發(fā)布時(shí)間：2018-05-13 01:12

  本文選題：頁(yè)巖氣 + 壓裂��； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：我國(guó)頁(yè)巖氣資源潛力巨大,開(kāi)發(fā)前景極其誘人。壓裂改造是實(shí)現(xiàn)頁(yè)巖儲(chǔ)層有效開(kāi)發(fā)并保證長(zhǎng)期穩(wěn)定生產(chǎn)的最重要工程技術(shù)措施,目前開(kāi)發(fā)頁(yè)巖氣主要采用的滑溜水大型壓裂要消耗大量水資源并可能污染環(huán)境,而我國(guó)頁(yè)巖氣勘探的有利區(qū)域大部分處于山區(qū)、丘陵等重要缺水地區(qū)或鄰近區(qū)域,面臨著嚴(yán)峻的水資源約束及環(huán)保問(wèn)題,有必要開(kāi)展無(wú)水壓裂技術(shù)研究,為我國(guó)頁(yè)巖氣未來(lái)大規(guī)模高效開(kāi)發(fā)奠定基礎(chǔ)。本文對(duì)頁(yè)巖低分子烷烴無(wú)水壓裂液進(jìn)行了探索性研究,完成了以下工作： (1)以五氧化二磷、磷酸三乙酯等為原料合成出了膠凝劑磷酸酯,對(duì)膠凝劑磷酸酯進(jìn)行了電位滴定與表觀黏度測(cè)試評(píng)價(jià),優(yōu)選出膠凝劑磷酸酯的最優(yōu)合成條件,對(duì)最優(yōu)合成條件下磷酸酯的結(jié)構(gòu)進(jìn)行了紅外光譜和核磁共振波譜表征,證實(shí)合成樣品中的主要組分與設(shè)想一致。 (2)篩選出主劑Fe2(SO4)3、交聯(lián)促進(jìn)劑Jl和絡(luò)合劑L1,通過(guò)加量?jī)?yōu)化形成了復(fù)合交聯(lián)劑,獲得了復(fù)合交聯(lián)劑的最優(yōu)制備工藝條件。 (3)對(duì)交聯(lián)后的低分子烷烴無(wú)水壓裂液體系的配方進(jìn)行了優(yōu)化,得到了最佳交聯(lián)比和最佳膠凝劑濃度。測(cè)試了低分子烷烴無(wú)水壓裂液的交聯(lián)性能、耐溫耐剪切性能、攜砂性以及破膠性。測(cè)試表明,正戊烷烴基壓裂液在60℃、170s-1下連續(xù)剪切1.5h,黏度保持在100mPa·s以上；正己烷烴基壓裂液在90℃、170s-1下剪切1.5h,黏度保持在80mPa·s以上。 (4)分別對(duì)不同膠凝劑濃度和不同烷烴基液交聯(lián)后凍膠的流變特性進(jìn)行了測(cè)試分析,發(fā)現(xiàn)各交聯(lián)凍膠體系具有明顯的黏彈性、觸變性和剪切變稀性；最后利用非線性共轉(zhuǎn)Jeffreys本構(gòu)方程對(duì)各交聯(lián)凍膠體系的流動(dòng)曲線進(jìn)行了表征。 本文針對(duì)無(wú)水壓裂液研究具有開(kāi)創(chuàng)性,研究難度較大。論文成果將推進(jìn)無(wú)水壓裂液技術(shù)的進(jìn)步,為繼續(xù)完善形成具有工業(yè)應(yīng)用價(jià)值的無(wú)水壓裂液奠定了基礎(chǔ)。
[Abstract]:The shale gas in China has great potential and great development prospect . The fracturing transformation is one of the most important engineering measures to realize the effective development of shale reservoirs and guarantee the long - term stable production .

( 1 ) The phosphate ester was synthesized by using phosphorus pentoxide and triethyl phosphate as raw materials , and the potential titration and apparent viscosity test were carried out on the gelling agent phosphate ester . The optimal synthesis conditions of the phosphate ester were optimized . The structure of the phosphate ester under the optimum synthesis conditions was characterized by IR and NMR . It was confirmed that the main components in the synthesized sample were consistent with the assumption .

( 2 ) the main agent Fe2 ( SO4 ) 3 , the crosslinking accelerator Jl and the complexing agent L1 are screened , the composite cross - linking agent is formed by the addition amount optimization , and the optimal preparation process conditions of the composite cross - linking agent are obtained .

( 3 ) The formula of the crosslinked low molecular alkane anhydrous fracturing fluid system is optimized , the optimum crosslinking ratio and the optimum concentration of gelling agent are obtained . The cross - linking property , the temperature resistance , the shearing resistance , the sand carrying property and the gel breaking property of the low molecular alkane anhydrous fracturing fluid are tested . The test shows that the n - pentane - based fracturing fluid is continuously sheared for 1.5 hours at 60 DEG C and 170s - 1 , and the viscosity is kept above 100mPa & # xb7 ; s ;
The n - hexane hydrocarbon - based fracturing fluid was sheared for 1.5 h at 90.degree . C . , 170s - 1 , and the viscosity was maintained above 80 mPa & # xb7 ; s .

( 4 ) The rheological properties of the frozen glue after cross - linking of different gelling agents and different alkane groups were tested and analyzed . It was found that the cross - linked freeze - gel systems had obvious viscoelasticity , thixotropic and shear thinning ;
Finally , the flow curve of each cross - linked gel system was characterized by nonlinear corotation Jeffreys constitutive equation .

In this paper , the research of water - free fracturing fluid is very difficult to study . The results of this paper will advance the progress of anhydrous fracturing fluid technology and lay the foundation for the continuous improvement of the anhydrous fracturing fluid with industrial application value .

【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
【分類號(hào)】：TE357.12

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本文編號(hào)：1880978