【摘要】：針對大慶薩中油田聚合物驅(qū)、三元復合驅(qū)規(guī)模不斷擴大,同時水、聚、三元干擾現(xiàn)象日益明顯,由三者引起的地層壓力變化導致地層壓力分布不均、地層存在異常壓力區(qū)等問題也越來越突出。開展如何優(yōu)化調(diào)整區(qū)塊注采壓力系統(tǒng),保持平衡開采,降低水、聚、三元相互干擾的研究尤為重要。本文以薩中開發(fā)區(qū)中區(qū)東部向東區(qū)過渡區(qū)的二類油層聚合物驅(qū)層位(SII10-PII7)和三元復合驅(qū)層位(SII1-SII15+16)為主要研究對象,利用相關(guān)地質(zhì)建模軟件建立儲層精細三維地質(zhì)構(gòu)造模型、沉積相模型以及相控屬性模型,儲量擬合誤差-0.253%。應用油藏數(shù)值模擬軟件對研究區(qū)整體、典型井組及單井的產(chǎn)油量、含水率和壓力進行一體化歷史擬合,其中全區(qū)擬合誤差小于3%,單井擬合誤差均在±3%范圍內(nèi),單井產(chǎn)油擬合符合率達到87.2%,擬合精度較高。同時應用數(shù)值模擬方法研究影響兩驅(qū)地層壓力分布因素,并根據(jù)正交設計結(jié)合壓力干擾指標最終確定影響主控因素;在地層縱向和平面上研究不同時期水-聚、水-三元、聚-三元相互干擾壓力變化特征,結(jié)果表明縱向和平面各時期層間壓力分布不均,產(chǎn)生層間干擾,并且在過渡區(qū)的干擾最為嚴重,壓力變化非常明顯;針對地層壓力分布不均,共提出注入井增注、生產(chǎn)井提液、封堵、壓裂、補孔等5項調(diào)整措施,通過數(shù)值模擬方法對上述調(diào)整措施進行效果評價,針對生產(chǎn)井壓力較低的區(qū)域,可以增加注入井液量;為獲得最佳增油效果,在生產(chǎn)井最佳受效期采取提液措施;封堵主要針對水竄層位;當注入井壓力較高,同時滲透率還較低的情況下可以采用壓裂措施;生產(chǎn)井在某層位壓力較高時,可以對該井在該層位進行補孔操作。通過本文研究,系統(tǒng)總結(jié)形成水、聚、三元同驅(qū)注采壓力系統(tǒng)優(yōu)化調(diào)整技術(shù)方法,并對其它同類油層開發(fā)區(qū)塊的生產(chǎn)實踐具有指導和借鑒意義,具備推廣價值。
[Abstract]:In view of polymer flooding in Daqing Sazhong Oilfield, the scale of ASP flooding is expanding, and the phenomenon of water, aggregation and ternary interference is becoming more and more obvious. The variation of formation pressure caused by these three causes the uneven distribution of formation pressure. The problem of abnormal pressure zone is more and more prominent. It is very important to study how to optimize the pressure system of injection and production in blocks, to maintain balanced mining, to reduce water, aggregation and ternary interference. In this paper, the polymer flooding layer (SII10-PII7) and the ASP flooding layer (SII1-SII15 16) of the second class oil layers in the transition area from the east to the east in the middle and eastern part of the Sazhong Development Zone are taken as the main research objects. The fine 3D geological structure model, sedimentary facies model and facies control attribute model of reservoir are established by using relevant geological modeling software. The reserve fitting error is -0.2533. The oil production, water cut and pressure of the whole, typical well group and single well in the study area are fitted by using the reservoir numerical simulation software. The fitting error of the whole area is less than 3 and the fitting error of the single well is within 鹵3%. The fitting coincidence rate of oil production in single well is 87.2, and the fitting accuracy is high. At the same time, numerical simulation method is used to study the factors affecting the pressure distribution of the two flooding formations, and the main control factors are finally determined according to the orthogonal design combined with the pressure disturbance index. The characteristics of water-accumulation, water-ternary and poly-ternary interferences in different periods are studied in vertical and plane strata. The results show that the pressure distribution between layers is uneven and interlayer interference occurs in different periods. And the interference is the most serious in the transition area, and the pressure change is very obvious. In view of the uneven distribution of formation pressure, five adjustment measures, such as increasing injection in injection wells, fluid extraction in production wells, plugging, fracturing and pore filling, are put forward. The effects of the above adjustment measures are evaluated by numerical simulation, and the low pressure areas of production wells are targeted at the areas where the pressure of production wells is low. The injection fluid can be increased; In order to obtain the best oil increasing effect, the liquid extraction measures should be taken in the optimum effective period of production wells, the plugging is mainly aimed at the water channeling horizon, the fracturing measures can be adopted when the injection well pressure is high and the permeability is low. When the pressure of production well is high, the hole filling operation can be carried out. Through the research in this paper, the paper systematically summarizes the technical methods of optimizing and adjusting the pressure system of formation of water, accumulation, three-element simultaneous flooding and production, and it is of guiding and referential significance to the production practice of other similar oil reservoir development blocks, and has the value of popularization.
【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】：TE357.4
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本文編號：2384241