發(fā)布時(shí)間：2018-09-02 06:30

【摘要】：油井鉆井后,在井壁和套管壁上會(huì)形成一定厚度的、強(qiáng)度較差的泥餅。泥餅的存在引起井壁和套管壁與水泥漿之間無(wú)法良好固化膠結(jié),最終導(dǎo)致固井界面膠結(jié)強(qiáng)度下降,嚴(yán)重影響固井質(zhì)量。本文以改善泥餅性能、提高油井固井質(zhì)量為目的,以提高泥餅強(qiáng)度、改善泥餅與水泥石的相容性為出發(fā)點(diǎn),以泥餅在水泥濾液中的硬化機(jī)理為理論基礎(chǔ),研究了一種有效增加泥餅強(qiáng)度的泥餅改性方法(GX),檢驗(yàn)了GX方法對(duì)泥餅的改性效果及對(duì)固井界面膠結(jié)強(qiáng)度的增強(qiáng)效果,并分析了GX法的泥餅改性機(jī)理。主要研究結(jié)果如下:1.通過(guò)分析養(yǎng)護(hù)溫度、養(yǎng)護(hù)時(shí)間、水泥濾液中離子對(duì)泥餅的作用過(guò)程,結(jié)合粘土的水化機(jī)理建立了水泥濾液對(duì)泥餅的作用機(jī)制模型。研究發(fā)現(xiàn):養(yǎng)護(hù)溫度越高,養(yǎng)護(hù)時(shí)間越長(zhǎng),泥餅強(qiáng)度越大;水泥濾液中,Ca~(2+)、CO32-、OH-三種離子對(duì)泥餅有不同程度的增強(qiáng)作用,其中Ca~(2+)在堿性條件下可使泥餅強(qiáng)度增大到空白泥餅的707倍;水泥濾液增強(qiáng)泥餅的機(jī)制模型為:水泥濾液促進(jìn)泥餅內(nèi)部生成凝膠類(lèi)物質(zhì),該物質(zhì)將分散的粘土顆粒膠連在一起,同時(shí)生成的碳酸鈣、氫氧化鈣、硅酸鈣等物質(zhì)一部分填充在粘土顆粒間,增大了粘土的抗壓力,另一部分包覆在粘土顆粒的表面,減小了粘土的水化膨脹量,進(jìn)而提高泥餅強(qiáng)度。2.以泥餅在水泥濾液中的硬化模型為基礎(chǔ),研究了一種有效改善泥餅性質(zhì)的方法(GX),并對(duì)其作用機(jī)理進(jìn)行了研究。研究發(fā)現(xiàn):GX法可使搬土漿和現(xiàn)場(chǎng)漿的泥餅強(qiáng)度分別提高到原來(lái)的32倍和38倍,泥餅性能得到顯著改善;GX方法應(yīng)用于現(xiàn)場(chǎng)漿可使模擬固井一、二界面的膠結(jié)強(qiáng)度分別增大到10.58倍和17.54倍;GX方法中泥餅的硬化-活化機(jī)理為:硬化劑LXAB首先在粘土顆粒層間進(jìn)行骨架支撐,提高泥餅抵抗地層壓力的能力,然后活化劑中QX-1破壞粘土表面的Si-O-Si、Al-O-Al、Si-O-Al鍵,打開(kāi)泥餅孔道,并生成游離硅,接下來(lái)QX-2將游離硅相互結(jié)合并形成凝膠物質(zhì),粘結(jié)粘土顆粒,最后利用QX-3誘導(dǎo)水泥濾液中的離子進(jìn)入泥餅內(nèi)部,進(jìn)一步生成大量C-S-H凝膠、氫氧化鈣、碳酸鈣等物質(zhì),這些類(lèi)似水泥水化產(chǎn)物物質(zhì)的生成,增加了泥餅的致密度,提高了泥餅強(qiáng)度,改善了泥餅與固井水泥的相容性。
[Abstract]:After drilling, a certain thickness of mud cake is formed on the well wall and casing wall. Due to the existence of mud cake, the cementing strength of the cementing interface decreases and the cementing quality is seriously affected by the failure of solidification between the well wall and the casing wall and the cement slurry. The purpose of this paper is to improve the performance of mud cake and the cementing quality of oil well, to improve the strength of mud cake, to improve the compatibility between mud cake and cement stone, and to take the hardening mechanism of mud cake in cement filtrate as the theoretical basis. A mud cake modification method, (GX), which can effectively increase the strength of mud cake, was studied. The modification effect of GX method on mud cake and cementing strength at cementing interface was tested. The mechanism of mud cake modification by GX method was analyzed. The main results are as follows: 1. Based on the analysis of curing temperature, curing time and the action process of ions on mud cake in cement filtrate, the mechanism model of cement filtrate acting on mud cake was established in combination with the hydration mechanism of clay. It is found that the higher the curing temperature, the longer the curing time, the greater the strength of mud cake, and the more enhanced the mud cake is by three kinds of ions (Ca2 ~ (2) CO32-OH-) in cement filtrate. Ca~ (2) can increase the strength of mud cake to 707 times that of blank cake under alkaline condition, and the mechanism model of cement filtrate enhancing mud cake is that cement filtrate can promote the formation of gel material inside the cake, which connects the dispersed clay particles together. The formation of calcium carbonate, calcium hydroxide, calcium silicate and other substances partly filled between clay particles, increased clay pressure resistance, the other part coated on the surface of clay particles, reducing the amount of clay hydration expansion, Therefore, the strength of mud cake was increased by 2. 2. Based on the hardening model of mud cake in cement filtrate, an effective method for improving the properties of mud cake, (GX), was studied and its mechanism was studied. It is found that the mud cake strength of the lifting slurry and the field slurry can be increased by 32 times and 38 times of the original mud cake strength, respectively. The performance of mud cake can be significantly improved by using the GX method in the field slurry to simulate cementing. The cementing strength of the two interfaces is increased to 10.58 times and 17.54 times respectively. The hardening and activation mechanism of the mud cake in the GX method is as follows: the hardener LXAB first carries out skeleton support between the clay particles to improve the clay cake's ability to resist formation pressure. Then the QX-1 in the activator breaks the Si-O-Si,Al-O-Al,Si-O-Al bond on the clay surface, opens the mud cake hole, and generates free silicon. Then QX-2 binds the free silicon to form the gel material, which binds the clay particles. Finally, QX-3 was used to induce the ions in the cement filtrate to enter into the mud cake and to produce a large amount of C-S-H gel, calcium hydroxide, calcium carbonate and other substances, which were similar to the formation of cement hydration products, which increased the density of the mud cake. The strength of mud cake is improved and the compatibility of mud cake and cementing cement is improved.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TE254

