本文選題：特高含水油藏 + 優(yōu)勢通道　； 參考：《中國石油大學(xué)(華東)》2015年碩士論文

【摘要】：注水井深部調(diào)剖是非均質(zhì)油藏控水穩(wěn)油、提高水驅(qū)采收率的重要手段。我國絕大多數(shù)油田都進(jìn)入了高含水或特高含水開采期,非均質(zhì)性嚴(yán)重,長期的注水沖刷、反復(fù)射孔換層和部分井組及區(qū)塊的強(qiáng)注強(qiáng)采,使得縱向、平面和層間滲透率差異進(jìn)一步加劇,深部調(diào)剖工藝的難度越來越大,實(shí)施效果越來越差,常規(guī)的堵水調(diào)剖技術(shù)已經(jīng)不能滿足油田生產(chǎn)的各種需求。深部調(diào)剖技術(shù)在特高含水期油藏應(yīng)該有一定的適應(yīng)性和應(yīng)用范圍,然而目前國內(nèi)外還沒有開展深部調(diào)剖技術(shù)界限這一方面的研究。在分析特高含水油藏深部調(diào)剖效果變差原因的基礎(chǔ)上,確定了影響深部調(diào)剖效果的地質(zhì)因素和開發(fā)因素等技術(shù)指標(biāo),建立物理實(shí)驗(yàn)?zāi)Ｐ?以分流比作為評價(jià)指標(biāo),評價(jià)了常用調(diào)剖體系對吸水剖面的改善程度,為數(shù)值模擬提供了參數(shù)支持。實(shí)驗(yàn)結(jié)果證明了凍膠和顆粒類等堵劑的封堵特點(diǎn)和改善吸水剖面的能力,其中凍膠堵大優(yōu)于堵小、顆粒類堵劑堵小優(yōu)于堵大,為堵劑礦場應(yīng)用選擇提供了依據(jù)。利用數(shù)值模擬方法建立了符合中高滲透油藏地質(zhì)特征的概念模型,根據(jù)模擬結(jié)果制定了特高含水油藏深部調(diào)剖技術(shù)界限圖版,其中原油粘度小于5 mPa·s和滲透率級差小于2的油藏均不適合深部調(diào)剖;調(diào)剖時(shí)機(jī)越早越好;含水率在90%~95%時(shí),封堵半徑大約在0.4~0.6之間效果較好;含水率在95%~98%時(shí),封堵半徑大約在0.6~0.8之間效果較好。利用特高含水區(qū)塊的48個(gè)井組調(diào)剖結(jié)果驗(yàn)證了所確定的深部調(diào)剖技術(shù)界限準(zhǔn)確性。該研究成果分別在勝坨油田T1433區(qū)塊STT143X29井組和T28斷塊ST3-6-09井組進(jìn)行了應(yīng)用驗(yàn)證,證明了所建理論圖版是正確的,為特高含水油藏深部調(diào)剖選井選層決策提供了一條可行的捷徑。
[Abstract]:Deep profile control in water injection wells is an important means to control water and stabilize oil and improve water flooding recovery. Most oil fields in China have entered the period of high water cut or extra high water cut, with serious heterogeneity, long term flooding and scouring, repeated perforation change and strong injection and strong production of some well groups and blocks, resulting in longitudinal, The difference between plane and interlayer permeability is further aggravated, the deep profile control process is becoming more and more difficult, and the effect is getting worse and worse. The conventional water plugging and profile control technology can no longer meet the needs of oilfield production. Deep profile control technology should have a certain adaptability and application scope in ultra-high water-cut reservoirs. However, there is no research on deep profile control technology limits at home and abroad. Based on the analysis of the reasons for the deterioration of deep profile control effect in ultra-high water-cut reservoirs, the technical indexes such as geological factors and development factors affecting the deep profile control effect are determined, and the physical experimental model is established, and the distributary ratio is taken as the evaluation index. The improvement of water absorption profile by common profile control system is evaluated, which provides parameter support for numerical simulation. The experimental results show that the plugging characteristics of gel and granular plugging agent and the ability to improve the water absorption profile are proved. The large gel plugging is better than the small plugging, and the particle plugging agent is better than the plugging one, which provides the basis for the selection of plugging agent field. Based on the numerical simulation method, a conceptual model which accords with the geological characteristics of medium and high permeability reservoirs is established. According to the simulation results, the deep profile control technical boundary charts of ultra-high water cut reservoirs are worked out. The oil reservoirs with oil viscosity less than 5 mPa s and permeability difference less than 2 are not suitable for deep profile control. The earlier the profile control time is, the better. When water cut is between 90 and 95, the plugging radius is about 0.4 ~ 0.6, and the water cut is 95 ~ 98. The plugging radius is about 0.6 ~ 0.8 and the effect is better. The profile control results of 48 well groups in ultra-high water cut blocks are used to verify the accuracy of the technical limits of deep profile control. The research results have been applied to STT143X29 well group and T28 block ST3-6-09 well group in Shengtuo Oilfield, respectively. It is proved that the theoretical chart is correct and provides a feasible shortcut for the decision of deep profile control and reservoir selection in ultra-high water cut reservoir.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.6

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