【摘要】：酸壓改造工藝是碳酸鹽巖儲(chǔ)藏增產(chǎn)及穩(wěn)產(chǎn)的主導(dǎo)技術(shù)之一,但在深層、超深層碳酸鹽巖儲(chǔ)層酸壓施工過(guò)程中,常規(guī)交聯(lián)酸耐溫耐剪切能力不足,且過(guò)早交聯(lián)造成酸液體系在管道中長(zhǎng)時(shí)間剪切,使到達(dá)地層的酸液粘度過(guò)低,極大地影響了酸壓施工效果。本文重點(diǎn)研制一種新型交聯(lián)酸體系,提高體系耐溫耐剪切性能,并使其具有延緩交聯(lián)性,解決酸壓施工在深層、超深層碳酸鹽巖儲(chǔ)層應(yīng)用中的諸多問(wèn)題。通過(guò)優(yōu)選實(shí)驗(yàn),確定了基本酸種類(lèi),以及稠化劑種類(lèi)與加量。以氧氯化鋯、多元醇、醇胺、多羥基羧酸為原料,合成了一種新型有機(jī)鋯交聯(lián)劑JLJ-11。通過(guò)比較凍膠強(qiáng)度及交聯(lián)時(shí)間,對(duì)JLJ-11的制備工藝進(jìn)行了優(yōu)化。實(shí)驗(yàn)結(jié)果表明:當(dāng)水:多羥基羧酸B:醇胺A:八水合氧氯化鋯:多元醇F質(zhì)量比為1:1:2:2:3,反應(yīng)時(shí)間為3h,反應(yīng)溫度為70℃時(shí),合成的酸凍膠具有延緩交聯(lián)性,且耐溫性能較好。在此基礎(chǔ)上,通過(guò)向體系中加入緩蝕劑、鐵離子穩(wěn)定劑、助排劑、破膠劑等酸液添加劑,并通過(guò)優(yōu)選,得到了新型交聯(lián)酸的最終配方:0.8%稠化劑FS3802+1.0%交聯(lián)劑JLJ-11+2.0%酸液緩蝕劑HJF-10+1.0%鐵離子穩(wěn)定劑TWJ-10+1.0%助排劑CF-5A+0.1%破膠劑PC330。為進(jìn)一步提高交聯(lián)酸耐溫耐剪切性能,在得到新型交聯(lián)酸體系的基礎(chǔ)上,將其與納米SiO_2混合使用,得到交聯(lián)酸納米顆粒復(fù)合體系。通過(guò)對(duì)納米材料的優(yōu)選試驗(yàn),確定選用親水型HDK?氣相SiO_2,型號(hào)為T(mén)30,加量為0.5%。通過(guò)對(duì)比實(shí)驗(yàn),分析納米材料的加入對(duì)體系耐溫耐剪切性、延緩交聯(lián)性的影響,實(shí)驗(yàn)結(jié)果表明:納米顆粒的加入雖對(duì)延緩交聯(lián)性沒(méi)有明顯影響,但是顯著提高了體系的耐溫耐剪切性能,復(fù)合體系在150℃、170s-1條件下,持續(xù)剪切1h后粘度仍高于50mPa·s。實(shí)驗(yàn)參考行業(yè)標(biāo)準(zhǔn)對(duì)交聯(lián)酸納米顆粒復(fù)合體系進(jìn)行綜合性能評(píng)價(jià)。實(shí)驗(yàn)結(jié)果表明:復(fù)合體系配伍性較好,具有優(yōu)越的懸砂性能,濾失系數(shù)小、緩蝕率高、緩速性能顯著,同時(shí)破膠徹底,破膠液粘度低,無(wú)殘?jiān)?符合酸壓現(xiàn)場(chǎng)施工相關(guān)要求。
[Abstract]:Acid fracturing transformation technology is one of the leading technologies for carbonate storage and stable production, but in the process of acid fracturing construction of deep and ultra-deep carbonate reservoirs, the temperature and shear resistance of conventional crosslinked acid is insufficient. The premature cross-linking results in the long time shear of the acid system in the pipeline, which makes the viscosity of the acid liquid arriving in the formation too low, which greatly affects the construction effect of acid fracturing. In this paper, a new type of crosslinked acid system is developed to improve the temperature and shear resistance of the system, and to make it have the ability of delaying cross-linking, so as to solve many problems in the application of acid fracturing in deep and ultra-deep carbonate reservoirs. Through the optimal selection experiment, the basic acid type, as well as the type and dosage of thickener were determined. A new type of organic zirconium crosslinker JLJ-11. was synthesized from zirconium oxychloride, polyol, alkylamine and polyhydroxycarboxylic acid. The preparation process of JLJ-11 was optimized by comparing gel strength and cross-linking time. The experimental results show that when the mass ratio of water: polyhydroxycarboxylic acid B: alkylamine A: zirconium chloride octahydrate: polyol F is 1 鈮，

本文編號(hào)：2478414