本文選題：贛東北　切入點(diǎn)：古生界　出處：《中國礦業(yè)大學(xué)學(xué)報(bào)》2017年01期

【摘要】：查明下?lián)P子古生界富有機(jī)質(zhì)頁巖的礦物組成特征,對頁巖儲層礦物組成影響頁巖氣儲集、滲流運(yùn)移和開采效果進(jìn)行了研究.應(yīng)用XRD、掃描電鏡、低溫液氮和儲層敏感性實(shí)驗(yàn)系統(tǒng)分析了贛東北上震旦統(tǒng)皮園村組(Z_2p)、下寒武統(tǒng)荷塘組(∈_1h)和上二疊統(tǒng)樂平組(P_3l)3套海相頁巖的礦物組成特征.認(rèn)為3套頁巖樣品黏土礦物中伊利石含量均占絕對優(yōu)勢,高嶺石含量少,表明已經(jīng)歷晚成巖階段;沉積環(huán)境為堿性水介質(zhì)起控制作用的深水陸棚沉積環(huán)境,這種相對還原的沉積環(huán)境為頁巖氣藏的形成與演化提供了良好的沉積條件;3套頁巖礦物脆性指數(shù)高,整體上具有良好的儲層可改造性,有利于實(shí)施頁巖氣的壓裂改造,與北美和國內(nèi)上揚(yáng)子地區(qū)相比,研究區(qū)為理想的頁巖氣重點(diǎn)勘探開發(fā)層位.研究結(jié)果表明:3套頁巖礦物成分均以石英占主要優(yōu)勢(質(zhì)量分?jǐn)?shù)為46.73%~64.81%),其次為黏土礦物,同時還普遍含有方解石、白云石、菱鐵礦和黃鐵礦等礦物;3套富有機(jī)質(zhì)頁巖的黏土礦物組成都以伊利石的質(zhì)量分?jǐn)?shù)為最高(74.58%~87.00%),其次為伊/蒙間層礦物(6.44%~20.58%).皮園村組、荷塘組、樂平組脆性指數(shù)平均值分別為67.35,77.90和48.95,易于壓裂.礦物成分中石英主要影響宏孔的發(fā)育,有利于頁巖氣的滲流和運(yùn)移,但黏土礦物控制微孔的發(fā)育并與孔隙度和滲透率呈負(fù)相關(guān)關(guān)系,有利于頁巖氣的保存但不利于滲流;皮園村組和荷塘組頁巖儲層敏感性不明顯,樂平組具有中等偏弱速敏、中等偏強(qiáng)水敏和中等偏弱酸敏效應(yīng).理想的頁巖氣重點(diǎn)勘探開發(fā)層位次序可定為荷塘組皮園村組樂平組,頁巖氣開發(fā)工藝應(yīng)根據(jù)其礦物組成的變化在不同區(qū)域分別對待.
[Abstract]:Find out the Paleozoic organic rich shale mineral composition characteristics of shale reservoir mineral composition of shale gas reservoir seepage effect set, migration and exploitation effect were studied. The application of XRD, scanning electron microscopy, N2 and reservoir sensitivity analysis of the experimental system of Dan Garden Village on the Northeast Jiangxi skin shock (Z_2p), under the Cambrian Hetang formation (_1h) and two middle Jurassic Leping formation (P_3l) composition of 3 sets of marine shale mineral. The content of illite 3 shale samples of clay minerals were dominated, the content of kaolinite, showed that the late diagenetic stage experienced; sedimentary environment control for alkaline water medium the deep water shelf sedimentary environment provides good conditions and sedimentary evolution of the sedimentary environment of the relative reduction of shale gas reservoir formation; 3 sets of shale mineral brittleness index is high, the whole has good reservoir can be made of, is conducive to the implementation of 欏靛博姘旂殑鍘嬭鏀歸，

本文編號：1673855