本文關(guān)鍵詞： 古交礦區(qū) 應(yīng)力場(chǎng)模擬 高溫覆壓孔滲模擬 孔裂隙特征 孔滲地質(zhì)單元　出處：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：西山古交區(qū)塊煤層氣商業(yè)開(kāi)發(fā)潛力可觀,但目前對(duì)煤儲(chǔ)層的非均質(zhì)性認(rèn)識(shí)難以支撐全區(qū)煤層氣規(guī)模性開(kāi)發(fā)的需求。為此,本次研究在掌握地質(zhì)構(gòu)造背景的基礎(chǔ)上,采用高溫覆壓孔滲模擬手段,結(jié)合地層溫度和地層壓力模擬結(jié)果,建立了符合研究區(qū)地質(zhì)條件的煤層滲透性預(yù)測(cè)模型,以此預(yù)測(cè)區(qū)塊內(nèi)煤層孔滲性的三維空間分布特征,再結(jié)合常溫常壓條件下的孔滲分布特征,將整個(gè)區(qū)塊劃分成六個(gè)孔滲地質(zhì)單元,探討了影響煤儲(chǔ)層孔滲性的地質(zhì)因素和機(jī)理,提出了不同單元煤層氣開(kāi)采方式的建議。得出:屯蘭礦區(qū)滲透性較高,儲(chǔ)層連通性較好,非均質(zhì)性較差,是有利的的生產(chǎn)區(qū)塊,可優(yōu)先開(kāi)采;東曲礦區(qū)煤層孔裂隙發(fā)育程度較高,滲透性也較好,但由于煤體結(jié)構(gòu)破碎,產(chǎn)生的煤粒和煤粉多充填到孔裂隙空間中阻礙了煤層氣的滲流,因此在生產(chǎn)過(guò)程中要著重考慮采取措施消除煤粉;馬蘭、鎮(zhèn)城底和西曲礦的滲透性處于中等水平,儲(chǔ)層的孔裂隙發(fā)育程度較低,因此生產(chǎn)中可注重壓裂增滲技術(shù)的應(yīng)用。未開(kāi)發(fā)區(qū)塊以及西銘和杜兒坪礦區(qū)的滲透性相對(duì)較差,在生產(chǎn)中應(yīng)著重考慮壓裂增滲作用。
[Abstract]:The commercial development potential of coalbed methane in Xishan Gujiao block is considerable, but the recognition of heterogeneity of coal reservoir is difficult to support the demand for large-scale development of coalbed methane in the whole area. On the basis of mastering the geological structure background, adopting the method of high temperature overpressure pore permeability simulation and combining the results of formation temperature and formation pressure simulation, a prediction model of coal seam permeability is established, which accords with the geological conditions of the study area. In order to predict the three-dimensional spatial distribution characteristics of the porosity and permeability of coal seam in the block, combined with the distribution characteristics of pore and permeability under normal temperature and pressure, the whole block is divided into six pore and permeability geological units. This paper discusses the geological factors and mechanism affecting the porosity and permeability of coal reservoir, and puts forward some suggestions for different units of coalbed methane production methods. It is concluded that the permeability of Tunlan mining area is higher, the reservoir connectivity is better, and the heterogeneity is poor. Is a favorable production block and can be exploited preferentially; In Dongqu mining area, the development degree of coal seam hole and fracture is relatively high, and the permeability is also good. However, due to the coal body structure broken, the coal particles and coal powder are filled into the pore crack space, which hinders the seepage of coal bed methane. Therefore, measures should be taken to eliminate pulverized coal in the process of production. The permeability of Ma Lan, Zhencheng bottom and Xiqu mine is in medium level, and the porosity and fissure development degree of reservoir is low. Therefore, the application of fracturing and permeability enhancement technology can be emphasized in production. The permeability of undeveloped blocks and Ximing and Duerping mining areas is relatively poor, so the role of fracturing and permeability enhancement should be taken into account in production.
【學(xué)位授予單位】：中國(guó)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)】：TE37

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