本文選題：薄差層 + 剩余油��； 參考：《東北石油大學》2015年碩士論文

【摘要】：目前,國內大多數油田都已進入高含水期甚至特高含水期開發(fā)階段,而采出程度相對較低,大量的剩余油還存在于地下,剩余油挖潛的潛力還很大。杏四~六面積北塊非主力油層綜合含水率達到93.75%,已進入特高含水期,薄差層成為水驅開發(fā)的主要對象。因此,為保證油田長期穩(wěn)產,確保長遠的經濟及社會效益,需對薄差層提高采收率進行研究,對區(qū)塊層系細化、注采開發(fā)、井網方式進行調整,并采取有效措施,優(yōu)化注采系統(tǒng),設計措施方案,形成薄差層綜合評價技術及挖潛技術,有效動用薄差儲層剩余油。本文在詳細了解區(qū)塊地質特點和儲層特性的基礎上,利用現場所給的靜態(tài)地質數據建立了區(qū)域地質模型,考慮到計算機的計算能力,對地質模型進行了粗化。然后,根據現場提供的開發(fā)動態(tài)數據進行了歷史擬合,擬合的主要指標包括:產液量、含水率和采出程度,擬合滿足精度3%。根據數值模擬結果,分析薄差儲層剩余油分布狀況,確定剩余油類型,通過量化各類油層的剩余油分布,研究加密調整潛力和挖潛措施,制定布井方案,并從開發(fā)效果和經濟效益兩方面優(yōu)選布井方案。優(yōu)選結果顯示:薄差儲層分三套層系開采,即薩爾圖好層、薩爾圖差層和葡Ⅰ4組及以下油層,含水率下降了2.84%,采收率提高了5.05%,明顯提高了水驅開發(fā)效果。所得成果為改善薄差儲層動用程度提供借鑒。
[Abstract]:At present, most oil fields in China have entered the development stage of high water cut period or even very high water cut stage, but the degree of recovery is relatively low, a large number of remaining oil still exist in the underground, and the potential of remaining oil is still very great.The comprehensive water cut of non-main reservoirs in the North Block of Apricot 4 ~ 6 has reached 93.75%, which has entered the period of extremely high water cut, and thin and poor layers have become the main object of water drive development.Therefore, in order to ensure long-term stable production of oil fields and ensure long-term economic and social benefits, it is necessary to study the improvement of recovery factor of thin and differential layers, refine the layer system of blocks, develop injection-production, adjust the pattern of well pattern, and take effective measures.Optimization of injection-production system, design of measures, formation of comprehensive evaluation technology of thin and differential layer and tapping technology, effective use of remaining oil in thin difference reservoir.Based on the detailed understanding of the geological characteristics and reservoir characteristics of the block, a regional geological model is established by using the static geological data given in the field. Considering the computing ability of the computer, the geological model is coarsened.Then, according to the development dynamic data provided by the field, the historical fitting is carried out. The main indexes of the fitting include: liquid yield, water content and extraction degree, and the fitting meets the accuracy of 3.According to the results of numerical simulation, the distribution of remaining oil in thin difference reservoir is analyzed, and the type of remaining oil is determined. By quantifying the distribution of remaining oil in all kinds of reservoirs, the potentiality of infilling adjustment and tapping potential are studied, and the plan of well layout is worked out.And from the development effect and economic benefit two aspects of optimal selection of well layout scheme.The optimal selection results show that the thin and poor reservoir is divided into three sets of production systems, that is, the good layer of Saltu, the poor layer of Saltu and the oil layer of Group 鈪，

本文編號：1767070