本文關(guān)鍵詞：長(zhǎng)寧區(qū)塊下古生界龍馬溪及筇竹寺組頁(yè)巖儲(chǔ)層特征研究及評(píng)價(jià)　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 筇竹寺組 龍馬溪組 頁(yè)巖氣 儲(chǔ)集空間類型 微觀孔喉結(jié)構(gòu) 儲(chǔ)層評(píng)價(jià)

【摘要】：本文以四川盆地南部長(zhǎng)寧地區(qū)筇竹寺及龍馬溪組頁(yè)巖為研究對(duì)象,在綜合總結(jié)前人研究成果基礎(chǔ)上,利用覆壓脈沖孔滲、X射線衍射、X射線熒光、陰極發(fā)光、X射線能譜定量分析、氬離子拋光、掃描電鏡、高壓壓汞、低溫氮?dú)馕�、核磁共振、巖石力學(xué)等實(shí)驗(yàn)手段,深入研究筇竹寺及龍馬溪組頁(yè)巖孔滲特征、礦物組成、有機(jī)碳含量、孔縫類型及發(fā)育特征、儲(chǔ)集空間類型、孔分布特征等,最終完成了儲(chǔ)層評(píng)價(jià)參數(shù)的選取和主控因素的探討,主要取得了以下成果:(1)從區(qū)域地質(zhì)概況、巖石學(xué)特征、有機(jī)質(zhì)豐度、物性特征等四個(gè)方面對(duì)長(zhǎng)寧區(qū)塊筇竹寺及龍馬溪組泥頁(yè)巖儲(chǔ)層進(jìn)行綜合研究,并與安徽蕪湖區(qū)塊二疊系及志留系等多套頁(yè)巖儲(chǔ)層和北美典型頁(yè)巖儲(chǔ)層進(jìn)行對(duì)比,發(fā)現(xiàn)三者之間具有一定的相似性。(2)頁(yè)巖儲(chǔ)集空間包括裂縫和基質(zhì)孔隙兩大類,按照成因來源可將基質(zhì)孔隙區(qū)分為:無機(jī)孔、有機(jī)質(zhì)孔和生物成因孔;裂縫根據(jù)構(gòu)造成因可分為:原生縫和次生縫。其中龍馬溪組頁(yè)巖中有機(jī)質(zhì)孔、粘土礦物層間微孔及粒間微孔發(fā)育;筇竹寺組粘土礦物層間微孔、粘土礦物微晶間孔、有機(jī)質(zhì)孔及顆粒內(nèi)微溶孔發(fā)育。(3)長(zhǎng)寧區(qū)塊龍馬溪組頁(yè)巖孔隙度分布在1.84～9.10%之間,平均為4.07%,主要分布在2～6%之間;滲透率分布在1.75～1250nD之間,平均為90.83nD,主要分布在1～50nD之間。筇竹寺組頁(yè)巖的物性比龍馬溪組差得多,平均孔隙度僅為1.446%,滲透率相比也低很多,表現(xiàn)出極強(qiáng)的非均質(zhì)性。(4)龍馬溪及筇竹寺組高壓壓汞曲線分別為極細(xì)歪度分選差型及中歪度分選差型,退汞效率極低,壓汞參數(shù)反應(yīng)出頁(yè)巖具有孔喉小及分選差的特點(diǎn);與此同時(shí),兩組地層頁(yè)巖吸附曲線均為Ⅱ型吸附等溫線,具有縫狀的孔隙結(jié)構(gòu)特征。就吸附參數(shù)對(duì)比而言,龍馬溪組比表面值、孔容均較高,筇竹寺組相對(duì)較低,且發(fā)現(xiàn)泥頁(yè)巖比表面值與碳酸鹽礦物及TOC含量有一定的相關(guān)性。(5)綜合低溫氮?dú)馕�、核磁共振、高壓壓汞三種方法的優(yōu)缺點(diǎn),建立了較精確測(cè)試泥頁(yè)巖孔徑分布的方法,發(fā)現(xiàn)龍馬溪組泥頁(yè)巖微孔十分發(fā)育,占59.38%,大孔孔較發(fā)育,占38.24%,中孔極不發(fā)育;筇竹寺組泥頁(yè)巖大孔發(fā)育,占83.66%,微孔及中孔極不發(fā)育,僅占16.34%,這可能是導(dǎo)致吸附氣少的重要因素。(6)儲(chǔ)層評(píng)價(jià)篩選的參數(shù)為孔隙度、滲透率、TOC以及脆性礦物含量,并制定了分類標(biāo)準(zhǔn),評(píng)價(jià)結(jié)果為龍馬溪組頁(yè)巖為較好的儲(chǔ)層,筇竹寺組頁(yè)巖為非儲(chǔ)層。經(jīng)分析認(rèn)為,有機(jī)質(zhì)、脆性礦物含量、粘土礦物含量及微孔的發(fā)育程度是形成優(yōu)質(zhì)頁(yè)巖儲(chǔ)層的重要因素。
[Abstract]:In this paper, the shale of Qiongzhusi and Longmaxi formation in Changning area of southern Sichuan Basin is taken as the research object. On the basis of synthetically summarizing the previous research results, X-ray fluorescence and cathodoluminescence are obtained by X-ray diffraction and cathodoluminescence. X-ray energy dispersive analysis, argon ion polishing, scanning electron microscope, high pressure mercury pressure, low temperature nitrogen adsorption, nuclear magnetic resonance, rock mechanics and other experimental means, in-depth study of shale permeability characteristics of Qiongzhusi and Longmaxi formation. Mineral composition, organic carbon content, pore fracture type and development characteristics, reservoir space type, pore distribution characteristics and so on, finally completed the selection of reservoir evaluation parameters and main control factors. The main achievements are as follows: (1) the shale reservoirs of Qiongzhusi and Longmaxi formation in Changning area are studied synthetically from four aspects: regional geological survey, petrological characteristics, abundance of organic matter and physical properties. It is compared with several sets of shale reservoirs such as Permian and Silurian systems in Wuhu block Anhui Province and typical shale reservoirs in North America. It is found that there is a certain similarity among the three types. The shale reservoir space includes two types: fracture and matrix pore. According to the origin source, the matrix pore can be divided into inorganic pore, organic pore and biogenic pore; The fractures can be divided into primary and secondary fractures according to their tectonic origin, in which organic pore, interlaminar micropore and intergranular micropore are developed in the shale of Longmaxi formation; The porosity of the shale of Longmaxi formation in Changning block is between 1.84% and 9.10%. The average value was 4.07, mainly between 2% and 6%. The permeability distribution is between 1.75 and 1250nD, with an average of 90.83nD, mainly in the range of 110nD. The physical properties of Qiongzhusi formation shale are much worse than those of Longmaxi formation. The average porosity is only 1.446 and the permeability is much lower. The high pressure mercury injection curves of Longmaxi and Qiongzhusi formation are very fine deviation type and middle skew type respectively, and the efficiency of mercury removal is very low. Mercury injection parameters show that shale has the characteristics of small pore throat and poor sorting. At the same time, the adsorption curves of the two groups of shale are type 鈪，

本文編號(hào)：1386325