本文關鍵詞： 古交礦區(qū) 應力場模擬 高溫覆壓孔滲模擬 孔裂隙特征 孔滲地質單元　出處：《中國礦業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：西山古交區(qū)塊煤層氣商業(yè)開發(fā)潛力可觀,但目前對煤儲層的非均質性認識難以支撐全區(qū)煤層氣規(guī)模性開發(fā)的需求。為此,本次研究在掌握地質構造背景的基礎上,采用高溫覆壓孔滲模擬手段,結合地層溫度和地層壓力模擬結果,建立了符合研究區(qū)地質條件的煤層滲透性預測模型,以此預測區(qū)塊內煤層孔滲性的三維空間分布特征,再結合常溫常壓條件下的孔滲分布特征,將整個區(qū)塊劃分成六個孔滲地質單元,探討了影響煤儲層孔滲性的地質因素和機理,提出了不同單元煤層氣開采方式的建議。得出:屯蘭礦區(qū)滲透性較高,儲層連通性較好,非均質性較差,是有利的的生產(chǎn)區(qū)塊,可優(yōu)先開采;東曲礦區(qū)煤層孔裂隙發(fā)育程度較高,滲透性也較好,但由于煤體結構破碎,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的應用。未開發(fā)區(qū)塊以及西銘和杜兒坪礦區(qū)的滲透性相對較差,在生產(chǎn)中應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.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE37

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