本文選題：儲層分類 + 水淹機理　； 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：XX油田大404井區(qū)主要目的層是處于上白堊統(tǒng)時期,位于姚家組位置的葡萄花油層,具體地質(zhì)特征是三角洲前緣亞相沉積,蘊藏非常豐富的油氣資源,但是開采難度較大。此油藏被歸類為低滲透裂縫型砂巖油藏,主要存在以下特點:巖性發(fā)育較差,內(nèi)部構(gòu)造較為復(fù)雜以及油井受效性弱等。因此為了創(chuàng)建安全的開發(fā)環(huán)境,為其實施加密與注采系統(tǒng)調(diào)整提供依據(jù),進(jìn)行了水淹層導(dǎo)電規(guī)律實驗研究及水淹層評價方法研究。以儲層分類分析研究為基礎(chǔ),從水淹層導(dǎo)電機理入手,系統(tǒng)分析水淹過程中電阻率變化規(guī)律和不同類型儲層巖石物理參數(shù)變化規(guī)律,分類建立了水淹層解釋圖版和評價標(biāo)準(zhǔn)。研究了超前注水孔隙內(nèi)流體壓力變化對低滲透儲層物性和驅(qū)油效率的變化。結(jié)論認(rèn)為:(1)通過儲層巖石物理相劃分,將XX油田葡萄花油層劃分為4類,對不同儲層巖石孔隙度-滲透率求取模型進(jìn)行改進(jìn),能夠極其有效地解決中低滲儲層所出現(xiàn)的非均質(zhì)性問題。(2)通過水淹機理的實驗研究,掌握了不同儲層巖石處于水淹狀態(tài)下的電阻率變化規(guī)律。同時利用多元線性回歸方法以及應(yīng)用交會圖技術(shù),以此來處理低滲透儲層水淹層的問題,進(jìn)而全面提升水淹層解釋的正確性。(3)采用超前注水的手段,能夠在一定程度上極大地增加儲層壓力,進(jìn)而降低滲透率,使巖層更加穩(wěn)固。(4)隨著凈應(yīng)力的增加,孔隙流體壓力的逐漸降低,驅(qū)油效率逐漸降低。相反,隨著凈壓力減小,孔隙流體壓力的逐漸增加,驅(qū)油效率逐漸增加。與滲透率敏感實驗變化趨勢相同�？紫读黧w壓力上升初期驅(qū)油效率增加幅度較大,隨著孔隙流體壓力的進(jìn)一步增加,驅(qū)油效率增加幅度變小。
[Abstract]:The main target layer of Da-404 well area in XX Oilfield is the Putaohua oil layer located in the upper Cretaceous and the position of Yao Jia formation. The specific geological characteristics are delta front subfacies sedimentary, which contains very rich oil and gas resources, but the exploitation is difficult. This reservoir is classified as a low permeability fractured sandstone reservoir with the following characteristics: poor lithologic development, complex internal structure and weak oil well effectiveness. Therefore, in order to create a safe development environment and provide the basis for the adjustment of the infill and injection-production system, the experimental study on the electric conductivity law of the water-flooded layer and the evaluation method of the water-flooded layer are carried out. Based on the study of reservoir classification and analysis, the regularity of resistivity variation and rock physical parameters of different types of reservoirs during waterflooding are systematically analyzed, and the interpretation chart and evaluation standard of water-flooded layer are established. The change of fluid pressure in the pore of water injection on the physical properties and oil displacement efficiency of low permeability reservoir is studied. The conclusions are as follows: (1) according to the physical phase division of reservoir rock, Gaohua reservoir in XX oilfield is divided into 4 types, and the model of porosity and permeability of different reservoir rock is improved. It can solve the heterogeneity problem of low and low permeability reservoir very effectively. (2) through the experimental study of water-flooded mechanism, the law of resistivity variation of different reservoir rock in water-flooded state is mastered. At the same time, the multivariate linear regression method and cross plot technique are used to deal with the problem of water-flooded layer in low permeability reservoir, and the correctness of water-flooded layer interpretation is improved. (3) the method of advanced water injection is adopted. It can greatly increase the reservoir pressure to a certain extent, and then reduce the permeability and make the rock formation more stable. (4) with the increase of net stress, the pore fluid pressure decreases gradually, and the oil displacement efficiency decreases gradually. On the contrary, with the decrease of net pressure and the increase of pore fluid pressure, the displacement efficiency increases gradually. The change trend is the same as the permeability sensitive experiment. The oil displacement efficiency increases greatly at the initial stage of pore fluid pressure rise, and decreases with the further increase of pore fluid pressure.
【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】：TE31
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本文編號：2070485