本文關鍵詞： 儲層特征 儲層壓力分布 壓力調控技術 調整井 效果評價　出處：《東北石油大學》2017年碩士論文　論文類型：學位論文

【摘要】：大慶外圍油田已全面進入加密調整階段,需要進一步完善注采模式提高驅油效率。開發(fā)區(qū)塊基礎井網(wǎng)井間距平均為300米,通過加密調整的方式,井間距縮短為150米。在加密調整井鉆井過程中,鄰近注水井需要關井,而受斷層、儲層低滲及儲層非均質性等因0素影響,在注水期間儲層內部形成異常高壓。面對儲層壓力分布復雜、鉆關井對油田開發(fā)影響較大這一矛盾問題,需要進一步研究注采條件下儲層壓力分布預測技術及安全鉆井技術,建立適合于大慶外圍油田的調整井鉆關方案。通過本文的研究,可提高油田調整井區(qū)塊儲層地層壓力預測精度,降低鉆井施工過程中復雜事故發(fā)生。最終建立適合大慶外圍油田調整井的鉆關標準,適用于低孔低滲儲層環(huán)境,滿足外圍注水開發(fā)油田后期加密調整的需要,降低注水井鉆關給油田開發(fā)帶來的不利影響。本文通過對大慶外圍油田儲層地質概況、礦物特性、儲層孔隙結構、斷層發(fā)育特征及裂縫特征等方面資料的綜合分析,全面掌握研究區(qū)塊的地質特征,進而根據(jù)滲流力學原理、油藏動態(tài)分析、現(xiàn)代試井解釋等方法來建立正常注采條件下的壓力分布理論模型以及改變注采條件的壓力分布理論模型,預測出各層壓力,并與實測壓力進行對比,繪制出壓力分布以及壓力剖面圖。進而對試驗井區(qū)的壓力分布特征以及儲層壓力的影響因素進行系統(tǒng)分析。最終在分析儲層鉆關降壓規(guī)律分析、注水井放溢泄壓規(guī)律的基礎上,形成一套大慶外圍油田調整井鉆井的鉆關標準。研究表明,注采條件下儲層壓力預測技術適用于外圍低滲儲層非均質條件下不同遮擋條件下地層壓力預測,用于指導鉆關方案制定及儲層壓力調控;注水井放溢泄壓調控技術應用可以有效降低注采不平衡區(qū)、斷層遮擋井區(qū)儲層壓力,減少鉆井復雜事故發(fā)生,降低鉆井成本。但對于裂縫高壓體調控效果差;大慶外圍油田調整井鉆井的鉆關標準,適用于低孔低滲儲層環(huán)境,滿足外圍注水開發(fā)油田后期加密調整的需要。
[Abstract]:Daqing Peripheral Oilfield has entered the stage of infilling adjustment, it is necessary to further improve the injection-production model to improve the oil displacement efficiency. The average spacing between the basic wells and wells in the development block is 300 meters, through infilling adjustment. The interval between wells is shortened to 150 meters. In the drilling process of infill adjustment wells, the adjacent water injection wells need to be shut down, which is affected by factors such as fault, reservoir low permeability and reservoir heterogeneity. During water injection, abnormal high pressure is formed in the reservoir. In the face of complex distribution of reservoir pressure, drilling and shut-in has a great impact on oilfield development. It is necessary to further study the prediction technology of reservoir pressure distribution and safety drilling technology under injection-production conditions, and establish the drilling and closing scheme of adjustment wells suitable for Yu Daqing peripheral oil fields. It can improve the prediction accuracy of reservoir formation pressure in adjustment well block of oil field, reduce the complex accident in drilling operation process, and finally establish the drilling and closing standard suitable for adjustment well in peripheral oil field of Daqing, which is suitable for low porosity and low permeability reservoir environment. To meet the needs of later infilling adjustment in peripheral waterflooding oilfield and to reduce the adverse effects of drilling and closing of injection wells on oilfield development, this paper analyzes the geological situation, mineral characteristics and pore structure of reservoir in Daqing peripheral oilfield. Comprehensive analysis of fault development characteristics and fracture characteristics, comprehensive grasp of the geological characteristics of the block, and then according to the principle of percolation mechanics, reservoir dynamic analysis. Modern well test interpretation and other methods are used to establish the theoretical model of pressure distribution under normal injection and production conditions and the theoretical model of pressure distribution to change the conditions of injection and production. The pressure of each layer is predicted and compared with the measured pressure. The pressure distribution and pressure profile are drawn, and then the pressure distribution characteristics and reservoir pressure influencing factors in test well area are analyzed systematically. Finally, the analysis of reservoir drilling-off and pressure-lowering law is carried out. A set of drilling and closing standards for adjustment wells in Daqing peripheral oil field are formed on the basis of the rule of discharge and pressure relief of water injection wells. Reservoir pressure prediction technology under injection-production condition is suitable for formation pressure prediction under different occlusion conditions under heterogeneous condition of peripheral low permeability reservoir, which can be used to guide drilling scheme formulation and reservoir pressure control. The application of water injection well overflow and pressure release control technology can effectively reduce the reservoir pressure in the injection-production imbalance area, the fault shading area, reduce the occurrence of complex drilling accidents and reduce drilling cost, but the control effect on the fractured high pressure body is poor. The drilling standard of adjustment well in Daqing peripheral oilfield is suitable for low porosity and low permeability reservoir environment and meets the need of infilling adjustment in peripheral waterflooding oilfield.
【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】：TE28;P618.13
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本文編號：1446851