【摘要】：針對現(xiàn)有油藏注入水利用狀況評價方法不能適應油藏階段注采比不斷變化的問題,提出了基于相滲曲線的油藏注入水利用狀況評價方法。首先,根據(jù)油藏歸一化相滲曲線,確定油藏含水上升規(guī)律描述方程。其次,根據(jù)油藏不同階段實際可采儲量采出程度,采用由歸一化相滲曲線確定的油藏含水上升規(guī)律描述方程,計算對應的理論含水率,再結(jié)合油藏不同階段實際注采比,進而計算油藏不同階段的理論階段存水率和理論階段水驅(qū)指數(shù)偏離量。然后,根據(jù)油藏不同階段實際注采比和實際含水率,計算油藏不同階段的實際階段存水率和實際階段水驅(qū)指數(shù)偏離量,繪制實際(理論)階段存水率和實際(理論)階段水驅(qū)指數(shù)偏離量隨時間的變化曲線。最后,通過對比理論曲線和實際曲線,評價油藏的注入水利用狀況。采用該方法對老君廟L油藏西區(qū)注入水利用狀況進行了評價。結(jié)果表明:1970年以前,注入水利用狀況較差;1970年以后,注入水利用狀況較好。
[Abstract]:Aiming at the problem that the existing evaluation methods of reservoir injection water utilization can not adapt to the changing injection-production ratio in reservoir stage, a reservoir injection water utilization evaluation method based on phase permeability curve is proposed. Firstly, according to the normalized phase permeability curve of the reservoir, the equation of the water cut rising law of the reservoir is determined. Secondly, according to the actual recovery degree of recoverable reserves in different stages of the reservoir, the equation of water cut rising law determined by normalized phase and permeability curve is used to calculate the corresponding theoretical water cut, and combined with the actual injection-production ratio in different stages of the reservoir, Furthermore, the water storage rate in different stages of reservoir and the deviation of water drive index in theoretical stage are calculated. Then, according to the actual injection-production ratio and the actual water cut in different stages of the reservoir, the water storage rate in different stages of the reservoir and the deviation amount of the water drive index in the actual stage are calculated. The curves of water storage rate in actual (theoretical) stage and the deviation of water drive index in practical (theoretical) stage with time are plotted. Finally, the injection water utilization of the reservoir is evaluated by comparing the theoretical curve with the actual curve. This method is used to evaluate the water utilization in the western part of Laojunmiao L reservoir. The results showed that the water use was poor before 1970 and better after 1970.
【作者單位】： 重慶科技學院復雜油氣田勘探開發(fā)重慶市重點實驗室;
【基金】：國家科技重大專項“大型油氣田及煤層氣開發(fā)微尺度滲流數(shù)學模型的建立與分析”(2016ZX05013001-004)資助
【分類號】：TE357.6

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