發(fā)布時(shí)間：2018-04-10 20:45

  本文選題：長6 + 低滲透��； 參考：《西安石油大學(xué)》2015年碩士論文

【摘要】：吳起油田寨子河區(qū)位于鄂爾多斯盆地陜北斜坡(伊陜斜坡)西部中段,主力層長6儲層是典型的特低滲砂巖巖性油藏,地質(zhì)條件普遍以致密、特低滲、低孔、低壓、低含油飽和度的長石質(zhì)細(xì)～粉砂巖為主要特征,鉆穿油層后基本沒有自然產(chǎn)量,只有壓裂改造后才具有工業(yè)開采價(jià)值,單井產(chǎn)量遞減快。寨子河區(qū)自投入注水開發(fā)后,主力長6油層地層能量在一定程度上得以有效補(bǔ)充,但同時(shí)表現(xiàn)出隨著地層虧空的加大,地層壓力保持水平不斷下降,產(chǎn)油自然遞減速度加大,產(chǎn)油水平難以保持等,影響油田開發(fā)效果與開發(fā)水平。本論文采用油藏工程研究技術(shù)、產(chǎn)吸剖面分析技術(shù)及油藏動態(tài)分析技術(shù),對長6油層注水開發(fā)進(jìn)行效果評價(jià)。通過利用該區(qū)油藏靜態(tài)資料研究成果,明確了油層產(chǎn)量、壓力和含水率變化規(guī)律,明確了油層吸水能力及注采平衡狀況,油水分布及水線推進(jìn)狀況、儲量動用及潛力分布狀況等,針對低滲透油田開發(fā)中存在問題提出了調(diào)整注采井網(wǎng)、完善注采對應(yīng)關(guān)系、調(diào)整注采壓力系統(tǒng)等一系列開發(fā)調(diào)整方案,并形成了一套低滲透油層注水開發(fā)評價(jià)的方法體系,為深入掌握長6低滲透油藏注水開發(fā)效果提供參考具有積極的指導(dǎo)意義,同時(shí)為提高吳起油田開發(fā)效果,確保其長期持續(xù)穩(wěn)定發(fā)展提供有效的技術(shù)思路或技術(shù)體系。
[Abstract]:The Zhaizi River area of Wuqi Oilfield is located in the middle section of the western part of the northern Shaanxi slope (Yishan slope) in the Ordos Basin. The main reservoir Chang 6 is a typical reservoir with extremely low permeability sandstone lithology. The geological conditions are generally dense, extremely low permeability, low porosity and low pressure.The feldspathic fine siltstone with low oil saturation is the main feature. There is no natural production after drilling through the reservoir. Only after fracturing and revamping has the industrial exploitation value and the single well production decreases rapidly.Since the Zhaizihe area was put into water injection development, the formation energy of the main Chang 6 reservoir has been effectively replenished to a certain extent, but at the same time it has shown that with the increase of formation deficit, the level of formation pressure keeps decreasing and the natural decline rate of oil production increases.The oil production level is difficult to be maintained, which affects the development effect and development level of oil field.In this paper, reservoir engineering research technology, production and absorption profile analysis technology and reservoir dynamic analysis technology are used to evaluate the effect of water injection in Chang6 reservoir.By using the research results of static reservoir data in this area, the variation law of reservoir production, pressure and water cut, the water absorption capacity and injection-production balance, the distribution of oil and water and the advance of waterline are determined.In view of the problems existing in the development of low permeability oil fields, a series of development adjustment schemes, such as adjusting injection-production pattern, perfecting the corresponding relationship between injection and production and adjusting the injection-production pressure system, are put forward.A set of method system for water injection evaluation of low permeability reservoir is formed, which provides a reference for further mastering the effect of water injection in Chang6 low permeability reservoir, and improves the development effect of Wuqi oilfield at the same time.Ensure its long-term sustainable and stable development to provide an effective technical thinking or technical system.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.6

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本文編號：1732840