本文選題：馬嶺北三區(qū) + 延10儲(chǔ)層��； 參考：《西北大學(xué)》2017年碩士論文

【摘要】：馬嶺油田北三區(qū)延10儲(chǔ)層經(jīng)過十余年的開采,目前已處于中高含水階段,水淹程度復(fù)雜,剩余油分布零散且難以預(yù)測(cè),對(duì)下一步的開發(fā)提出了難題。本文在對(duì)研究區(qū)小層精細(xì)劃分,沉積微相劃分,局部構(gòu)造特征辨別的基礎(chǔ)上,開展對(duì)研究區(qū)非均質(zhì)性研究,從宏觀和微觀兩個(gè)角度,通過掃描電鏡、鑄體薄片、高壓壓汞、恒速壓汞、油水相滲以及真實(shí)砂巖水驅(qū)油實(shí)驗(yàn)等實(shí)驗(yàn)手段,對(duì)非均質(zhì)性進(jìn)行表征,并簡(jiǎn)析了研究區(qū)非均質(zhì)性的影響因素,主要取得以下結(jié)論認(rèn)識(shí):1、研究區(qū)延10儲(chǔ)層屬于從下到上由辮狀河亞相向曲流河亞相過渡的河流相沉積體系,河道砂體在平面上連續(xù)性較好,縱向上互相疊加,整體構(gòu)造較為平緩,局部發(fā)育微構(gòu)造。2、研究區(qū)延10儲(chǔ)層宏觀上平面非均質(zhì)性較強(qiáng),主要受沉積微相分布控制;各小層層內(nèi)非均質(zhì)性較弱,但從上到下依次變強(qiáng);層間非均質(zhì)性較弱。3、研究區(qū)儲(chǔ)層孔隙類型有粒間孔、溶孔以及晶間孔,孔隙組合類型有粒間孔型、粒間孔-溶孔型以及粒間孔-晶間孔型,其微觀非均質(zhì)性依次增強(qiáng)。通過高壓壓汞和恒速壓汞實(shí)驗(yàn),研究區(qū)微觀非均質(zhì)性整體較弱,其中微觀孔隙非均質(zhì)性較弱,而微觀喉道的非均質(zhì)性較強(qiáng)。4、不同孔隙結(jié)構(gòu)具有不同的滲流特征,影響驅(qū)油效率的因素有孔滲參數(shù)、非均質(zhì)程度、水驅(qū)倍數(shù)、驅(qū)替壓力以及潤(rùn)濕性,其中最主要因素是孔隙結(jié)構(gòu)的非均質(zhì)程度。5、沉積作用控制了砂體展布,影響了儲(chǔ)層平面上以及層內(nèi)的非均質(zhì)性,產(chǎn)生了微構(gòu)造;成巖作用的不均衡性導(dǎo)致了儲(chǔ)層微觀非均質(zhì)性;由于注水開發(fā)導(dǎo)致儲(chǔ)層內(nèi)水洗程度不同,從而導(dǎo)致非均質(zhì)性的加劇。
[Abstract]:After more than ten years of exploitation, Y10 reservoir in North third area of Maling Oilfield has been in the middle and high water-cut stage, the degree of water flooding is complex, the distribution of remaining oil is scattered and difficult to predict, and a difficult problem is put forward for the next development.On the basis of fine division of sublayer, division of sedimentary microfacies and discrimination of local structural characteristics, the heterogeneity of the study area was studied in this paper. From the macro and micro perspectives, the study was carried out through scanning electron microscopy, thin sheet casting, high pressure mercury injection.The heterogeneity was characterized by means of constant velocity mercury injection, oil-water phase permeation and real sandstone water flooding experiments, and the influencing factors of heterogeneity in the study area were briefly analyzed.The main conclusions are as follows: the Yan10 reservoir in the study area belongs to fluvial facies sedimentary system from braided river subfacies to meandering river subfacies. The river channel sand body has good continuity on the plane and superimposed on each other longitudinally.The whole structure is relatively smooth, the microstructure is developed locally, and the macroscopic plane heterogeneity of Yan 10 reservoir is strong, which is mainly controlled by the distribution of sedimentary microfacies, the heterogeneity in each small layer is weak, but it becomes stronger from top to bottom.The reservoir pore types in the study area are intergranular pore, dissolved pore and intergranular pore. The pore assemblage types include intergranular pore type, intergranular pore dissolution type and intergranular pore-intergranular pore type, and the microscopic heterogeneity increases in turn.Through the experiments of high pressure mercury injection and constant velocity mercury injection, the microcosmic heterogeneity of the studied area is relatively weak, in which the microscopic pore heterogeneity is weak, and the microscopic throat channel heterogeneity is stronger. 4. Different pore structures have different percolation characteristics.The influencing factors of oil displacement efficiency are porosity and permeability parameter, heterogeneity degree, water drive multiple, displacement pressure and wettability. The most important factor is the heterogeneity degree of pore structure .5.Sedimentary action controls the distribution of sand body.It affects the heterogeneity in the reservoir plane and in the formation, and produces microstructures; the uneven diagenesis leads to the microscopic heterogeneity of reservoir; the water flooding development leads to the different degree of water washing in the reservoir, which leads to the aggravation of the heterogeneity.
【學(xué)位授予單位】：西北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13
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本文編號(hào)：1736263