本文選題：超前注水 + 壓力梯度�。� 參考：《東北石油大學(xué)》2015年碩士論文

【摘要】：源121-3區(qū)塊屬于肇源油田,其位于黑龍江省大慶市肇源縣境內(nèi),構(gòu)造位置位于松遼盆地中央坳陷區(qū)朝陽(yáng)溝階地西部肇源鼻狀構(gòu)造上。源121-3區(qū)塊屬于的中孔低滲型油藏,該油藏具有滲透率低,油層滲流阻力大,地層壓力傳導(dǎo)能力差,并且存在啟動(dòng)壓力梯度,一旦地層壓力大幅下降就很極恢復(fù)等特點(diǎn)。油井投入生產(chǎn)后,因?yàn)槟芰坎粩嘞挠值貌坏郊皶r(shí)補(bǔ)充,所以油井產(chǎn)量遞減快,地層壓力極速下降,從而引起油層地質(zhì)孔隙結(jié)構(gòu)發(fā)生變化、巖石骨架結(jié)構(gòu)發(fā)生變形,造成油層孔隙度變小,巖石滲透率降低,不利于源121-3區(qū)塊的開(kāi)發(fā)。本文利用數(shù)值模擬方法進(jìn)行源121-3區(qū)塊超前注水配套措施組合優(yōu)化研究,通過(guò)預(yù)測(cè)油井普通壓裂及定向壓裂的開(kāi)發(fā)效果,確定最優(yōu)的措施方案,為源121-3區(qū)塊實(shí)施超前注水技術(shù)以及現(xiàn)場(chǎng)試驗(yàn)方案設(shè)計(jì)提供理論與技術(shù)指導(dǎo)。通過(guò)對(duì)超前注水機(jī)理的研究及現(xiàn)場(chǎng)試驗(yàn),建立了有效的驅(qū)替壓力系統(tǒng),使地層壓力始終保持較高的水平,降低了因地層壓力下降造成的地層傷害,抑制了油井的初始含水率,從而提高了投產(chǎn)初期油田的產(chǎn)量,使得油田能夠保持較長(zhǎng)的穩(wěn)產(chǎn)期,減緩了遞減,提高最終采收率。
[Abstract]:Block 121-3 belongs to Zhaoyuan Oilfield, located in Zhaoyuan County, Daqing City, Heilongjiang Province, and located on Zhaoyuan nose structure in the west of Chaoyang ditch Terrace in the Central Depression of Songliao Basin. Yuan-121-3 block belongs to the middle porosity and low permeability reservoir. The reservoir has the characteristics of low permeability, large permeability resistance, poor pressure conductivity, and the existence of start-up pressure gradient, which can be extremely restored once the formation pressure drops significantly. After the oil well is put into production, because the energy is constantly consumed and cannot be replenished in time, the oil well production decreases rapidly, the formation pressure drops extremely quickly, which causes the change of the geological pore structure of the reservoir and the deformation of the rock skeleton structure. The porosity of reservoir becomes smaller and the permeability of rock decreases, which is unfavorable to the development of block 121-3. In this paper, a numerical simulation method is used to optimize the combination of advanced water injection measures in Yuan 121-3 block, and the optimal measures are determined by predicting the development effect of common fracturing and directional fracturing in oil wells. It provides theoretical and technical guidance for the implementation of advanced water injection technology and field test scheme design in source 121-3 block. An effective displacement pressure system is established by studying the mechanism of advanced water injection and field test, which keeps the formation pressure high, reduces the formation damage caused by the decrease of formation pressure, and suppresses the initial water cut of oil well. Thus, the production of the oil field in the initial stage of production is increased, the oil field can maintain a longer stable production period, the decline is slowed down, and the final recovery is improved.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE357.6

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相關(guān)期刊論文 前2條

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本文編號(hào)：2054101