發(fā)布時間：2018-05-01 14:02

  本文選題：潘莊區(qū)塊 + 構(gòu)造斜坡��； 參考：《中國礦業(yè)大學(xué)》2017年碩士論文

【摘要】：構(gòu)造斜坡是指受區(qū)域構(gòu)造運動或局部構(gòu)造隆升作用形成的、上部以剝蝕為主,下部沉積埋藏的斜坡區(qū),是含油氣盆地中一類非常重要的構(gòu)造單元,位于隆起到凹陷間,是盆緣、盆內(nèi)砂體堆積的主要地帶,也是大型巖性地層圈閉形成與分布的主要場所。本文選擇沁水盆地潘莊區(qū)塊煤層氣開發(fā)示范區(qū)內(nèi)的生產(chǎn)井作為研究對象,采集該區(qū)主要儲層地質(zhì)因素、主要儲層參數(shù)及排采歷史資料,通過“煤層氣儲層開發(fā)動態(tài)評價軟件系統(tǒng)”軟件與COMET3軟件對煤層氣井進行數(shù)值模擬,分析儲層參數(shù)的敏感性,建立了單井形態(tài)空間模型以及儲層地質(zhì)模型,在此基礎(chǔ)上結(jié)合GIS技術(shù)建立研究區(qū)的TIN模型并對研究區(qū)進行坡度分類,分析構(gòu)造斜坡部位在直井開發(fā)時儲層空間形態(tài)的變化,研究了構(gòu)造斜坡不同部位對單井排采時的儲層空間形態(tài)的影響,取得了以下結(jié)論:(1)利用GIS軟件對研究區(qū)煤層氣儲層原始數(shù)據(jù)進行預(yù)處理,分別提取3#煤層埋深、煤層厚度、含氣量等值線并建立TIN模型,對研究區(qū)3#煤儲層進行坡度劃分。以潘莊西區(qū)4口煤層氣排采井為研究對象,其坡度分布情況為PZC-04、PZC-05、PZC-06井位于0~5°的微緩斜坡上,PZC-03井位于5°~8°的較緩斜坡上。(2)結(jié)合儲層敏感性分析,使用“煤層氣儲層開發(fā)動態(tài)評價軟件系統(tǒng)”分析了不同滲透率及滲透率的方向性差異對單井排采儲層壓力分布的影響。從儲層壓力變化情況看出,排采初期研究區(qū)儲層壓力整體下降,但總體儲層壓力仍然大于臨界解吸壓力,之后在井筒附近的吸附氣解吸較為明顯,形成明顯的壓降漏斗;滲透率的方向性差異對單井儲層壓力分布形態(tài)的影響較大,儲層壓降漏斗在滲透率優(yōu)勢方向產(chǎn)生明顯的正效應(yīng)。(3)依據(jù)研究區(qū)儲層坡度分布模型、排采井位置分布現(xiàn)狀,結(jié)合儲層的不同構(gòu)造斜坡部位建立布井比選方案,通過數(shù)值模擬結(jié)果及單井儲層壓力空間分布形態(tài)情況得知,在研究區(qū)內(nèi)向斜中部產(chǎn)氣量高于其他部位產(chǎn)氣量;相同構(gòu)造部位坡度越大產(chǎn)氣量越高,坡度過渡帶產(chǎn)氣量高于同坡度值的非坡度過渡帶的產(chǎn)氣量;相同構(gòu)造部位且坡度帶相同的區(qū)域,坡度值越高產(chǎn)氣量越大,煤層底板標(biāo)高越高產(chǎn)氣量越大。
[Abstract]:Structural slope is formed by regional tectonic movement or local tectonic uplift. The upper slope is mainly denudated and the lower sedimentary slope is buried. It is a kind of very important structural unit in oil-bearing basin, which is located between uplift and depression and is the margin of basin. The main area of sand accumulation in basin is also the main place of formation and distribution of large lithostratigraphic traps. In this paper, the production wells in the coal-bed methane development demonstration area of Panzhuang block in Qinshui Basin are selected as the research objects, and the main reservoir geological factors, main reservoir parameters and historical data of drainage and production are collected. Through the numerical simulation of coalbed methane wells by "CBM reservoir development dynamic evaluation software system" and COMET3 software, the sensitivity of reservoir parameters is analyzed, and the single well morphological spatial model and reservoir geological model are established. On the basis of this, the TIN model of the study area is established with the GIS technology, and the slope classification of the study area is carried out, and the change of the reservoir spatial morphology of the structural slope during the development of the vertical well is analyzed. In this paper, the influence of different parts of structural slope on reservoir spatial morphology of single well drainage is studied. The following conclusions are obtained: (1) preprocessing the original data of coalbed methane reservoir in the study area by using GIS software, and extracting coal seam depth and coal seam thickness respectively. Based on the contour of gas content and TIN model, the slope of coal reservoir in the study area was divided. Taking 4 coal-bed methane drainage wells in Panzhuang Western region as the research object, the slope distribution of PZC-04 and PZC-05and PZC-06 wells is analyzed in combination with reservoir sensitivity analysis, which is located on a gentle slope of 0 擄5 擄. PZC-03 well is located on a slower slope of 5 擄or 8 擄. In this paper, the influence of different permeability and directivity difference on the pressure distribution of single well drainage reservoir is analyzed by using the "Coal bed methane Reservoir Development dynamic Evaluation system". It can be seen from the variation of reservoir pressure that the reservoir pressure in the study area at the early stage of drainage and production decreases as a whole, but the overall reservoir pressure is still greater than the critical desorption pressure, and then the adsorption gas desorption near the wellbore is more obvious, forming an obvious pressure drop funnel. The directional difference of permeability has a great influence on the pressure distribution pattern of single well reservoir. The reservoir pressure drop funnel has obvious positive effect in the dominant direction of permeability. Combined with the different structural slopes of the reservoir, the well distribution scheme was established. Through the numerical simulation results and the spatial distribution of single well reservoir pressure, the gas production in the central syncline was higher than that in the other parts. The higher the slope of the same structure is, the higher the gas production in the transition zone is, the higher the gas production in the non-slope transitional zone with the same slope value, the higher the gas yield in the same structural area and the same slope zone. The higher the height of coal seam floor, the greater the volume of gas.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD841

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