【摘要】：試驗(yàn)區(qū)位于葡萄花油層的北部,是中低滲、高礦化度油藏,目前已經(jīng)進(jìn)入高含水開發(fā)后期。針對葡北試驗(yàn)區(qū)的地質(zhì)條件、儲層物性特點(diǎn)及目前生產(chǎn)狀況,使用相對分子質(zhì)量低但溶液體系粘度高的抗鹽聚合物,以求最大程度地開發(fā)葡北試驗(yàn)區(qū)油藏的剩余油,因此本文提出了葡北試驗(yàn)區(qū)抗鹽聚合物驅(qū)油效果的研究,可為現(xiàn)場實(shí)際生產(chǎn)需要提供理論依據(jù)和技術(shù)支持。通過室內(nèi)性能評價實(shí)驗(yàn),研究了抗鹽聚合物溶液的濃度、放置時間、剪切應(yīng)力、溫度及水質(zhì)對抗鹽聚合物溶液粘度的影響,實(shí)驗(yàn)結(jié)果表明抗鹽聚合物溶液具有良好的耐溫、抗鹽和抗剪切性能;通過PETREL建模軟件建立了葡北試驗(yàn)區(qū)三維地質(zhì)模型,并利用ECLIPSE數(shù)值模擬技術(shù)進(jìn)行水驅(qū)歷史擬合,確定了剩余油的分布規(guī)律和開發(fā)的主力油層;針對試驗(yàn)區(qū)的油層特點(diǎn),利用人造非均質(zhì)巖心和ECLIPSE數(shù)值模擬軟件,研究了注入濃度、注入速度和注入量對抗鹽聚合物溶液驅(qū)油效果的影響,得到了適合葡北試驗(yàn)區(qū)合理的注入?yún)?shù)及注入段塞的大小;在此基礎(chǔ)上進(jìn)行室內(nèi)驅(qū)油實(shí)驗(yàn)和開發(fā)指標(biāo)的預(yù)測,結(jié)果表明,水驅(qū)之后抗鹽聚合物溶液還能提高10%以上的原油采收率;為了更好地開發(fā)試驗(yàn)區(qū)中、低滲透層中的剩余油,對后續(xù)水驅(qū)的開采方式進(jìn)行了優(yōu)選,其中按目前射開目的層進(jìn)行聚驅(qū),聚驅(qū)結(jié)束后補(bǔ)開所有未射孔層進(jìn)入后續(xù)水驅(qū)至含水98%的效果最好,能維持試驗(yàn)區(qū)合理生產(chǎn)18.8年,最終采收率能達(dá)到51.13%。
[Abstract]:The experimental area is located in the north of Putaohua Reservoir, which is a medium and low permeability and high salinity reservoir, and has entered the later stage of high water cut development. In view of the geological conditions, reservoir physical properties and current production conditions in Pubei experimental area, salt-resistant polymers with low relative molecular weight but high viscosity of solution system are used in order to develop the remaining oil in Pubei experimental area to the greatest extent. therefore, the study on the effect of salt-resistant polymer flooding in Pubei test area is put forward in this paper, which can provide theoretical basis and technical support for field production. The effects of concentration, placement time, shear stress, temperature and water quality of salt-resistant polymer solution on the viscosity of salt-resistant polymer solution were studied by laboratory performance evaluation experiment. the experimental results show that salt-resistant polymer solution has good temperature resistance, salt resistance and shear resistance. The three-dimensional geological model of Pubei experimental area is established by PETREL modeling software, and the water drive history is fitted by ECLIPSE numerical simulation technology, and the distribution law of remaining oil and the main reservoir developed are determined. According to the reservoir characteristics of the test area, the effects of injection concentration, injection speed and injection amount on the oil displacement effect of salt polymer solution were studied by using artificial heterogeneous core and ECLIPSE numerical simulation software, and the reasonable injection parameters and plug size suitable for Pubei test area were obtained. On this basis, the laboratory flooding experiment and the prediction of development index are carried out. the results show that the salt-resistant polymer solution can also increase the oil recovery by more than 10% after water flooding. In order to better develop the remaining oil in the low permeability layer in the test area, the recovery mode of the subsequent water drive is optimized, among which the polymer flooding is carried out according to the current target layer, and the effect of filling all the unporous layers into the subsequent water drive to 98% after the polymer flooding is the best, which can maintain the reasonable production of the test area for 18.8 years, and the final recovery can reach 51.13%.
【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】：TE357.46

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相關(guān)期刊論文 前1條

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