shù)(分母)和該塊巖心的序號(hào)(分子)，如圖1所示。其右端應(yīng)為靠近孔底(或鉆頭)的一端。袋裝巖礦心只在袋上標(biāo)記，袋內(nèi)放入標(biāo)簽。

圖1

2.3.7  每個(gè)回次的巖礦心整理后應(yīng)當(dāng)即填寫巖心牌(票)，寫明本回次取心數(shù)據(jù)，并置于本回次巖礦心的末端。巖心牌采用木牌，其外加套透明薄塑。巖心牌格式如圖2所示。

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