【摘要】：在我國當前現(xiàn)有的油氣總儲量中,在物性很差的薄差儲層中儲存著很大一部分油氣,自然產(chǎn)能十分低下。除了油層本身有較低的自然滲透率和物性差,在油田開采的后期,由于地層壓力的較大幅度下降導(dǎo)致地層產(chǎn)生了不可逆塑性形變,油層的滲透率也隨之降低;而且這些油層本身具有較小的有效厚度,各項物性的非均質(zhì)性特別嚴重,平面分布又不連續(xù),這就為有效的開發(fā)利用薄差儲層增添了難度。本文以大慶油田杏六區(qū)為對象,通過室內(nèi)實驗,研究影響薄差儲層動用效果因素,并確定杏六區(qū)薄差層合理注采方式。本文基于前人的研究基礎(chǔ),進行了大量的文獻調(diào)研,對表外巖樣進行常規(guī)物性測試并利用穩(wěn)定法進行啟動壓力測試;通過人造澆鑄巖心對杏六區(qū)進行滲透率級差篩選,找出低滲透層動用臨界值,并利用可視化巖心微觀驅(qū)替實驗,研究薄差層剩余油分布對動用效果影響;通過人造澆鑄巖心模擬研究薄差層間和層內(nèi)非均質(zhì)性對薄差層采收效果的影響,其中包括不連續(xù)泥質(zhì)薄夾層的分布模型和砂體疊置及相變模型的研究,找出在不同注采方式下影響薄差層水驅(qū)采收效果影響因素,得出薄差儲層水驅(qū)規(guī)律,為薄差儲層的有效開發(fā)提供一定的理論依據(jù)。
[Abstract]:In the current total oil and gas reserves in China, a large part of oil and gas is stored in thin and poor reservoirs with poor physical properties, and the natural productivity is very low. In addition to the low natural permeability and poor physical properties of the reservoir itself, in the later stage of oil field production, due to the large decrease of formation pressure, the formation produces irreversible plastic deformation, and the permeability of the reservoir also decreases. Moreover, these reservoirs themselves have small effective thickness, the heterogeneity of various physical properties is particularly serious, and the plane distribution is not continuous, which adds difficulty to the effective development and utilization of thin and poor reservoirs. In this paper, taking Xing6 area of Daqing Oilfield as the object, through laboratory experiments, the factors affecting the production effect of thin difference reservoir are studied, and the reasonable injection and production mode of thin difference layer in Xing6 area is determined. In this paper, based on the previous research basis, a large number of literature research has been carried out, the conventional physical properties of off-surface rock samples have been tested and the start-up pressure test has been carried out by using the stability method. Through the screening of permeability grade difference of Xingliu district by artificial casting core, the critical value of low permeability layer is found out, and the influence of residual oil distribution in thin difference layer on the production effect is studied by using visual core microdisplacement experiment. The effect of heterogeneity between and within thin layers on the recovery effect of thin difference layers is studied by artificial casting core simulation, including the distribution model of discontinuity muddy thin interlayer and the superposition and phase transformation model of sand body. The influencing factors of water drive recovery effect in thin difference layer under different injection and production modes are found out, and the water drive law of thin difference reservoir is obtained, which provides a certain theoretical basis for the effective development of thin difference reservoir.
【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】：2015
【分類號】：TE357

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相關(guān)期刊論文 前1條

1 王國民,高江取,劉孔章,胡心玲,付春華;復(fù)雜斷塊油藏氮氣驅(qū)提高采收率技術(shù)研究[J];特種油氣藏;2004年03期

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本文編號：2483702