【摘要】：合理的壓力監(jiān)測系統(tǒng)是進行油田動態(tài)監(jiān)測、動態(tài)分析、制定科學的開發(fā)調(diào)整方案的基礎,因此對壓力監(jiān)測系統(tǒng)優(yōu)化方法進行系統(tǒng)的研究必不可少。大慶外圍Y區(qū)塊油田自投入開發(fā)以來的測壓資料表明,有大部分的壓力恢復試井資料不出徑向流直線段,解釋結果多解性強,使得開發(fā)人員無法獲得準確的地層信息,嚴重影響了資料利用率;同時目前油田存在大量斜井、水平井,這些井缺乏相應的監(jiān)測技術。為此,本文開展了Y區(qū)塊油田壓力監(jiān)測系統(tǒng)優(yōu)化研究,有效掌握Y區(qū)塊油田的地層壓力動態(tài)信息,為油田開發(fā)及方案制定提供依據(jù),無疑具有重大的意義。本文通過針對未出徑向流動段的井和恢復測壓的井,以油藏實際測壓數(shù)據(jù)統(tǒng)計規(guī)律和滲流力學基本理論為依據(jù),利用Honer方法和MDH方法求取地層壓力基本原理,對現(xiàn)有的數(shù)理統(tǒng)計方法、面積加權平均、體積加權平均、井間壓力分布等地層壓力求取的適應性和準確性進行了研究,給出了地層壓力計算方法,并優(yōu)選壓力時間乘積法和MDH法這兩種方法。根據(jù)歷史測壓資料成果,對不同解釋成果進行了歸類。其中出現(xiàn)徑向流動段的井,分析了進一步優(yōu)化測壓時間潛力,給出了測壓時間范圍;未出現(xiàn)徑向流動段的井,分析了原因,通過測壓時間優(yōu)化,給出了合理測壓時間范圍,盡可能測取到徑向流動段;對于測靜壓和恢復測壓的井,也優(yōu)化了測壓時間,給出了測壓時間范圍。駝峰型、徑向流型和上翹型的關井時間范圍分別為180h-749h,205h-240h,93h-240h。分析了各種測壓方式下地層壓力的處理與計算,針對Y區(qū)塊的不同工作制度井,結合各種測壓方法的優(yōu)缺點,提出了相應工作制度井的最佳測壓方式:正常抽油井采用偏心測壓和液面恢復測壓;間抽井采用液面恢復測壓;長關井和撈油井采用測靜壓點,為監(jiān)測井點的測壓方式選取提供了參考。根據(jù)油田的地質(zhì)特征和動態(tài)特征,結合測壓歷史數(shù)據(jù),分析了影響油田地層壓力主要因素,研究了油田不同開發(fā)階段地層壓力保持水平。研究獲得了綜合考慮影響因素下的合理地層壓力保持水平的計算方法,以含水率為參考,計算了 Y區(qū)塊合理地層壓力保持水平。這些研究性成果的取得,為Y區(qū)塊進一步的油田開發(fā)提供了依據(jù),對Y區(qū)塊的開發(fā)無疑具有及其重大的意義。
[Abstract]:Reasonable pressure monitoring system is the basis of dynamic monitoring, dynamic analysis and scientific development adjustment scheme, so it is necessary to study the optimization method of pressure monitoring system systematically. The pressure measurement data of Y block oil field in the periphery of Daqing since it was put into development show that most of the pressure recovery test data can not produce radial flow straight section, and the interpretation result is multi-solution, which makes it impossible for developers to obtain accurate formation information. Seriously affected the utilization rate of information; At the same time, there are a large number of inclined wells and horizontal wells in the oil field, these wells lack the corresponding monitoring technology. Therefore, this paper has carried out the optimization research of the pressure monitoring system in the Y block oilfield, effectively grasped the formation pressure dynamic information of the Y block oilfield, and provided the basis for the oilfield development and the plan formulation, which is undoubtedly of great significance. In this paper, the basic principles of formation pressure are obtained by means of Honer method and MDH method, based on the statistical law of reservoir actual pressure measurement data and the basic theory of percolation mechanics. The adaptability and accuracy of existing mathematical statistical methods, area weighted average, volume weighted average, cross-well pressure distribution and other formation pressure calculation methods are studied, and the calculation method of formation pressure is given. The pressure time product method and the MDH method are also selected. According to the results of historical pressure measurement, different interpretation results are classified. The potential of further optimizing pressure measurement time is analyzed, and the time range of pressure measurement is given. The causes of the wells without radial flow section are analyzed, and the reasonable pressure measurement time range is given by optimizing the pressure measurement time, and the radial flow section is measured as far as possible. For the wells with static pressure and recovery pressure, the pressure measuring time is optimized, and the pressure measuring time range is given. The closing time ranges of hump type, radial flow pattern and upwarping type are 180h-749h / 205h-240hU 93h-240h respectively. This paper analyzes the treatment and calculation of formation pressure under various pressure measurement methods, and combines the advantages and disadvantages of various pressure measuring methods for different working system wells in Y block. The best pressure measurement method of the corresponding working system well is put forward: the normal pumping well adopts eccentric pressure measurement and liquid level recovery pressure measurement; In the interval pumping well, the liquid level is used to recover the pressure measurement, and the static pressure point is used in the long shut-in well and the salvage well, which provides a reference for the selection of the pressure measuring method for the monitoring well point. According to the geological and dynamic characteristics of the oil field, combined with the historical data of pressure measurement, the main factors affecting the formation pressure in the oilfield are analyzed, and the level of formation pressure maintenance in different development stages of the oilfield is studied. The reasonable formation pressure maintenance level of Y block is calculated by taking water cut as reference. The achievement of these research achievements provides the basis for further oilfield development in block Y, and undoubtedly has great significance for the development of block Y.
【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】：TE331

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本文編號：2423505