本文選題：復(fù)雜鉆井條件　切入點(diǎn)：固液氣三相流　出處：《西安石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著鉆井技術(shù)的發(fā)展和革新,作業(yè)范圍不斷朝著各種難開采的復(fù)雜地層發(fā)展。鉆井工藝也變得越來(lái)越復(fù)雜,而確保全井安全鉆進(jìn)的井控技術(shù)大部分還是以原有的理論模型為指導(dǎo)依據(jù)。這些模型在深井、超深井、大位移井、控壓鉆井、欠平衡鉆井等復(fù)雜井鉆進(jìn)中表現(xiàn)出許多不足。根據(jù)井筒質(zhì)量守恒與動(dòng)量守恒,建立井筒壓力分布模型來(lái)描述環(huán)空壓力變化規(guī)律,較以往的理論方法在計(jì)算井筒壓力精度上明顯提高。諸多基于該理論建立的兩相流模型在復(fù)雜井鉆進(jìn)中起到了重要的指導(dǎo)作用。為了提高井筒壓力分布模型的計(jì)算精度,本文在固液和氣液兩相流的基礎(chǔ)上建立了環(huán)空固液氣三相流壓力分布模型,使得所建立的模型對(duì)于環(huán)空壓力分布模擬計(jì)算更貼近實(shí)際情況。文章還引入了許多復(fù)雜鉆井條件的影響,對(duì)其中的參數(shù)進(jìn)行優(yōu)化。使得模型所涉及的參數(shù)均大部分可從現(xiàn)場(chǎng)檢查設(shè)備獲取,小部分參數(shù)只需要通過(guò)簡(jiǎn)單實(shí)驗(yàn)即可獲取一個(gè)區(qū)塊內(nèi)的通用。因此文章建立的模型不僅精度有所提高,而且現(xiàn)場(chǎng)應(yīng)用推廣可行性高。文章運(yùn)用有限差分法對(duì)模型求解,并引入實(shí)際數(shù)據(jù)進(jìn)行模擬計(jì)算。模擬計(jì)算結(jié)果與純氣柱理論模型模擬結(jié)果及實(shí)測(cè)的幾個(gè)數(shù)據(jù)點(diǎn)對(duì)比,精度明顯提高。這表明該模型能較準(zhǔn)確反映復(fù)雜復(fù)雜鉆井條件對(duì)井筒壓力分布的影響規(guī)律。能較好的應(yīng)用于現(xiàn)場(chǎng)施工計(jì)算,為井控工作的實(shí)施提供比較可靠的數(shù)學(xué)依據(jù)。
[Abstract]:With the development and innovation of drilling technology, the scope of operation is constantly developing towards various complex formations that are difficult to be mined. The drilling process is becoming more and more complex. However, most of the well control techniques to ensure safe drilling in all wells are guided by the original theoretical models. These models are used in deep wells, ultra-deep wells, extended reach wells, and controlled pressure drilling. In complex well drilling such as underbalanced drilling, there are many shortcomings. According to the conservation of wellbore mass and momentum, the wellbore pressure distribution model is established to describe the variation law of annulus pressure. Many two-phase flow models based on this theory play an important guiding role in drilling in complex wells. In order to improve the calculation accuracy of wellbore pressure distribution model, many two-phase flow models based on this theory play an important role in the drilling of complex wells. On the basis of solid-liquid and gas-liquid two-phase flow, the pressure distribution model of annular solid-liquid-gas three-phase flow is established in this paper. The established model is closer to the actual situation for the simulation calculation of annulus pressure distribution. The influence of many complicated drilling conditions is also introduced in this paper. The parameters are optimized so that most of the parameters involved in the model can be obtained from on-site inspection equipment. A small number of parameters can only be obtained by simple experiments. Therefore, the model established in this paper not only improves the accuracy, but also has high feasibility in field application. The finite difference method is used to solve the model. The simulation results are compared with the simulation results of the pure gas column model and the measured data points. It shows that the model can accurately reflect the influence of complex drilling conditions on wellbore pressure distribution, and can be applied to field operation calculation and provide a reliable mathematical basis for the implementation of well control work.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE21

【共引文獻(xiàn)】

相關(guān)期刊論文 前3條

1 孟胡;周海峰;王雪;席巖;李文哲;蔣振新;杜琦元;張海波;劉錦江;;氣侵早期檢測(cè)新方法[J];科學(xué)技術(shù)與工程;2014年27期

2 劉清友;汪興明;徐濤;;考慮瞬態(tài)溫度場(chǎng)的水平井水力沖砂臨界排量[J];西南交通大學(xué)學(xué)報(bào);2014年06期

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相關(guān)碩士學(xué)位論文 前4條

1 汪興明;水平井水力沖砂施工參數(shù)及工具研究[D];西南石油大學(xué);2014年

2 張墨;深層稠油油藏?zé)崴?qū)開發(fā)技術(shù)政策研究[D];西南石油大學(xué);2014年

3 曾冀;超臨界二氧化碳?jí)毫丫矞囟葔毫?chǎng)模型研究[D];西南石油大學(xué);2014年

4 葉靜;正理莊油田CO_2輸送及注入工藝研究[D];西南石油大學(xué);2015年

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本文編號(hào)：1572086