發(fā)布時間：2018-05-22 19:53

  本文選題：非主力層 + 層系調(diào)整��； 參考：《東北石油大學(xué)》2016年碩士論文

【摘要】：杏北開發(fā)區(qū)歷經(jīng)40余年水驅(qū)開發(fā),注采井網(wǎng)從基礎(chǔ)井網(wǎng)調(diào)整到三次加密井網(wǎng),部署方式從行列式布井逐漸轉(zhuǎn)為五點法布井,注采井距由600m縮小至141m;開采對象由一類油層及有效厚度不小于2.0m的厚油層過渡到薄差油層,目前已進入特高含水期階段,剩余油分布零散。在目前層系井網(wǎng)條件下,存在縱向上油層動用不均衡、平面上非主力層控制及動用程度偏低等開發(fā)矛盾,制約了水驅(qū)開發(fā)效果的進一步提高。為了充分挖掘剩余油潛力,必須根據(jù)油層開發(fā)特征進行層系的重新劃分和注采井網(wǎng)的重新匹配,探索特高含水期改善水驅(qū)開發(fā)效果的有效途徑。本文在詳盡認識杏四區(qū)西部的地層結(jié)構(gòu)和儲層特點的基礎(chǔ)上,借助Petrel地質(zhì)建模軟件建立儲層三維地質(zhì)模型,并利用油藏生產(chǎn)動態(tài)數(shù)據(jù),對杏四區(qū)西部水驅(qū)開發(fā)階段進行產(chǎn)液量、含水率擬合,擬合精度在3%以內(nèi),計算非主力層地質(zhì)儲量為2352.69萬噸、采出程度為43.39%。通過分析非主力層目前和含水98%時縱向和平面剩余油分布情況,研究現(xiàn)井網(wǎng)適應(yīng)性和加密調(diào)整潛力,制定層系井網(wǎng)優(yōu)化調(diào)整方案,并從開發(fā)效果和經(jīng)濟效益進行優(yōu)選。結(jié)果表明:方案3將非主力層分3套層系開采,含水率下降了3.08%,采收率提高了4.70%,凈收益最大,為最優(yōu)布井方案,即薩爾圖好層200m行列加密井網(wǎng)、薩爾圖差層141m五點法加密井網(wǎng)、葡I4組及以下油層180m五點法加密井網(wǎng),這一結(jié)論為改善高含水階段非主力層動用程度提供借鑒。
[Abstract]:After more than 40 years of water drive development in Xingbei Development Zone, the injection-production pattern was adjusted from the basic well pattern to the third infill well pattern, and the deployment mode gradually changed from the determinant well layout to the five-point well distribution. The interval between injection and production has been reduced from 600m to 141m, and the production object has been transferred from a class of reservoirs and thick reservoirs with effective thickness of not less than 2.0 m to thin and poor reservoirs. At present, they have entered the stage of extremely high water cut, and the remaining oil distribution is scattered. Under the condition of the present well pattern in the stratigraphic system, there are some development contradictions, such as the unbalanced production of the vertical oil layer, the low degree of production and the control of the non-main layer in the plane, which restrict the further improvement of the development effect of water drive. In order to fully exploit the potential of remaining oil, it is necessary to redivide the formation system and rematch the injection-production pattern according to the characteristics of reservoir development, and to explore an effective way to improve the development effect of water drive during the period of super high water cut. On the basis of a detailed understanding of the stratigraphic structure and reservoir characteristics in the west of Xing4 area, this paper establishes a three-dimensional geological model of the reservoir with the help of Petrel geological modeling software, and makes use of the reservoir production dynamic data to produce liquid during the development stage of water drive in the western part of Xing4 district. The fitting precision of water cut is less than 3%, the geological reserves of non-main layer is 23.5269 million tons and the degree of recovery is 43.39. By analyzing the distribution of vertical and plane remaining oil in the non-main layer and the water cut of 98, the adaptability of existing well pattern and the potentiality of infilling adjustment are studied, and the optimum adjustment scheme of the well pattern is formulated, and the optimum selection is made from the development effect and economic benefit. The results show that the water cut is reduced by 3.08, the recovery factor is increased by 4.70, and the net income is the largest, which is the best well layout scheme, that is, the well pattern of 200 m column in Saltuo and 141m five-point infill well pattern of Saltu difference layer. The results show that the water cut is reduced by 3.08, the recovery factor is increased by 4.70, and the net income is the largest. The result of 180m five-point infill well pattern of Pui _ 4 group and below provides a reference for improving the production degree of non-main reservoir in high water cut stage.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TE341

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