本文選題：油藏數(shù)值模擬 + 特低滲儲層��； 參考：《長江大學(xué)》2015年碩士論文

【摘要】：隨著虎狼峁區(qū)長6油藏含油面積的逐漸擴(kuò)大,開發(fā)井及擴(kuò)邊井的增加,地下地質(zhì)條件的不斷變化,在開發(fā)過程中會存在注水單向突進(jìn),含水上升快、水驅(qū)效果不理想等問題。為此,本文對于虎狼峁區(qū)長6油藏的低滲、特低滲儲層的特點(diǎn),通過油藏數(shù)值模擬研究、油藏工程研究技術(shù)等手段,進(jìn)一步對該區(qū)進(jìn)行重新的認(rèn)識和研究,推出了一套適合本區(qū)的開發(fā)技術(shù)政策及注水調(diào)控技術(shù)措施。虎狼峁區(qū)位于陜西省靖邊與志丹一吳旗一安塞縣的境內(nèi)。以靖安油田為主,東跨楊米澗和安塞油田杏河區(qū),西跨吳旗油田東半?yún)^(qū)。從區(qū)域構(gòu)造上看,本區(qū)位于陜北的斜坡中部,為一平緩的西傾單斜,地層傾角小于1度,坡降為6～8m/km,其上發(fā)育多排軸向近東西或北東-南西向的鼻狀構(gòu)造帶。采收率是衡量油田開發(fā)水平高低的一個重要指標(biāo),而經(jīng)過推導(dǎo)可以得出分析原油采收率的通用公式。由公式可知,有很多方面的因素諸如：井網(wǎng)密度f、儲量系數(shù)α、滲透率k、平均單井射開厚度he、生產(chǎn)時間t、生產(chǎn)壓差(Pe—Pwf—PG)、綜合含水率fw、油水粘度比μR、供給半徑Re、表皮系數(shù)S以及油田的開發(fā)時間等都會影響水驅(qū)開發(fā)油藏采收率,且各因素之間存在著相互聯(lián)系、相互制約。這些因素是油藏地質(zhì)的固有屬性,是我們無法改變的,所以提高采收率主要在于調(diào)整開發(fā)技術(shù)上。而影響低滲透油田采收率的開發(fā)因素是源于多方面的,例如布井方式和井網(wǎng)密度、生產(chǎn)壓差、油井工作制度、采油工藝水平和開發(fā)調(diào)整措施都會影響最終的采收率。因此我們要結(jié)合實(shí)際情況調(diào)整這些開發(fā)因素,使其達(dá)到最優(yōu)化從而使采收率得到提高。通過油藏工程分析,了解到對于該區(qū)塊,注水開發(fā)是恢復(fù)地層壓力、提高單井產(chǎn)能和開發(fā)效果的關(guān)鍵性技術(shù)問題。而且早期注水補(bǔ)充地層能量對提高單井產(chǎn)能和開發(fā)效益具有重要作用。在注水期間我們需要調(diào)整好合適的油田開發(fā)技術(shù),因此本文運(yùn)用數(shù)值模擬的方法,截取地質(zhì)建模中的一個區(qū)塊,對其井底流壓、注采比、采液速度進(jìn)行優(yōu)選。得到了該區(qū)塊合理的井底流壓為9MPa,合理的注采比為1.1,合理的采液速度為1.7%。研究結(jié)果表明,適當(dāng)?shù)亟档途琢鲏?增加采液速度,并且選擇合適的注采比將有利于提高產(chǎn)量。
[Abstract]:With the gradual expansion of oil bearing area in Chang 6 reservoir, the increase of the development wells and the expansion wells and the continuous change of underground geological conditions, there will be some problems in the process of development, such as water injection unidirectional penetration, fast rising water cut, and poor water drive effect. Reservoir numerical simulation research, reservoir engineering research technology and other means to further understand and study the area, and introduce a set of technical policies and water injection control measures suitable for this area. The tiger wolf and hilly area is located in the territory of Jingbian, Shaanxi province and the Ansai County of Wuqi, Zhidan. The area is located in the middle of the slope of Northern Shaanxi, which is a gentle westward inclined monocline, the dip angle is less than 1 degrees and the slope is 6 ~ 8m/km, and it has many rows of axial near East-West or north-east NW nose structural belts. According to the formula, there are many factors, such as well network density F, reserve coefficient alpha, permeability K, average single well ejection thickness he, production time t, production pressure difference (Pe - Pwf - PG), synthetic water content FW, oil and water viscosity ratio, Re, epidermal coefficient S. And the development time of the oil field will affect the recovery of water drive reservoir, and there are interconnections and mutual constraints among the factors. These factors are inherent properties of reservoir geology and we can not change the oil recovery. Therefore, the improvement of the recovery rate is mainly to adjust the development technology. In many aspects, such as well distribution mode and well network density, production pressure difference, oil well work system, oil production technology level and development adjustment measures will affect final recovery. Therefore, we should adjust these development factors in combination with actual conditions so that they can be optimized so that the recovery rate can be improved. Through reservoir engineering analysis, we know that For the block, water injection is the key technical problem to restore the formation pressure and improve the productivity and development effect of the single well. Moreover, the early water injection to supplement the formation energy plays an important role in improving the productivity and efficiency of the single well. In the period of water injection, we need to adjust the appropriate oil field development technology. Therefore, this paper uses the numerical simulation method. The method is to intercept a block in the geological modeling, to optimize the flow pressure at the bottom of the well, the injection production ratio, and the speed of the mining. The reasonable bottom hole flow pressure of the block is 9MPa, the reasonable injection production ratio is 1.1, the reasonable extraction speed is 1.7%., which shows that the well bottom flow pressure is properly reduced, the recovery speed is increased, and the suitable injection production ratio will be selected. It is beneficial to increase the output.

【學(xué)位授予單位】：長江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357

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