本文選題：構(gòu)造 + 煤儲層�。� 參考：《中國礦業(yè)大學(xué)》2015年碩士論文

【摘要】：本文以松藻礦區(qū)構(gòu)造與煤體結(jié)構(gòu)為研究對象,以礦井地質(zhì)資料為基礎(chǔ),深入分析礦區(qū)構(gòu)造特征,揭示了構(gòu)造發(fā)育與分布規(guī)律;在區(qū)域構(gòu)造背景基礎(chǔ)上,闡明了構(gòu)造演化序次,并對礦區(qū)構(gòu)造復(fù)雜程度進行了定量評價;研究礦區(qū)主采煤層儲層特征,劃分礦區(qū)煤體結(jié)構(gòu)類型,探討了地質(zhì)構(gòu)造對構(gòu)造煤的控制作用,并選擇合適指標對礦區(qū)M8煤煤體變形程度進行了模糊綜合評判。研究表明,研究區(qū)構(gòu)造在平面上形成向西突的“鼓包”形態(tài)。“鼓包”內(nèi)發(fā)育有一系列次級褶皺,褶皺表現(xiàn)出向北東方向收攏,西南端撒開的放射狀。褶皺強度自東南向西北逐漸降低,最后形成單斜構(gòu)造。研究區(qū)斷裂較為發(fā)育,但分布不均勻,大中型斷層與小型斷層走向皆集中在N、NNE方向,具有很好的一致性,斷層與褶皺的成生關(guān)系密切。研究區(qū)構(gòu)造形態(tài)及其演化皆受邊界控制,燕山期礦區(qū)受南北向擠壓力,形成短軸狀背斜雛形,喜山期形成了NNE向主體褶皺,是礦區(qū)構(gòu)造的定型期。運用構(gòu)造曲率法和煤層傾角絕對值對礦區(qū)褶皺構(gòu)造進行了定量評價,礦區(qū)東部曲率值和傾角絕對值皆大于西部;運用斷層強度和分維值對斷裂進行了定量評價,礦區(qū)斷層強度和分維最大值集中在松藻礦F1逆斷層組、渝陽礦羊叉灘背斜核部正斷層組和礦區(qū)南部逢春礦F2逆斷層組三處。將以上各指標的評價成果歸一化,并賦予不同權(quán)重進行了綜合定量評價,“鼓包”內(nèi)構(gòu)造復(fù)雜程度綜合指數(shù)值呈現(xiàn)出向東逐漸增大的趨勢,在礦區(qū)北部則表現(xiàn)為由中部高指數(shù)值向四周遞減的趨勢,指數(shù)值與基于斷裂和褶皺的定量評價特征保持一致。分析認為M8煤變質(zhì)程度高,成熟度高,Ro,max在2.5%左右;鏡質(zhì)組含量介于52.1-78.3%之間,無機組分含量相對較高;小孔及微孔較為發(fā)育,具有較大的比表面積和孔體積,孔隙率達8.53%;顯微裂隙也較為發(fā)育。M8煤煤體結(jié)構(gòu)在不同構(gòu)造部位差異明顯:單斜處以Ⅰ類正常結(jié)構(gòu)煤為主,煤體結(jié)構(gòu)受構(gòu)造擾動小;寬緩褶皺處煤體結(jié)構(gòu)以Ⅱ類過渡性結(jié)構(gòu)煤為主,地質(zhì)構(gòu)造對其影響明顯;斷層帶附近及緊湊褶皺處煤體結(jié)構(gòu)以Ⅲ類構(gòu)造煤為主,構(gòu)造對煤體結(jié)構(gòu)有著明顯的控制作用。運用模糊綜合評判法對礦區(qū)M8煤煤體變形程度進行了評判,ⅲ類單元44個,ⅱ類單元61個,Ⅰ類單元24個,ⅱ+ⅲ類占總數(shù)的81.4%,松藻礦區(qū)M8煤體變形程度總體上是中等偏復(fù)雜,并從煤與瓦斯突出點分布特征與測井解譯構(gòu)造煤分布特征中得到了驗證。
[Abstract]:This paper takes Songzao mining area structure and coal body structure as the research object, based on the mine geological data, deeply analyzes the structural characteristics of the mining area, reveals the tectonic development and distribution law, and on the basis of the regional tectonic background, clarifies the sequence of tectonic evolution. The structural complexity of the mining area is evaluated quantitatively, the reservoir characteristics of the main mining seam in the mining area are studied, the types of coal body structure in the mining area are divided, and the controlling effect of geological structure on the tectonic coal is discussed. The degree of deformation of M 8 coal body in mining area is evaluated by fuzzy comprehensive evaluation. The study shows that the structure of the study area forms a westward "bulge" shape on the plane. There are a series of secondary folds in the "tympanic fold". The fold shows a radial shape of the north-east direction and the southwest end. The fold strength gradually decreased from southeast to northwest, and finally formed monoclinal structure. The faults in the study area are relatively developed, but the distribution is not uniform. The strike of large and medium faults and small faults are concentrated in the NNNE direction, which has good consistency, and the fault is closely related to the formation of folds. The structural morphology and evolution of the study area are controlled by the boundary. The Yanshanian mining area was subjected to the south-north extrusion pressure, forming the embryonic form of the short axial anticline, and the Himalayan stage formed the NNE main fold, which is the formative stage of the ore area structure. The fold structure in mining area is evaluated quantitatively by using the method of structural curvature and absolute value of coal seam dip angle, the curvature value and the absolute value of dip angle in the eastern part of the mining area are larger than those in the west, and the fault strength and fractal dimension value are used to quantitatively evaluate the fault. The maximum fault strength and fractal dimension are concentrated in the F1 reverse fault group of Songzao ore deposit, the normal fault group of the Yangchitan anticline core in Yuyang Mine and the F2 reverse fault group of Fangchun Mine in the south of the mining area. The evaluation results of the above indexes are normalized and given different weights to carry out comprehensive quantitative evaluation. The comprehensive index values of the structural complexity in the "drum bag" show a trend of increasing gradually to the east. In the northern part of the mining area, there is a decreasing trend from the high index value in the middle part to the surrounding area, and the index value is consistent with the quantitative evaluation characteristics based on faults and folds. The results show that M8 coal has high metamorphic degree, high maturity, high Roxmax is about 2.5%, vitrinite content is between 52.1-78.3%, inorganic component content is relatively high, micropore and micropore are relatively developed, and have larger specific surface area and pore volume, the content of vitrinite is between 52.1-78.3%, and the content of inorganic component is relatively high. The porosity of coal is 8.53, and the microstructure of coal body of M8 coal is different in different structural parts. The coal structure is dominated by type I normal coal, and the structure of coal body is less disturbed by structure. The coal body structure in wide and slow fold is mainly type 鈪，

本文編號：1982815