本文關(guān)鍵詞： 臨興區(qū)塊 煤系非常規(guī)天然氣 共采 地質(zhì)評價 有利區(qū)　出處：《中國礦業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：鄂爾多斯盆地石炭二疊紀(jì)煤系非常規(guī)天然氣(煤系氣)十分富集,近年來勘探試驗(yàn)不斷取得突破,但共采潛力及其非均質(zhì)性分布不明,后續(xù)開發(fā)亟待共采可行性地質(zhì)評價方法的支持。為此,本文剖析了該區(qū)煤系氣儲層空間展布及其發(fā)育特征,研究了不同類型儲層含氣性識別方法,探討了煤系氣成藏的地質(zhì)控制作用,建立了煤系氣單采、共采地質(zhì)模型和綜合評價方法體系。結(jié)果表明:該區(qū)煤系烴源巖有機(jī)質(zhì)以Ⅲ型為主,成熟度較高,氣源充足;多個主煤儲層發(fā)育范圍廣且厚度大,太原組砂巖儲層在局部地區(qū)厚度和含氣性均相對較大,成巖溶蝕孔較發(fā)育,是潛在的有利儲層。根據(jù)樣品測試、氣測錄井資料和測井解釋,耦合沉積、成巖、水文、構(gòu)造等地質(zhì)因素,綜合分析了煤系不同類型儲層的空間展布特征及含氣性分布規(guī)律,優(yōu)選出影響煤系氣單采和共采的地質(zhì)因素,提煉出主煤層與砂巖儲層的四種生儲蓋模式。采用灰色關(guān)聯(lián)法,結(jié)合煤層氣和煤系致密砂巖氣共采產(chǎn)能數(shù)值模擬,以20%和80%的單類儲層產(chǎn)氣量累計貢獻(xiàn)率作為確定共采可行性界限值�；诋a(chǎn)能公式計算共采綜合評價指數(shù),對比共采可行性界限值,得到綜合評價指數(shù)4.44、8E-7、9E-4三個關(guān)鍵界限值。根據(jù)關(guān)鍵界限值將共采可行性劃分為四類,分析了各類產(chǎn)層組合的共采可行性,預(yù)測和評價了共采有利區(qū)的區(qū)域分布。
[Abstract]:Carboniferous Permian unconventional natural gas (CBG) is very rich in Ordos Basin. In recent years, exploration experiments have made a breakthrough, but the potential of co-production and its heterogeneity distribution are unknown. The following development is urgent to be supported by the geological evaluation method of co-production feasibility. Therefore, the spatial distribution and development characteristics of coal-measure gas reservoirs in this area are analyzed, and the identification methods of gas-bearing properties of different types of reservoirs are studied. The geological control of coal-measure gas accumulation is discussed, and the geological model and comprehensive evaluation system of coal-measure gas single recovery and co-production are established. The results show that the organic matter of coal-measure hydrocarbon source rocks in this area is mainly type 鈪，

本文編號：1446804