本文選題：底水油藏　切入點(diǎn)：油溶性封堵劑　出處：《西安石油大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：本文依據(jù)底水油氣藏開(kāi)發(fā)過(guò)程中需要進(jìn)行壓裂以提高原油采收效率的現(xiàn)實(shí)需求,采用先期堵水以便于充分利用地層能量,并防止底水錐進(jìn)通道形成的堵水理念,選用容易攜帶和鋪置,可以減少液相和沉積物對(duì)儲(chǔ)層傷害的固體顆粒油溶性樹(shù)脂作為選擇性封堵劑,提出了油溶性封堵劑輔助控縫高壓裂堵底水工藝的設(shè)想用于底水油氣藏開(kāi)發(fā),以此為基礎(chǔ)研究該工藝在底水油氣藏開(kāi)發(fā)過(guò)程中的適應(yīng)性。油溶性封堵劑的室內(nèi)靜態(tài)實(shí)驗(yàn)表明,實(shí)驗(yàn)用油溶性封堵劑在不同攜帶液中無(wú)相互攢聚現(xiàn)象,分散性較好,易于攜帶,可以通過(guò)合理的攜帶工藝使之沉降形成人工隔層;實(shí)驗(yàn)用油溶性封堵劑的最佳油溶溫度為70°C,原油含蠟量越低,溶解時(shí)間越長(zhǎng),溶解度越高;油溶性封堵劑與地層水,酸液、堿液配伍性好,可以適應(yīng)于多種地層條件和工藝。室內(nèi)動(dòng)態(tài)導(dǎo)流實(shí)驗(yàn)表明,油溶性封堵劑和隔離劑所形成復(fù)合人工隔層的導(dǎo)流能力受到油溶性封堵劑與隔離劑的質(zhì)量配比,油藏溫度,以及油藏的含油飽和度等方面的影響。其中油藏溫度、油溶性封堵劑與隔離劑的質(zhì)量配比主要影響人工隔層的水相滲流能力,油藏含油飽和度主要影響人工隔層的油相滲流能力。通過(guò)對(duì)施工過(guò)程的討論,建議使用隔離劑與油溶性封堵劑間隔式交替注入的方式將其攜帶入地層;通過(guò)溫度場(chǎng)模擬確定所需油溶性封堵劑玻璃化溫度后進(jìn)行油溶性封堵劑類(lèi)型的選擇。通過(guò)建立的油溶性封堵劑與隔離劑所形成人工隔層存在條件下裂縫高度與驅(qū)替壓力的計(jì)算關(guān)系式,研究人工隔層厚度、油溶性封堵劑與隔離劑質(zhì)量配比對(duì)裂縫高度控制的影響。結(jié)果表明:在低油溶性封堵劑與隔離劑質(zhì)量配比條件下,人工隔層厚度的增加為縫高控制的主要因素。
[Abstract]:According to the practical demand of fracturing in the development of bottom water reservoir to improve the recovery efficiency of crude oil, this paper adopts the idea of water shutoff in advance to make full use of formation energy and to prevent the formation of bottom water coning channel. The oil soluble resin of solid particles, which can reduce the damage of liquid phase and sediment to reservoir, is selected as selective plugging agent. This paper puts forward the assumption that the oil-soluble plugging agent can be used in the development of the bottom water reservoir by using the oil-soluble plugging agent as the assistant to control the fracture and plugging at high pressure. On the basis of this, the adaptability of the process in the development of the oil-soluble oil and gas reservoir is studied. The laboratory static experiment of the oil-soluble plugging agent shows that, The experimental oil-soluble plugging agent has no mutual accumulation phenomenon in different carrier liquid, has good dispersibility and is easy to carry, and can be made to form artificial interlayer by reasonable carrying technology. The optimum oil soluble plugging agent is 70 擄C, the lower the wax content in crude oil, the longer the dissolution time, the higher the solubility, the better compatibility of oil soluble plugging agent with formation water, acid and lye. It can be adapted to a variety of formation conditions and techniques. The indoor dynamic flow diversion experiments show that the conductivity of the compound artificial barrier formed by oil soluble plugging agent and isolator is affected by the mass ratio of oil soluble plugging agent to isolator and reservoir temperature. And the oil saturation of the reservoir. The temperature of the reservoir, the mass ratio of the oil soluble plugging agent and the isolator mainly affect the water phase percolation ability of the artificial interlayer. The oil saturation of reservoir mainly affects the oil phase percolation ability of artificial interlayer. Through the discussion of construction process, it is suggested to carry it into the formation by the alternate injection of the spacer and the oil soluble plugging agent. The type of oil-soluble plugging agent was selected after vitrification temperature of oil-soluble plugging agent was determined by simulation of temperature field. Fracture height and displacement under the condition of artificial interlayer between oil-soluble plugging agent and isolator were established. For the calculation of pressure, The effects of artificial interlayer thickness and the mass ratio of oil soluble plugging agent and isolator on the control of fracture height are studied. The results show that under the condition of low oil soluble plugging agent and isolation agent mass ratio, The increase of the thickness of artificial septum is the main factor to control the seam height.
【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】：2017
【分類(lèi)號(hào)】：TE357

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本文編號(hào)：1582664