本文選題：異常高壓　切入點：低滲透　出處：《西南石油大學》2015年碩士論文　論文類型：學位論文

【摘要】：異常高壓低滲透復雜斷塊油藏作為低滲透油藏的一種特殊類型,除具有常規(guī)油藏的特征之外,還具有應力敏感性強、存在啟動壓力梯度、儲層物性差,非均質性嚴重,油藏邊界類型復雜等特點。正確認識該類油藏的滲流機理和開發(fā)特征,制定合理的開發(fā)方案,對于高效開發(fā)該類油藏具有重要的指導意義。 本文針對K1g3油藏目前注水開發(fā)動態(tài)中表現(xiàn)出的地層壓力下降快、油井壓力和產(chǎn)量下降快,水井注水壓力高,日注水量低等問題,主要開展了以下幾方面研究并取得了相應的成果： (1)K1g3油藏基本地質及開發(fā)特征再認識。利用油藏地質特征研究的報告、各種靜態(tài)地質研究成果與測井解釋結果等資料,運用沉積學與石油地質學的理論與方法開展地質特征再認識研究；利用油藏各種生產(chǎn)動態(tài)資料,總結歸納了目前開發(fā)過程所面臨的問題。 (2)流體滲流機理實驗研究。開展了①滲流啟動壓力梯度實驗,得到了流度與滲流啟動壓力梯度的關系式。②應力敏感實驗,得到了滲透率與有效應力的表達式。③滲透率級差與注采壓差關系實驗,得到了滲透率級差與高低滲透巖心流量比的曲線圖。④注入水體系實驗研究,得到了最優(yōu)注入水體系。 (3)注水井吸水能力及提高吸水能力措施研究。利用現(xiàn)有注水井資料進行注水井動態(tài)分析,總結分析了注水開發(fā)過程中出現(xiàn)的問題及難點,并提出了相應的改善措施。 (4)應用油藏工程理論與方法,結合流體滲流機理實驗研究結果,開展了油藏有效注水開發(fā)技術政策研究。①開展了合理注采井網(wǎng)井距研究,建立了考慮啟動壓力梯度和應力敏感的極限注采井距計算方法,得到了相應圖版。②利用復雜斷塊油藏面積波及效率計算方法,得到了K1g3油藏各區(qū)塊目前面積波及效率。③建立了滲透率級差對高低滲透層吸水能力影響的分析理論,并計算得到了注水井的縱向波及效率。④開展了合理注采壓力系統(tǒng)研究,確定了油水井合理井底流壓和油藏合理地層壓力保持水平及轉注時機。⑤推導了考慮應力敏感時油井產(chǎn)能公式,研究了不同地層壓力保持水平對油井產(chǎn)能的影響規(guī)律,得到了相應圖版。⑥分析評價了K1g3油藏各區(qū)塊目前注采壓力系統(tǒng)。
[Abstract]:As a special type of low permeability reservoir, abnormal high pressure and low permeability complex fault block reservoir is characterized by stress sensitivity, start-up pressure gradient, poor physical property and serious heterogeneity. Understanding the percolation mechanism and development characteristics of this kind of reservoir correctly and making a reasonable development plan have important guiding significance for the efficient development of this kind of reservoir. In this paper, the formation pressure, oil well pressure and production rate, water injection pressure and daily water injection rate of K1g3 reservoir are decreased rapidly, and the water injection pressure is high, and the daily water injection rate is low, etc, in view of the present water injection performance of K1g3 reservoir. Mainly carried out the following aspects of research and achieved corresponding results:. The basic geological and development characteristics of the K1g3 reservoir are rerecognized. The data of various static geological research results and log interpretation results are used in the study of reservoir geological characteristics. By using the theory and method of sedimentology and petroleum geology, the geological characteristics are studied again, and the problems in the development process are summarized by using the various production dynamic data of the reservoir. 2) Experimental study of fluid flow mechanism. 1. The stress sensitivity experiment of the relationship between fluid mobility and starting pressure gradient is obtained. The expression of permeability and effective stress is obtained. 3. The relationship between permeability differential and injection-production pressure difference is obtained. The experimental study on injection water system of curve .4 between permeability differential and flow ratio of high and low permeability core is obtained, and the optimal injection water system is obtained. Based on the existing data of water injection wells, the problems and difficulties in the process of water injection development are summarized and analyzed, and the corresponding improvement measures are put forward. 4) applying reservoir engineering theory and method, combining with the experimental results of fluid percolation mechanism, the effective water injection development technical policy of reservoir is studied. 1. The reasonable well spacing of injection-production well is studied. The calculation method of limit injection-production distance considering starting pressure gradient and stress sensitivity is established, and the method of calculating area sweep efficiency of complex fault block reservoir using the corresponding chart .2 is obtained. The present area sweep efficiency of each block of K1g3 reservoir is obtained. 3. The analysis theory of the influence of permeability differential on the water absorption capacity of high and low permeability layer is established, and the longitudinal sweep efficiency of water injection well is calculated. 4. The reasonable injection-production pressure system is studied. The reasonable bottom hole flow pressure and reasonable reservoir formation pressure maintenance level in oil and water wells are determined. The oil well productivity formula considering stress sensitivity is derived, and the influence of different formation pressure maintenance levels on oil well productivity is studied. The corresponding chart .6 is obtained to analyze and evaluate the current injection-production pressure system in each block of K1g3 reservoir.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE357.6

【參考文獻】

相關期刊論文 前10條

1 陳榮芹;;復雜斷塊油藏細分注水開發(fā)方案優(yōu)化研究[J];斷塊油氣田;2006年01期

2 肖曾利;蒲春生;秦文龍;;低滲砂巖油藏壓力敏感性實驗[J];斷塊油氣田;2008年02期

3 路永萍;王學立;范衛(wèi)紅;吳金鳳;王賀強;李紅敏;李小園;王海霞;賀紹娟;;超小井距在復雜斷塊油藏后期注水開發(fā)中的應用[J];斷塊油氣田;2010年05期

4 屈亞光;劉月田;汪國輝;周光林;;高尚堡復雜斷塊油藏合理開發(fā)層系研究[J];斷塊油氣田;2010年06期

5 徐冬梅;;異常高壓低滲透油藏注水優(yōu)化分析——以史南油田史深100區(qū)塊為例[J];斷塊油氣田;2012年03期

6 苗錢友;李云娟;;應力敏感油藏合理工作制度的確定[J];大慶石油學院學報;2005年06期

7 張強;王永清;楊玲智;蔣睿;;考慮啟動壓力和二次梯度的應力敏感油藏穩(wěn)定滲流模型[J];大慶石油學院學報;2011年05期

8 王瑞飛;段雨安;呂新華;鄧瑞健;;深層高壓低滲砂巖油藏應力敏感性實驗[J];地質科技情報;2014年01期

9 崔太華,劉海濤,馮士杰,辛松,李少兵,高萬州;橋口油田非均質復雜斷塊油田提高采收率技術研究[J];海洋石油;2005年02期

10 尹尚先;王尚旭;;不同尺度下巖層滲透性與地應力的關系及機理[J];中國科學.D輯:地球科學;2006年05期

，

本文編號：1602295