本文選題：扶余油層 + 儲層物性��； 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：葡南油田扶余油層屬于低孔特低滲儲層,前期開發(fā)過程采用了縫網(wǎng)壓裂技術(shù),進(jìn)行壓裂開發(fā)。隨生產(chǎn)時間的延長,地層能量消耗較大,無法得到有效補(bǔ)充,產(chǎn)量遞減較快,采出程度較低,這嚴(yán)重制約和影響到油田開發(fā)效果和經(jīng)濟(jì)效益。為此,必須尋求進(jìn)一步挖掘油層剩余潛力和提高原油采收率技術(shù)措施�？紤]到扶余油層巖石孔隙較小,存在較強(qiáng)的毛管力和儲層滲透率較低,無法有效補(bǔ)充地層能量,具有滲吸采油提高原油采收率和吞吐的潛力。針對礦場實(shí)際需求,本文以自生CO2增能吞吐技術(shù)和優(yōu)化滲吸液性能提高滲吸采收率為目標(biāo),以油田化學(xué)、油層物理和膠體表面化學(xué)為理論指導(dǎo),以化學(xué)分析、儀器檢測和物理模擬為技術(shù)手段,以葡南油田扶余油層為研究平臺,從儲層巖石物性與流體性質(zhì)研究、增能劑體系性能評價、滲吸液體系篩選及性能評價、人造巖心制作工藝、裂縫巖石滲吸效果及其影響因素研究、縫網(wǎng)壓裂仿真模型裂縫參數(shù)對增能滲吸效果及其影響因素研究等方面著手,開展了縫網(wǎng)壓裂井增能吞吐三維巖心物模實(shí)驗。結(jié)果表明,隨油藏壓力升高,CY表面活性劑滲吸采收率增加。隨注入速度增大,滲吸采收率呈現(xiàn)出“先增加后減小”變化趨勢。隨滲吸液注入段塞尺寸增加,滲吸采收率增加,但增幅減小。隨憋壓時間延長,滲吸采收率增加,但增幅逐漸減小;隨交替注入次數(shù)增加,滲吸采收率增加,但增幅逐漸減小。隨仿真模型主縫長度和分支縫條數(shù)增加,滲吸采收率增加,但增幅逐漸減小。隨“增能劑+滲吸液”組合實(shí)施時油井含水率增大,采收率增幅逐漸下降。隨“增能劑+滲吸液”組合的注入量和燜井時間逐漸增大,采收率增幅呈逐漸上升趨勢,但幅度逐漸減小。隨“增能劑+滲吸液”組合的注入速度和段塞尺寸增加,采收率增幅呈先升后降趨勢。
[Abstract]:Fuyu reservoir in Punan Oilfield belongs to low porosity and low permeability reservoir. With the prolongation of production time, the formation energy consumption is large, which can not be effectively replenished, the production decreases rapidly and the recovery degree is low, which seriously restricts and affects the development effect and economic benefit of oil field. Therefore, it is necessary to further explore the remaining potential of the reservoir and improve the oil recovery technical measures. Considering that the rock porosity of Fuyu reservoir is small, the reservoir permeability and capillary force are low, and the formation energy can not be effectively replenished, it has the potential of oil permeability and oil recovery to improve oil recovery and huff and puff. In order to meet the actual demand of mine field, this paper aims at the technology of in-situ CO2 energy stimulation and puff, and optimizes the performance of permeation and liquid absorption to improve the permeability and recovery, and takes the theory of oil field chemistry, reservoir physics and colloid surface chemistry as the theoretical guidance, and takes chemical analysis as the basis. Based on the research platform of Fuyu reservoir in Punan Oilfield, the instrument test and physical simulation are used to study the physical and fluid properties of reservoir rock, the performance evaluation of energy enhancer system, the screening and performance evaluation of permeating and absorbing system, and the artificial core making process. Based on the study of permeability absorption effect of fractured rock and its influencing factors, and the research of fracture parameters of fracture mesh fracturing simulation model on the energy increasing permeability effect and its influencing factors, the three-dimensional core model experiment of energy increasing, huff and puff in fracture mesh fracturing well is carried out. The results show that the permeability and oil recovery of CY surfactant increase with the increase of reservoir pressure. With the increase of injection rate, the permeability recovery shows a trend of "increase first and then decrease". With the increase of slug size, the permeability recovery factor increases, but the increase decreases. With the increase of pressure holding time, the permeability recovery increased, but the increase gradually decreased, and with the increase of alternate injection times, the permeation recovery increased, but the increase gradually decreased. With the increase of the length of the main seam and the number of branch cracks in the simulation model, the absorption recovery factor increases, but the increase decreases gradually. The oil well water cut increases and the oil recovery increases gradually with the combination of "energy enhancer permeating and absorbing liquid". With the increase of injection rate and braised well time of the combination of "energy enhancer permeation and absorption", the increase of recovery factor is gradually increasing, but the amplitude is gradually decreasing. With the increase of injection rate and slug size of the combination of "energy enhancer osmosis and absorbent", the oil recovery increased first and then decreased.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE311;TE357

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

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本文編號：1876418