【摘要】：近年來,許多油田進(jìn)入了開發(fā)后期,出現(xiàn)了枯竭儲(chǔ)層,使用普通鉆井液常遇漏失和壓差卡鉆等問題。微泡沫鉆井液與常規(guī)鉆井液相比,具有低密度且獨(dú)特封堵能力的優(yōu)勢(shì)而引起人們的廣泛重視。本文結(jié)合吉林油田實(shí)際情況,通過評(píng)價(jià)發(fā)泡量和半衰期等方法對(duì)發(fā)泡劑、穩(wěn)泡劑進(jìn)行優(yōu)選,研制出適合微泡沫發(fā)揮作用的微泡沫鉆井液配方,并對(duì)其進(jìn)行系統(tǒng)的室內(nèi)評(píng)價(jià);在此基礎(chǔ)上,給出了微泡沫鉆井液的泡沫尺寸范圍、穩(wěn)定性和流變特性的統(tǒng)計(jì)學(xué)評(píng)價(jià)結(jié)果;通過測(cè)量排液量、監(jiān)測(cè)泡沫膨脹速度和剪切壓力、剪切速率隨時(shí)間變化情況對(duì)微泡沫鉆井液進(jìn)行穩(wěn)定性分析。用八種流變模型對(duì)微泡沫鉆井液的剪切流動(dòng)特性進(jìn)行數(shù)量描述,對(duì)每種模型的應(yīng)用進(jìn)行詳細(xì)的檢驗(yàn)。最終建立了考慮溫度和剪切速率對(duì)微泡沫鉆井液粘度影響的新模型,研究結(jié)果對(duì)微泡沫鉆井液體系在現(xiàn)場(chǎng)的應(yīng)用有很大指導(dǎo)意義。
[Abstract]:In recent years, many oilfields have entered the late stage of development, there have been depleted reservoirs, the use of ordinary drilling fluid often encountered leakage and pressure difference stuck drilling and other problems. Compared with conventional drilling fluid, microfoam drilling fluid has the advantage of low density and unique plugging ability. In this paper, according to the actual situation of Jilin oilfield, the foaming agent and stabilizing agent are optimized by evaluating the foaming capacity and half-life, and the formulation of microfoam drilling fluid suitable for micro-foam is developed and evaluated systematically in laboratory. On this basis, the results of statistical evaluation of foam size, stability and rheological properties of microfoam drilling fluid are given. The stability analysis of microfoam drilling fluid is carried out by measuring the liquid discharge rate, monitoring the foam expansion rate and shear pressure, and analyzing the stability of microfoam drilling fluid with the variation of shear rate with time. The shear flow characteristics of microfoam drilling fluid are described quantitatively by eight rheological models, and the application of each model is examined in detail. Finally, a new model considering the effect of temperature and shear rate on the viscosity of microfoam drilling fluid is established. The results are of great significance to the field application of microfoam drilling fluid system.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE254

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本文編號(hào)：2433711