【摘要】：在多層油藏合采開(kāi)發(fā)過(guò)程中,層間干擾現(xiàn)象必然存在。海上稠油的開(kāi)發(fā),由于受到平臺(tái)條件和環(huán)境因素限制,多針對(duì)可進(jìn)行注水開(kāi)發(fā)的常規(guī)稠油通過(guò)大段合采的方式進(jìn)行。稠油油藏中較大的油水黏度差異將導(dǎo)致層間干擾現(xiàn)象更加明顯,而大段合采帶來(lái)諸多因素的層間非均質(zhì),使得層間干擾更為嚴(yán)重。 針對(duì)上述問(wèn)題,本文對(duì)多層常規(guī)稠油油藏開(kāi)發(fā)過(guò)程中各層間非均質(zhì)因素對(duì)層間干擾影響規(guī)律進(jìn)行了以下研究： (1)為了研究層間干擾動(dòng)態(tài)過(guò)程,從衰竭開(kāi)采方式入手在擬穩(wěn)定狀態(tài)下對(duì)產(chǎn)量進(jìn)行劈分,研究層間干擾發(fā)生過(guò)程及各層間非均質(zhì)因素對(duì)層間干擾的影響規(guī)律； (2)通過(guò)Eclipse數(shù)值模擬軟件建立注水開(kāi)發(fā)方式下多層合采和分采模型,對(duì)比開(kāi)發(fā)過(guò)程中各層的產(chǎn)油量、產(chǎn)水量、貢獻(xiàn)率、采出程度以及比采油指數(shù)等指標(biāo),分析各層間非均質(zhì)因素對(duì)層間干擾的影響過(guò)程,通過(guò)分析計(jì)算找到各因素級(jí)差與層間干擾系數(shù)的關(guān)系； (3)通過(guò)正交試驗(yàn)設(shè)計(jì)多因素對(duì)層間干擾綜合影響研究方案,分析多因素綜合影響下層間干擾系數(shù)與各因素單獨(dú)作用時(shí)層間干擾系數(shù)之間的關(guān)系,通過(guò)最小二乘法進(jìn)行多元回歸,從而對(duì)該類(lèi)油藏建立層間干擾的層間非均質(zhì)表征體系。 通過(guò)本文的研究取得了以下認(rèn)識(shí)： (1)多層合采油藏開(kāi)發(fā)過(guò)程中由于井筒溝通各儲(chǔ)層,導(dǎo)致各層壓力相互平衡,帶來(lái)層間干擾。 (2)在注水開(kāi)發(fā)的多層合采油藏中,由于各層性質(zhì)存在差異,初期吸水多的油層流體總黏度下降幅度大,使該層滲流能力進(jìn)一步增加,從而增大層間差異,加劇層間干擾。 (3)多層合采油藏注水開(kāi)發(fā)過(guò)程中,某一層突破見(jiàn)水將對(duì)其他合采層產(chǎn)生嚴(yán)重干擾。由于稠油油藏油水黏度差異大,多層合采過(guò)程中見(jiàn)水帶來(lái)的層間干擾更加顯著。 利用本文方法對(duì)綏中36-1油田典型井進(jìn)行層系優(yōu)化方案優(yōu)選,評(píng)價(jià)各方案層間干擾影響大小,通過(guò)該油藏?cái)?shù)值模擬模型對(duì)各個(gè)方案進(jìn)行預(yù)測(cè),結(jié)果表明,本文方法優(yōu)選方案比其他方案開(kāi)發(fā)效果更好,利用該方法能夠?qū)椫?6-1油田類(lèi)似的高滲常規(guī)稠油油藏中多因素影響層間干擾影響大小進(jìn)行簡(jiǎn)便、快速的評(píng)估。
[Abstract]:In the process of multi-layer reservoir production and development, the phenomenon of interlayer interference is bound to exist. The development of offshore heavy oil is limited by platform conditions and environmental factors, and the conventional heavy oil which can be developed by water injection is carried out through the way of large section co-production. The large difference of oil-water viscosity in heavy oil reservoir will lead to more obvious interlayer interference, and the interlayer interference is more serious because of the heterogeneity of interlayer which is caused by many factors in large-section combined production. In order to solve the above problems, the influence of interlayer heterogeneity factors on interlayer interference in the development of multi-layer conventional heavy oil reservoirs is studied as follows: (1) in order to study the dynamic process of interlayer interference, In order to study the interlayer interference process and the influence of different interlayer heterogeneity factors on the interlayer interference, the yield is split under the quasi-stable state from the failure mining mode. (2) through the Eclipse numerical simulation software, the multi-layer combined production model and the separate production model under the water injection development mode are established, and the oil production, water production, contribution rate, recovery degree and specific oil recovery index of each layer in the development process are compared. The influence process of heterogeneous factors on interlayer interference is analyzed, and the relationship between the order difference of each factor and the interlayer interference coefficient is found out through the analysis and calculation. (3) through the orthogonal experiment to design the research scheme of multi-factor influence on the interlayer interference, the relationship between the interlayer interference coefficient and the interlayer interference coefficient is analyzed when the multi-factor synthetically affects the interlayer interference coefficient. By using the least square method to carry out multiple regression, an interlayer heterogeneous representation system of interlayer interference is established for this kind of reservoir. Through the research in this paper, the following knowledge has been obtained: (1) in the process of multi-layer reservoir development, the wellbore communicates with each reservoir, which leads to the balance of the pressure of each layer and the interlayer interference. (2) in the multi-layer oil reservoir developed by water injection, due to the difference of the properties of each layer, the total viscosity of the reservoir fluid with more water absorption in the initial stage decreases greatly, which further increases the percolation capacity of the reservoir, thereby increasing the inter-layer difference and aggravating the inter-layer interference. (3) in the process of water injection development in multi-layer reservoir, a breakthrough of water-seeing layer will cause serious interference to other co-production zones. Because of the big difference of oil-water viscosity in heavy oil reservoir, the interlayer interference caused by water in multi-layer production is more obvious. This method is used to optimize the strata system of typical wells in Suizhong 36m1 Oilfield, and to evaluate the influence of interlayer interference. The numerical simulation model of the reservoir is used to predict each scheme, and the results show that: This method can be used to evaluate the influence of multi-factors on interlayer interference in similar high permeability conventional heavy oil reservoirs in Suizhong 36 ~ (1) oilfield, where the development results are better than those of other schemes in this paper. The method can be used to evaluate the influence of multi-factors on interlayer interference in similar high permeability heavy oil reservoirs.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TE53

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