J油田堵水調(diào)剖措施效果評價
發(fā)布時間：2018-11-02 07:55
【摘要】：J油田目標區(qū)塊進入中高含水開發(fā)期,水驅效率降低,平面矛盾加劇。為提高采收率,緩解平面矛盾,堵水調(diào)剖措施成為主要應對方法之一。本文根據(jù)低滲透裂縫性油藏特點,通過理論計算和室內(nèi)實驗資料、礦場動靜態(tài)資料以及測試資料的系統(tǒng)分析總結,深入研究了J油田目標區(qū)塊含水、產(chǎn)量等指標變化規(guī)律,預測了各項指標變化趨勢。通過堵水調(diào)剖措施前后指標的對比,研究了堵水調(diào)剖對控制含水上升速度、產(chǎn)量遞減速度的作用,測算了研究區(qū)措施增油量、降水量和有效期,評價了堵水調(diào)剖礦場試驗技術效果。通過研究區(qū)各調(diào)剖井組之間開發(fā)效果的對比,研究了油層滲透率、非均質性、調(diào)剖前含水、注入調(diào)剖體系等多項因素對調(diào)剖效果的影響。采用統(tǒng)計回歸分析方法,定量研究了調(diào)剖效果與各項影響因素間的關系,建立了調(diào)剖增油量與影響因素間關系圖版。研究結果表明,J油田目標區(qū)塊含水上升規(guī)律具有典型的低滲透裂縫性油藏的特征,含水上升模式分裂縫性、裂縫-孔隙性和孔隙性三種類型。區(qū)塊整體含水上升模式表現(xiàn)為裂縫-孔隙性見水特征,中低含水期含水上升速度快、高含水期后含水上升速度有所減緩,目前處于含水快速上升階段。目標區(qū)塊不同類型見水井組在堵水調(diào)剖措施后都見到了一定的降水和增油效果。34個調(diào)剖井組措施后平均單井組累計降水量2076.37m3,含水上升率降低0.77個百分點;目標區(qū)塊水驅產(chǎn)量遞減規(guī)律為雙曲遞減類型,34個調(diào)剖井組措施后平均單井組累計增油量784.29t,有效期19個月。堵水調(diào)剖效果的重要影響因素包括措施時機、注入體系以及油層滲透率、厚度、裂縫發(fā)育情況。根據(jù)堵水調(diào)剖措施影響因素量化研究計算結果,措施前含水和含水非均勻系數(shù)對措施增油幅度影響最大,油層滲透率和厚度對措施增油幅度的影響相對較小。J油田實施堵水調(diào)剖技術,在選區(qū)選井方面,油層厚度大、滲透率高以及平面矛盾突出的區(qū)域措施效果更好;在見水類型方面,孔隙性見水井組措施效果更好;在措施時機方面,中含水期(含水60%以下)以前措施效果更好;在選擇調(diào)剖體系方面,以締合物凝膠+預交聯(lián)顆粒+無機凝膠+復合堵劑和弱凝膠+顆粒+無機體系+封口劑效果更好。通過研究,形成了一套以產(chǎn)油量、含水為主要評價指標的礦場試驗效果評價方法,通過水驅無措施條件下各項指標變化規(guī)律的研究,對比堵水調(diào)剖礦場實際開發(fā)指標變化特點,測算了堵水調(diào)剖措施增油量、降水量。各項指標測算方法從特低滲透油田滲流機理出發(fā)、理論分析與油田開發(fā)實踐有機結合,具有較高的應用價值。
[Abstract]:When the target block of J oilfield enters the stage of middle and high water cut, the efficiency of water drive decreases and the plane contradiction intensifies. In order to improve oil recovery and alleviate plane contradiction, water plugging and profile control measures have become one of the main countermeasures. According to the characteristics of low permeability fractured reservoir, through the systematic analysis and summary of theoretical calculation, laboratory experimental data, field dynamic and static data and test data, the variation law of water cut and production rate in target block of J Oilfield is studied in depth. The change trend of each index is forecasted. By comparing the indexes before and after the water shutoff and profile control measures, the effects of water shutoff profile control on the control of water cut rising speed and production decline rate are studied, and the oil increment, precipitation and validity period of the measures in the study area are calculated. The technical effect of profile control and profile control for water plugging was evaluated. Based on the comparison of development effects among different profile control wells in the study area, the effects of reservoir permeability, heterogeneity, water cut before profile control and injection profile control system on profile control were studied. By means of statistical regression analysis, the relationship between profile control effect and influencing factors was studied quantitatively, and the relationship chart between profile control oil quantity and influencing factors was established. The research results show that the water cut rising law of target block in J oilfield has the characteristics of typical low permeability fractured reservoir, and the water cut rising pattern is divided into three types: fracture, fracture-porosity and porosity. The whole water cut rising pattern of the block shows the characteristics of fracture and porosity, the water cut rising speed is fast in the middle and low water cut period, the water cut rising speed is slowed down after the high water cut period, and it is in the water cut fast rising stage at present. The effect of water shutoff and profile control measures on water shutoff and profile control has been observed in different types of wells in target blocks. After 34 profile control measures, the average cumulative precipitation of single well group is 2076.37 m3, and the water cut rise rate is reduced by 0.77%. The decline rule of water drive production in target block is hyperbolic decline type. After 34 profile control well groups, the cumulative oil increment of single well group is 784.29 t, and the validity period is 19 months. The important factors influencing the effect of water plugging and profile control include the timing of measures, injection system, permeability, thickness and fracture development of reservoir. According to the results of quantitative study on the influencing factors of water shutoff and profile control measures, the water cut and non-uniform coefficient of water cut before the measures have the greatest influence on the oil increasing amplitude of the measures. The effect of reservoir permeability and thickness on the oil increase amplitude is relatively small. In J Oilfield, the regional measures with large reservoir thickness, high permeability and prominent plane contradiction are better in selecting wells by water plugging and profile control. In terms of the type of water appearing, the effect of the measures of the porosity well group is better, and the effect of the measures before the middle water cut period (less than 60% of the water cut) is better than that of the other measures. In the selection of profile control system, the composite plugging agent of association gel pre-crosslinked particle inorganic gel and the sealing agent of weak gel particle inorganic system are better. Through the research, a set of evaluation method of field test effect is formed, which takes oil production and water cut as the main evaluation index. Through the study of the change law of each index under the condition of no measure of water flooding, the characteristics of actual development indexes of water plugging and profile control field are compared. The oil increase and precipitation of profile control measures for water shutoff are calculated. Based on the percolation mechanism of ultralow permeability oil field and the combination of theoretical analysis and oilfield development practice, each index calculation method has high application value.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE358.3
