本文選題：煤層氣 + 垂直井��； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)經(jīng)濟(jì)的快速騰飛和日益加劇的缺油少氣能源現(xiàn)狀,國(guó)家對(duì)煤層氣能源的開發(fā)需求日益倍增。高效開發(fā)煤層氣,煤層含氣量是開發(fā)基礎(chǔ)、滲透性是開發(fā)關(guān)鍵、合理的排采制度是開發(fā)保障。本論文在總結(jié)國(guó)內(nèi)外學(xué)者研究煤層滲透率在排采階段動(dòng)態(tài)變化規(guī)律和煤層氣井排采規(guī)律的基礎(chǔ)上,運(yùn)用煤層氣地質(zhì)與開發(fā)的理論知識(shí),針對(duì)國(guó)內(nèi)絕大多數(shù)低壓低滲煤層氣井,建立煤層氣井水力壓裂后滲透率預(yù)測(cè)模型,并將大多數(shù)煤層氣垂直氣井水力壓裂后的排采階段分為飽和水單相流階段、非飽和水單相流階段、氣水兩相流定排采階段、定壓階段和氣水兩相流僅在某些方向傳遞的定排采階段、定壓階段六個(gè)階段,結(jié)合煤層地質(zhì)參數(shù)和現(xiàn)場(chǎng)增產(chǎn)改造施工參數(shù),通過(guò)排采階段煤層滲透率動(dòng)態(tài)變化這條主線將六個(gè)階段串聯(lián)起來(lái),數(shù)值分析不同排采階段由井底壓力變化引起的產(chǎn)水量、產(chǎn)氣量、動(dòng)液面高度、井底流壓、解吸半徑和壓力傳播半徑六個(gè)工程參數(shù)的變化,編寫煤層氣單井排采制度優(yōu)化軟件,從理論上對(duì)排采制度進(jìn)行細(xì)化。同時(shí),以試驗(yàn)井Y1井的地質(zhì)分析、巖芯分析、試井資料分析以及水力壓裂現(xiàn)場(chǎng)數(shù)據(jù)為基礎(chǔ),將編制的煤層氣井排采制度優(yōu)化軟件工程應(yīng)用于Y1井,進(jìn)行模擬并建立合理的排采制度。用模擬得到的數(shù)據(jù)對(duì)煤層氣井排采制度的影響因素進(jìn)行分析,從而加深對(duì)煤層氣井排采制度的認(rèn)識(shí)。
[Abstract]:With the rapid development of China's economy and the increasing shortage of oil and gas, the demand for coal-bed methane (CBM) energy is increasing. High efficiency development of coalbed methane, coal seam gas content is the basis of development, permeability is the key to development, reasonable drainage system is the development guarantee. On the basis of summing up the domestic and foreign scholars' research on the dynamic change law of coal seam permeability in the stage of coal seam drainage and the rule of coal bed methane well drainage, this paper applies the theoretical knowledge of coal bed methane geology and development to the vast majority of low pressure and low permeability coal bed methane wells in China. The permeability prediction model of coalbed methane wells after hydraulic fracturing is established, and the recovery stage after hydraulic fracturing in most coalbed methane vertical gas wells is divided into saturated water single-phase flow stage, unsaturated single-phase flow stage, gas-water two-phase flow stage and fixed drainage stage. The constant pressure stage and gas-water two-phase flow are only transferred in some directions in the fixed discharge mining stage, the constant pressure stage in six stages, combined with the coal seam geological parameters and site production and reconstruction of construction parameters. Through the main line of dynamic change of coal seam permeability in drainage stage, the six stages are connected in series, and the water production, gas production, dynamic liquid level height, bottom hole flow pressure caused by the change of bottom hole pressure in different drainage stages are numerically analyzed. Based on the variation of six engineering parameters of desorption radius and pressure propagation radius, the optimization software of coal bed methane single well drainage system is compiled, and the drainage system is refined theoretically. At the same time, based on the geological analysis, core analysis, well test data analysis and hydraulic fracturing field data of well Y1, the software engineering for optimizing production system of coalbed methane well is applied to Y1 well. Carry out simulation and establish reasonable drainage system. By using the simulated data, the influencing factors of the coal bed methane well drainage system are analyzed, and the understanding of the coal bed gas well drainage system is deepened.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE37

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