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 區(qū)穗輝;;大直徑泥水盾構(gòu)穿越硬塑狀粉質(zhì)粘土層防治泥餅技術(shù)[J];科技展望;2017年02期

2 王楠男;;水基鉆井液成膜機(jī)理及成膜效果研究[J];化工管理;2017年01期

3 崔云海;;固井二界面泥餅固化劑與水泥漿濾液的反應(yīng)機(jī)理[J];鉆井液與完井液;2016年02期

4 張健偉;王鑒;李欣;孟慶明;祝寶東;;泥餅質(zhì)量改進(jìn)劑及其對(duì)固井質(zhì)量的影響[J];硅酸鹽通報(bào);2016年02期

5 王皇鋒;;水泥水化過(guò)程的機(jī)理、測(cè)試及影響因素研究[J];化工管理;2015年26期

6 陳懷成;錢(qián)春香;趙飛;曲軍;郭景強(qiáng);Michael Danzinger;;聚羧酸系減水劑對(duì)水泥水化產(chǎn)物的影響[J];東南大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年04期

7 彭小芹;蘭聰;王淑萍;眭世玉;曾路;;水化硅酸鈣粉體對(duì)水泥水化反應(yīng)過(guò)程及機(jī)理的影響[J];建筑材料學(xué)報(bào);2015年02期

8 劉文慧;陳強(qiáng);黃治華;董昆;王立召;;鉆井液泥餅清除技術(shù)研究[J];內(nèi)蒙古石油化工;2014年17期

9 陳松;劉汝生;王起才;;普通硅酸鹽水泥水化熱影響因素試驗(yàn)研究[J];鐵道建筑;2014年06期

10 徐加放;孫澤寧;劉洪軍;付顯威;孫中富;李小迪;;分子模擬無(wú)機(jī)鹽抑制蒙脫石水化機(jī)理[J];石油學(xué)報(bào);2014年02期

相關(guān)會(huì)議論文 前1條

1 何育榮;彭志剛;王紹先;肖x";;礦渣MTC固化體開(kāi)裂的原因分析及解決途徑研究[A];山東石油學(xué)會(huì)鉆井專(zhuān)業(yè)委員會(huì)論文集[C];2005年

相關(guān)博士學(xué)位論文 前1條

1 王斌斌;固井水泥漿流變特性研究與應(yīng)用[D];中國(guó)石油大學(xué);2011年

相關(guān)碩士學(xué)位論文 前9條

1 杜江;鉆井廢棄泥漿固化處理技術(shù)研究[D];西安石油大學(xué);2016年

2 于洪蘇;界面增強(qiáng)劑對(duì)二界面固井質(zhì)量的影響研究[D];吉林大學(xué);2014年

3 何吉標(biāo);固井二界面泥餅活化機(jī)理研究[D];中國(guó)地質(zhì)大學(xué);2014年

4 孫立全;改善固井質(zhì)量的界面增強(qiáng)劑的研制[D];東北石油大學(xué);2014年

5 彭陳亮;煤泥水中微細(xì)蒙脫石顆粒表面水化作用機(jī)理研究[D];安徽理工大學(xué);2013年

6 劉浩亞;固井二界面水泥漿—泥餅?zāi)z結(jié)網(wǎng)絡(luò)結(jié)構(gòu)作用機(jī)制研究[D];中國(guó)地質(zhì)大學(xué);2012年

7 李彬;固井水泥石界面膠結(jié)性能改善方法研究[D];哈爾濱工業(yè)大學(xué);2011年

8 國(guó)安平;低密礦渣MTC體系研究[D];中國(guó)石油大學(xué);2010年

9 石秉忠;新型鉆井固井一體化工作液技術(shù)研究[D];中國(guó)石油大學(xué);2009年

，

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