本文編號：2305407
[Abstract]:When the target block of J oilfield enters the stage of middle and high water cut, the efficiency of water drive decreases and the plane contradiction intensifies. In order to improve oil recovery and alleviate plane contradiction, water plugging and profile control measures have become one of the main countermeasures. According to the characteristics of low permeability fractured reservoir, through the systematic analysis and summary of theoretical calculation, laboratory experimental data, field dynamic and static data and test data, the variation law of water cut and production rate in target block of J Oilfield is studied in depth. The change trend of each index is forecasted. By comparing the indexes before and after the water shutoff and profile control measures, the effects of water shutoff profile control on the control of water cut rising speed and production decline rate are studied, and the oil increment, precipitation and validity period of the measures in the study area are calculated. The technical effect of profile control and profile control for water plugging was evaluated. Based on the comparison of development effects among different profile control wells in the study area, the effects of reservoir permeability, heterogeneity, water cut before profile control and injection profile control system on profile control were studied. By means of statistical regression analysis, the relationship between profile control effect and influencing factors was studied quantitatively, and the relationship chart between profile control oil quantity and influencing factors was established. The research results show that the water cut rising law of target block in J oilfield has the characteristics of typical low permeability fractured reservoir, and the water cut rising pattern is divided into three types: fracture, fracture-porosity and porosity. The whole water cut rising pattern of the block shows the characteristics of fracture and porosity, the water cut rising speed is fast in the middle and low water cut period, the water cut rising speed is slowed down after the high water cut period, and it is in the water cut fast rising stage at present. The effect of water shutoff and profile control measures on water shutoff and profile control has been observed in different types of wells in target blocks. After 34 profile control measures, the average cumulative precipitation of single well group is 2076.37 m3, and the water cut rise rate is reduced by 0.77%. The decline rule of water drive production in target block is hyperbolic decline type. After 34 profile control well groups, the cumulative oil increment of single well group is 784.29 t, and the validity period is 19 months. The important factors influencing the effect of water plugging and profile control include the timing of measures, injection system, permeability, thickness and fracture development of reservoir. According to the results of quantitative study on the influencing factors of water shutoff and profile control measures, the water cut and non-uniform coefficient of water cut before the measures have the greatest influence on the oil increasing amplitude of the measures. The effect of reservoir permeability and thickness on the oil increase amplitude is relatively small. In J Oilfield, the regional measures with large reservoir thickness, high permeability and prominent plane contradiction are better in selecting wells by water plugging and profile control. In terms of the type of water appearing, the effect of the measures of the porosity well group is better, and the effect of the measures before the middle water cut period (less than 60% of the water cut) is better than that of the other measures. In the selection of profile control system, the composite plugging agent of association gel pre-crosslinked particle inorganic gel and the sealing agent of weak gel particle inorganic system are better. Through the research, a set of evaluation method of field test effect is formed, which takes oil production and water cut as the main evaluation index. Through the study of the change law of each index under the condition of no measure of water flooding, the characteristics of actual development indexes of water plugging and profile control field are compared. The oil increase and precipitation of profile control measures for water shutoff are calculated. Based on the percolation mechanism of ultralow permeability oil field and the combination of theoretical analysis and oilfield development practice, each index calculation method has high application value.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE358.3
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