【摘要】：地下儲(chǔ)氣庫(kù)在注采生產(chǎn)過(guò)程中水泥環(huán)將不斷承受交變應(yīng)力作用,由于地層、套管、水泥石的力學(xué)性能不同,在交變應(yīng)力和地層擠壓的作用下水泥環(huán)界面容易產(chǎn)生微環(huán)隙,導(dǎo)致環(huán)空帶壓。針對(duì)上述問(wèn)題,本文從對(duì)自愈合劑的研究入手,優(yōu)選與自愈合劑配套的其他添加劑,旨在開(kāi)發(fā)出具有自愈合效果的水泥漿體系；同時(shí)針對(duì)固井領(lǐng)域并無(wú)公認(rèn)的自愈合水泥漿體系自愈合能力評(píng)價(jià)方法這一情況將重點(diǎn)研究其自愈合能力評(píng)價(jià)方法。論文主要開(kāi)展的工作及研究成果如下： (1)研究出了一種能夠定量評(píng)價(jià)自愈合水泥漿體系自愈合能力的評(píng)價(jià)新方法及儀器。室內(nèi)模擬實(shí)驗(yàn)分析表明,該方法操作簡(jiǎn)單能夠更加準(zhǔn)確的定量的評(píng)價(jià)自愈合能力大小。 (2)論文對(duì)結(jié)晶型自愈合劑和熱熔型自愈合劑進(jìn)行了自愈合能力評(píng)價(jià)實(shí)驗(yàn),并進(jìn)行了自愈合劑的作用機(jī)理分析。 (3)基于水泥漿的基本性能要求,論文通過(guò)調(diào)研及室內(nèi)實(shí)驗(yàn),對(duì)與自愈合劑相配伍的添加劑進(jìn)行了優(yōu)選,優(yōu)選出了與結(jié)晶型自愈合劑相配伍的減阻劑SXY-2、降失水劑BS100L、膨脹劑BS500,以及與熱熔型自愈合劑相配伍的減阻劑FMA-1、降失水劑BXF-200L、膨脹劑BS500。 (4)論文根據(jù)優(yōu)選出的與自愈合劑相配伍的其他添加劑,通過(guò)室內(nèi)實(shí)驗(yàn)綜合分析,得出了兩種自愈合水泥漿配方。結(jié)晶型自愈合水泥漿配方：夾江G級(jí)水泥+0.75%分散劑SXY-2+4%降失水劑BS100L+2%膨脹劑BS500+5%懸浮穩(wěn)定劑WG+X%結(jié)晶型自愈合劑+0.2%消泡劑XP-1+水(密度：1.90g/cm3)。熱熔型自愈合水泥漿配方：夾江G級(jí)水泥+0.75%分散劑FMA-1+3%降失水劑BXF-200L+2%膨脹劑BS500+5%懸浮穩(wěn)定劑WG+X%自愈合劑+0.2%消泡劑XP-1+水(密度：1.90g/cm3)。 (5)對(duì)結(jié)晶型自愈合水泥漿體系及熱熔型自愈合水泥漿體系的常規(guī)性能以及自愈合性能進(jìn)行評(píng)價(jià),結(jié)晶型自愈合水泥漿體系及熱熔型自愈合水泥漿體系在75℃×0.1MPa水浴養(yǎng)護(hù)40天后對(duì)于1mm寬的裂縫,自愈合程度分別能達(dá)到78.8%和76.0%。
[Abstract]:During the production of underground gas storage, cement ring will be subjected to alternating stress continuously. Because of the different mechanical properties of stratum, casing and cement stone, the interface of cement ring is easy to produce microannulus under the action of alternating stress and stratum extrusion. Leading to annular band pressure. In view of the above problems, this paper starts with the research of self-healing agent, and optimizes the other additives of self-healing agent to develop the cement slurry system with self-healing effect. In view of the fact that there is no recognized self-healing ability evaluation method in cementing field, the evaluation method of self-healing ability of cement slurry system will be studied. The main work and research results are as follows: (1) A new method and instrument to evaluate the self-healing ability of self-healing cement slurry system has been developed. The laboratory simulation results show that this method can be used to evaluate the ability of self-healing more accurately and quantitatively. (2) the self-healing ability of crystallized self-healing agent and hot-melt self-healing agent were evaluated, and the mechanism of self-healing agent was analyzed. (3) based on the basic performance requirements of cement slurry, through investigation and laboratory experiments, the additives compatible with self-healing agent were selected, and the drag-reducing agent SXY-2, water loss reducing agent BS100L, which was compatible with crystallized self-healing agent, was selected. Expansion Agent BS500, and drag reducing Agent FMA-1, Water loss reducing Agent BXF-200L, Expander BS500. compatible with Hot melting Self-Healing Agent (4) two kinds of self-healing cement slurry formulations were obtained by comprehensive analysis of laboratory experiments according to other additives which were selected to match the self-healing agent. Crystallization self-healing cement slurry formula: Jiaojiang G grade cement 0.75% dispersant SXY-2 4% water loss agent BS100L 2% expansion agent BS500 5% suspension stabilizer WG X% crystallized self-healing agent 0.2% defoamer XP-1 water ( Density: 1.90g/cm3). Hot melt self-healing cement slurry formula: Jiaojiang G grade cement 0.75% dispersant FMA-1 3% water loss agent BXF-200L 2% expansion agent BS500 5% suspension stabilizer WG X% self-healing agent 0.2% defoamer XP-1 water Degree: 1.90g/cm3). (5) the conventional and self-healing properties of the crystallized self-healing cement slurry system and the hot-melt self-healing cement slurry system are evaluated. The self-healing degree of 1mm wide cracks in crystallized self-healing cement slurry system and hot-melt self-healing cement slurry system can reach 78.8% and 76.0% respectively after 40 days of curing at 75 鈩，

本文編號(hào)：2364615