本文選題：煤層氣　切入點(diǎn)：珠藏向斜　出處：《中國礦業(yè)大學(xué)》2015年碩士論文

【摘要】：本文以黔西珠藏向斜為研究對(duì)象,在統(tǒng)計(jì)大量煤田地質(zhì)勘探資料和煤層氣井勘探資料的基礎(chǔ)上,結(jié)合實(shí)驗(yàn)測(cè)試數(shù)據(jù),分析了研究區(qū)不同含氣系統(tǒng)的吸附-解吸特征及臨界解吸壓力分布規(guī)律;利用灰色理論確定了不同含氣系統(tǒng)臨界解吸壓力的主控因素,建立了GM(0,5)預(yù)測(cè)模型,并對(duì)16、23號(hào)煤層臨界解吸壓力進(jìn)行了預(yù)測(cè)。研究區(qū)內(nèi),不同含氣系統(tǒng)主采煤層均具有較強(qiáng)的吸附能力。在垂向上,VL和PL呈現(xiàn)波動(dòng)式變化,16號(hào)煤層臨界解吸壓力在各井田分布規(guī)律不同;在平面上,16號(hào)煤層臨界解吸壓力與含氣性分布規(guī)律基本一致。分析認(rèn)為:臨界解吸壓力本質(zhì)上受沉積環(huán)境等宏觀因素以及煤物質(zhì)組成等微觀因素的共同作用,宏觀因素制約微觀因素,二者相互耦合共同控制煤儲(chǔ)層的含氣性和吸附性特征,同時(shí)受實(shí)驗(yàn)條件的影響,三者共同決定了臨界解吸壓力的大小。利用灰色系統(tǒng)理論,分別計(jì)算了不同含氣系統(tǒng)臨界解吸壓力控制因素的灰色關(guān)聯(lián)度。其中,埋深和儲(chǔ)層壓力對(duì)三個(gè)含氣系統(tǒng)臨界解吸壓力影響均比較大,而其它因素只對(duì)個(gè)別含氣系統(tǒng)產(chǎn)生較大影響;同時(shí),依次在各含氣系統(tǒng)內(nèi)選取關(guān)聯(lián)度最大的5個(gè)影響因素建立了GM(0,5)預(yù)測(cè)模型,預(yù)測(cè)結(jié)果符合精度要求和全區(qū)一般規(guī)律,所建模型能夠用于研究區(qū)不同含氣系統(tǒng)臨界解吸壓力值的預(yù)測(cè)。
[Abstract]:In this paper, taking the Zhu-Tibet syncline in western Guizhou as the research object, based on the statistics of a large number of coalfield geological exploration data and coalbed gas well exploration data, combined with the experimental test data, The characteristics of adsorption-desorption and the distribution of critical desorption pressure in different gas-bearing systems in the study area are analyzed, and the main controlling factors of critical desorption pressure in different gas-bearing systems are determined by using grey theory. The critical desorption pressure of coal seam 1623 is predicted. The main coal seams of different gas-bearing systems have strong adsorption capacity. VL and PL fluctuate in vertical direction, and the critical desorption pressure of No. 16 coal seam is different in each mine field. On the plane, the critical desorption pressure of No. 16 coal seam is basically consistent with the gas-bearing distribution law. The analysis shows that the critical desorption pressure is essentially affected by macro factors such as sedimentary environment and microscopic factors such as coal composition, etc. Macroscopical factors restrict microcosmic factors, and they control the gas-bearing and adsorptive characteristics of coal reservoir together with each other. At the same time, under the influence of experimental conditions, the critical desorption pressure is determined by the three factors, and the grey system theory is used. The grey correlation degree of critical desorption pressure control factors of different gas-bearing systems is calculated respectively, in which the influence of buried depth and reservoir pressure on critical desorption pressure of three gas-bearing systems is relatively large. At the same time, five factors with the largest correlation degree are selected in order to establish the GM0 / 5) prediction model. The prediction results accord with the precision requirements and the general law of the whole region, and the results of the prediction are in accordance with the requirements of accuracy and the general law of the whole region, and the prediction results are in accordance with the requirements of accuracy and the general law of the whole region. The model can be used to predict the critical desorption pressure of different gas-bearing systems in the study area.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.1

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