【摘要】：L油田在開發(fā)過程存在油井水淹嚴重、注入水錐進方向不均一,水驅(qū)波及系數(shù)較低,這些問題的存在,造成部分油井開始投產(chǎn)就見水,油井產(chǎn)量低和產(chǎn)能低,油井的產(chǎn)量下降。為了抑制含水上升,減緩產(chǎn)量遞減,迫切需要對地區(qū)的油藏進行深入研究,找出水淹與儲層關(guān)系,建立L油田水淹層的定性識別方法、定量解釋標準以及水淹錐進方式與儲層關(guān)系的判別模式,進而對新開發(fā)井儲層的水淹狀況進行快速判斷。找出油藏水淹的規(guī)律以及剩余油分布特性,預(yù)測剩余油富集區(qū),為調(diào)剖堵水、提高采收率、調(diào)整油藏的開發(fā)方案等提供依據(jù)。目前國內(nèi)外對砂泥巖水淹層測井解釋研究很多,而在碳酸鹽巖水淹層測井解釋方面還沒有一套完整的方法體系。此外,相比砂泥巖水淹層測井解釋,碳酸鹽巖水淹層測井解釋需要考慮到裂縫對水淹規(guī)律及剩余油分布的影響。以L油田為研究對象,以水淹層測井解釋為核心,結(jié)合碳酸鹽巖特性,同時考慮裂縫在水淹過程的影響,從測井角度建立了碳酸鹽巖水淹層解釋的系統(tǒng)研究方法,為有效地進行高含水階段剩余油分布預(yù)測探索了一條新途徑。由于少量微裂縫的對滲流的影響,在含中低水淹時期,含水上升非�？�。在對取心井資料分析發(fā)現(xiàn),L油田在研究層段以孔隙型儲層為主,發(fā)育少量微裂縫,因此,首先針對孔隙型儲層運用定性、定量方法進行解釋。①定性方法：結(jié)合生產(chǎn)動態(tài)資料分析測井資料,準確提取水淹層測井響應(yīng)特征,制作定性模版來劃分水淹層；通過反演原始地層電阻率及原始地層含油飽和度定性識別水淹層。②定量方法：通過計算三飽和度,建立含水率與驅(qū)油效率模型,定量劃分水演級別,運用以上方法能有效識別水淹層。其次,在發(fā)育微裂縫的地方采用定性對比的方法進行水淹解釋,分析取心井成像資料,總結(jié)出了裂縫發(fā)育段的常規(guī)測井響應(yīng)特征,能有效識別出微裂縫發(fā)育層段,對這些層段通過井間對比達到定性識別水淹層的目的。結(jié)合以上所有方法,對水淹層具有很強的識別效果,達到要求的解釋符合率,可以廣泛應(yīng)用于生產(chǎn)。
[Abstract]:The water flooding of oil well in L oilfield is serious, the direction of injection water coning is not uniform, and the sweep efficiency of water drive is low. These problems cause some oil wells to come into production and see water, the production and productivity of oil well are low, and the production of oil well is decreased. In order to restrain the rise of water cut and slow down the decline of production, it is urgent to deeply study the reservoir in the area, find out the relationship between water flooding and reservoir, and establish the qualitative identification method of water flooded zone in L oilfield. The standard of quantitative interpretation and the discriminant model of the relationship between the water-flooded coning mode and the reservoir can be used to judge the water-out status of the newly developed wells quickly. The rule of water flooding in reservoir and the distribution characteristics of remaining oil are found out, and the remaining oil enrichment area is predicted, which provides the basis for profile control and water plugging, improvement of oil recovery, adjustment of reservoir development plan and so on. At present, there are a lot of researches on logging interpretation of sand-mudstone watered-out zone at home and abroad, but there is no complete method system for logging interpretation of carbonate-rock watered-out zone. In addition, compared with logging interpretation of sand-mudstone water-flooded zone, the influence of fractures on water-flooded rule and remaining oil distribution should be considered in log interpretation of carbonate water-flooded zone. Taking L oilfield as the research object, taking logging interpretation of waterflooded zone as the core, combining the characteristics of carbonate rock and considering the influence of fracture in waterflooded process, the systematic research method of water flooded zone interpretation of carbonate rock is established from the logging point of view. In order to effectively predict the residual oil distribution in high water cut stage, a new approach has been explored. Due to the influence of a small amount of micro-cracks on seepage, the water-cut rises very quickly during the middle-low flooding period. Based on the analysis of coring well data, it is found that pore-type reservoir is the main reservoir in L oilfield, and a few micro-fractures are developed. Therefore, the qualitative analysis of pore-type reservoir is firstly carried out. Quantitative method for interpretation. 1 qualitative methods: combined with production performance data analysis logging data, accurate extraction of logging response characteristics of water-flooded zones, making qualitative templates to divide water-flooded zones; Water flooded zone is identified qualitatively by inversion of original formation resistivity and original formation oil saturation. 2 quantitative method: by calculating triple saturation, a model of water cut and oil displacement efficiency is established, and water modeling level is quantitatively divided. The above methods can be used to identify water flooded zones effectively. Secondly, the water flooding interpretation is carried out by qualitative comparison where micro-fractures are developed, and the imaging data of coring wells are analyzed, and the conventional logging response characteristics of the fracture development section are summarized, which can effectively identify the micro-fracture development zone. Through the cross-well correlation, the water-flooded zone can be identified qualitatively. Combined with all the above methods, it can be widely used in production because it has a strong recognition effect on waterflooded zones and meets the required concordance rate of interpretation.
【學(xué)位授予單位】：長江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.81

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本文編號：2462497