本文選題：漏失 + 吸水樹脂��； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：鉆井液漏失問題是長期存在于鉆井作業(yè)中并且一直未能得到較好解決的技術(shù)難題。目前現(xiàn)場常用堵漏材料多存在形變能力差、吸水膨脹能力小等缺陷,在處理井漏問題時易造成堵漏效果不佳或堵漏成功后易發(fā)生重復(fù)性漏失問題。近年來,國內(nèi)外開發(fā)出了多種堵漏材料,但這些材料針對大孔隙型、高溫、高礦化度地層水等復(fù)雜地層漏失堵漏效果不太理想。為彌補現(xiàn)有堵漏材料的缺陷,本文研制了吸水樹脂堵漏劑DLJ-1。 基于吸水樹脂吸水機理的分析,結(jié)合堵漏劑分子結(jié)構(gòu)的設(shè)計思路,選用AM、AMPS兩種單體進行聚合；通過正交試驗和單因素實驗對反應(yīng)條件進行優(yōu)選,確定了該堵漏劑的最優(yōu)合成條件。 堵漏劑DLJ-1的顆粒粒徑主要分布在0.2-2.0mmm之間,較小的粒徑使得其具有較快的吸液膨脹速率,達到吸液平衡所時間較短。DLJ-1堵漏劑的加量在1%時對鉆井液的性能影響較小,失水性能表現(xiàn)良好,對縫板封堵有一定的效果；承壓堵漏實驗結(jié)果顯示,連續(xù)性加壓堵漏劑能承受壓力,一次性承壓實驗?zāi)艹惺?MPa壓力仍保持漏失很少,防漏堵漏效果明顯。通過溫度、壓力、pH、礦化度對加入DLJ-1的鉆井液后堵漏效果的影響表明pH對DLJ-1的堵漏效果影響不大,在5NaCl、0.5%CaCl2、50%地層水中都具有較好的堵漏效果。 本論文在對吸水樹脂堵漏劑吸水原理、合成機理及性能研究的基礎(chǔ)上,研制出一種在鉆井液中堵漏效果明顯,承壓能力較好的堵漏劑DLJ-1。并結(jié)合DLJ-1堵漏劑的具體情況,對其堵漏機理進行了分析。
[Abstract]:Drilling fluid leakage is a technical problem which has existed in drilling operation for a long time and has not been well solved. At present, the commonly used plugging materials have some defects such as poor deformation ability and small water absorption and expansion ability, which can easily lead to poor plugging effect or repeatable leakage problem after successful plugging. In recent years, many kinds of leakage plugging materials have been developed at home and abroad, but the leakage and plugging effect of these materials is not ideal for complex formation such as macroporous type, high temperature, high salinity formation water and so on. In order to make up for the defects of the existing plugging materials, the water absorbent resin plugging agent DLJ-1 has been developed in this paper. Based on the analysis of water absorption mechanism of absorbent resin and the design idea of molecular structure of plugging agent, amps and amps were selected for polymerization, and the reaction conditions were optimized by orthogonal test and single factor experiment. The optimum synthetic conditions of the plugging agent were determined. The particle size of the plugging agent DLJ-1 is mainly distributed in the range of 0.2-2.0mmm, and the smaller particle size makes it have a faster liquid swelling rate, and when the time to achieve the liquid absorption equilibrium is shorter. The amount of DLJ-1 plugging agent has little effect on the performance of drilling fluid when the amount of DLJ-1 plugging agent is 1. The experimental results show that the continuous pressure plugging agent can withstand the pressure, the one-off pressure experiment can withstand 7MPa pressure and the leakage loss is little, and the leakage prevention effect is obvious. The effect of temperature, pressure, pH and salinity on the plugging effect of drilling fluid added DLJ-1 shows that pH has little effect on the plugging effect of DLJ-1, and it has better plugging effect in 5NaCl2, 0.5Cl2 + 50% formation water. Based on the study of water absorption principle, synthesis mechanism and properties of water absorbent resin plugging agent, a new plugging agent DLJ-1 was developed, which has obvious plugging effect and good pressure bearing ability in drilling fluid. Combined with the specific situation of DLJ-1, the plugging mechanism of DLJ-1 was analyzed.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE28

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本文編號：2011192