【摘要】：我國(guó)頁巖氣地質(zhì)儲(chǔ)量豐富,大致與美國(guó)相當(dāng),加強(qiáng)頁巖氣勘探開發(fā)既是滿足我國(guó)油氣需要的迫切要求,又是國(guó)家能源發(fā)展戰(zhàn)略的規(guī)劃。然而我國(guó)頁巖氣研究剛剛起步,頁巖氣相關(guān)理論研究亟待突破和完善,含氣性作為頁巖氣地質(zhì)理論的主要參數(shù)之一,其對(duì)深化頁巖氣成藏機(jī)理的研究有著很重要的促進(jìn)作用,對(duì)提高評(píng)價(jià)頁巖氣資源量的精度和確定有利優(yōu)選區(qū)有著重要的指導(dǎo)意義。本文以塔里木中生界泥頁巖為研究對(duì)象。根據(jù)實(shí)驗(yàn)結(jié)果,分析研究區(qū)地質(zhì)特征,分別建立吸附含氣量與有機(jī)碳含量、石英、粘土礦物、RO、孔隙度、巖石比表面積等因素之間的關(guān)系,優(yōu)選出影響塔里木盆地中生界泥頁巖含氣量的主控因素—有機(jī)碳含量和比表面積,其中有機(jī)碳含量是最主要的控制因素,因此建立頁巖吸附氣含量與有機(jī)碳含量單因素控制模型,其相關(guān)系數(shù)為0.742。在單因素模型基礎(chǔ)上,采用多因素?cái)M合方法,建立泥頁巖吸附含氣量多因素綜合預(yù)測(cè)模型,(相關(guān)系數(shù)為0.912,因此多因素預(yù)測(cè)模型優(yōu)于單因素預(yù)測(cè)模型)。同時(shí)對(duì)兩個(gè)模型的可靠性進(jìn)行了檢驗(yàn),并得出吸附氣含量介于0.581~2.720 m3/t。由于游離氣賦存于孔洞中,其主要受到總孔體積、比表面積、壓力和溫度因素影響,因此建立游離氣含量與這四種影響因素的模型。通過模型,計(jì)算得出塔里木盆地中生界泥頁巖游離氣含量介于0.079~1.226 m3/t�？偤瑲饬考从坞x氣與吸附氣含氣量之和,介于0.660~3.946 m3/t,含氣量較好。此外,本文還建立了賦存于孔隙中的吸附氣與游離氣含量的比重與孔隙半徑之間關(guān)系的理想模型。模型顯示,理想條件下,塔里木盆地吸附氣含量遠(yuǎn)遠(yuǎn)小于游離氣含量。因而對(duì)比實(shí)際地層的吸附氣含量(介于20.5%~79.5%),預(yù)測(cè)吸附氣主要賦存在干酪根中,并對(duì)此觀點(diǎn)進(jìn)行了簡(jiǎn)單論證。
[Abstract]:China is rich in shale gas geological reserves, which is roughly equivalent to that of the United States. Strengthening shale gas exploration and development is not only an urgent requirement to meet the oil and gas needs of our country, but also a national energy development strategy plan. However, the study of shale gas in China has just started, and the research of shale gas related theory needs to be breakthrough and consummation. As one of the main parameters of shale gas geology theory, gas bearing property plays an important role in deepening the study of shale gas reservoir formation mechanism. It has important guiding significance for improving the accuracy of shale gas resource evaluation and determining favorable optimal separation area. This paper takes the Mesozoic shale of Tarim as the research object. According to the experimental results, the relationship between adsorption gas content and organic carbon content, quartz, clay mineral ROA, porosity, specific surface area of rock, etc., was established according to the geological characteristics of the study area. The organic carbon content and specific surface area are the main controlling factors that affect the gas content of Mesozoic shale in Tarim Basin, in which organic carbon content is the main controlling factor. Therefore, a single factor control model of shale adsorption gas content and organic carbon content was established, and the correlation coefficient was 0.742. On the basis of single-factor model, the multifactor comprehensive prediction model of shale adsorption gas content is established by using multi-factor fitting method. (correlation coefficient is 0.912, so the multi-factor prediction model is superior to the single-factor prediction model). At the same time, the reliability of the two models was tested, and the adsorption gas content was found to be between 0.581and 2.720m3 / t. Because the free gas exists in the pore, it is mainly affected by the total pore volume, specific surface area, pressure and temperature, so the free gas content and these four factors are modeled. Based on the model, the free gas content of Mesozoic shale in Tarim Basin is calculated to be between 0.079 ~ 1.226 m ~ (3 / t). The total gas content, that is, the sum of free gas and adsorption gas, is between 0.660 and 3.946 m3 / t, and the gas content is better. In addition, an ideal model for the relationship between the specific gravity of adsorption gas and free gas content and the pore radius is established. The model shows that the content of adsorbed gas in Tarim Basin is much smaller than that of free gas under ideal conditions. Therefore, for the adsorption gas content (between 20.5% and 79.5%), it is predicted that the adsorbed gas mainly occurs in kerogen, and this viewpoint is proved simply.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 郝孝榮;;頁巖氣層測(cè)井響應(yīng)特征及其含氣量評(píng)價(jià)[J];科技資訊;2012年28期

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本文編號(hào)：2205506