【摘要】：氣體鉆井相對(duì)常規(guī)鉆井具有鉆速快、防井漏、保護(hù)油氣層等技術(shù)優(yōu)勢(shì),在各油田的應(yīng)用越來(lái)越廣,然而在實(shí)際鉆井施工中,若地層出水則容易造成井壁坍塌、卡鉆等井下復(fù)雜事故,限制了氣體鉆井的使用范圍。因此,對(duì)于準(zhǔn)確預(yù)測(cè)出水層位、確定出水量以及出水后如何處理,成為推廣應(yīng)用氣體鉆井技術(shù)的瓶頸之一。 本文基于水文地質(zhì)學(xué)、流體力學(xué)、油田化學(xué)及測(cè)井解釋、多相流基礎(chǔ)理論等,通過(guò)研究氣體鉆井地層出水量影響因素、地層出水量計(jì)算模型的建立、吸水劑性能室內(nèi)評(píng)價(jià)實(shí)驗(yàn)、結(jié)合氣體鉆井實(shí)際工況,得出氣體鉆井工況下地層出水量預(yù)測(cè)模型和吸水劑類(lèi)型優(yōu)選方案。研究?jī)?nèi)容及成果如下： (1)總結(jié)分析了影響氣體鉆井地層出水的因素,將出水分為淺表層出水和中深層出水,得出了對(duì)應(yīng)出水層位的預(yù)測(cè)方法。 (2)以非穩(wěn)定滲流模型為基礎(chǔ),耦合地應(yīng)力變化,建立出水量動(dòng)態(tài)預(yù)測(cè)數(shù)學(xué)模型,得到了動(dòng)態(tài)出水量規(guī)律并通過(guò)實(shí)例計(jì)算驗(yàn)證模型準(zhǔn)確性。 (3)根據(jù)氣體鉆井實(shí)際工況,設(shè)計(jì)了適應(yīng)環(huán)空出水后環(huán)霧流及液流環(huán)境的實(shí)驗(yàn)方案,通過(guò)實(shí)驗(yàn)對(duì)比了工程中常用的6種超強(qiáng)吸水劑在抗鹽能力、抗酸堿性和抗溫、抗壓性能差別,為進(jìn)一步優(yōu)選提供理論依據(jù)。 本研究為氣體鉆井地層出水量預(yù)測(cè)及出水后吸水劑處理方法提供相應(yīng)理論和實(shí)驗(yàn)依據(jù),對(duì)氣體鉆井參數(shù)優(yōu)化及施工安全具有一定指導(dǎo)意義。
[Abstract]:Compared with conventional drilling, gas drilling has the advantages of fast drilling speed, preventing well leakage, protecting oil and gas layers and so on. It is more and more widely used in various oil fields. However, in the actual drilling operation, if the formation is out of water, it is easy to cause wellbore collapse. Complex accidents such as drilling jam restrict the scope of application of gas drilling. Therefore, it is one of the bottlenecks in popularizing and applying gas drilling technology to accurately predict the level of effluent, determine the amount of water produced and how to deal with it. Based on hydrogeology, hydrodynamics, oil field chemistry and logging interpretation, and basic theory of multiphase flow, this paper studies the influence factors of formation water output in gas drilling, the establishment of formation water output calculation model, the laboratory evaluation experiment of absorbent performance, and so on. Combined with the actual conditions of gas drilling, the prediction model of formation water output and the optimal selection scheme of absorbent type under gas drilling conditions are obtained. The research contents and results are as follows: (1) the factors affecting the effluent of gas drilling formation are summarized and analyzed, the effluent is divided into shallow surface water and middle deep layer water, and the prediction method of corresponding effluent layer is obtained. (2) based on the unstable seepage model and coupled with the variation of in-situ stress, the mathematical model of dynamic prediction of water output is established, and the accuracy of the model is verified by an example. (3) according to the actual conditions of gas drilling, the experimental scheme for the environment of annular mist flow and liquid flow after annular water extraction is designed. Through the experiments, six kinds of superabsorbent commonly used in engineering are compared in salt resistance, acid resistance, alkalinity resistance and temperature resistance. The difference of compressive performance provides theoretical basis for further optimal selection. This study provides theoretical and experimental basis for prediction of formation water output and treatment method of absorbent after gas drilling. It is of certain guiding significance for optimization of gas drilling parameters and construction safety.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TE24

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