【摘要】：有機(jī)鹽鉆井液具有流變性好、抑制性強(qiáng)、造壁性好、保護(hù)油氣層效果好的優(yōu)點(diǎn),對(duì)鉆具無(wú)腐蝕、對(duì)環(huán)境污染小、相對(duì)成本不高,在庫(kù)車山前鉆井中得到大量運(yùn)用并取得明顯成效。 有機(jī)鹽鉆井液的運(yùn)用,在帶來(lái)快速優(yōu)質(zhì)鉆井、保護(hù)環(huán)境、降低鉆井成本的同時(shí),卻給固井帶來(lái)新的挑戰(zhàn)。經(jīng)大量實(shí)驗(yàn)驗(yàn)證,有機(jī)鹽鉆井液與現(xiàn)有的水泥漿相容性極差,只要水泥漿與有機(jī)鹽鉆井液直接接觸,將發(fā)生較嚴(yán)重的污染。本文的研究目的是優(yōu)選相互適配的隔離液與水泥漿體系；同時(shí),分析水泥漿與鉆井液的污染機(jī)理,研究降低污染的工藝措施途徑,從而提高固井質(zhì)量。 本文對(duì)塔里木克深區(qū)塊3套水泥漿、隔離液和2套鉆井液體系,從流變性、稠化時(shí)間、抗壓強(qiáng)度、固相懸浮及膠凝程度和失水量多方面進(jìn)行了相容性測(cè)試,并分析了三者接觸污染的原因。通過(guò)對(duì)鉆井液外加劑紅外光譜掃描分析,分析鉆井液外加劑所具有的官能團(tuán)對(duì)水泥水化性能的影響。為進(jìn)一步分析產(chǎn)生污染的原因,用掃描電子顯微鏡觀察其微觀形貌,對(duì)污染不同階段的水泥石結(jié)構(gòu)進(jìn)行分析。最后通過(guò)加入降污染劑解決水泥漿與有機(jī)鹽鉆井液的污染問(wèn)題。研究結(jié)果對(duì)保障固井施工安全和提高固井質(zhì)量具有重要的意義。研究結(jié)果如下。 (1)山前構(gòu)造有機(jī)鹽鉆井液與水泥漿接觸污染現(xiàn)象顯著,體系B的水泥漿、隔離液與有機(jī)鹽鉆井液的相容性較好； (2)有機(jī)鹽鉆井液中的抗鹽抗高溫降濾失劑是影響鉆井液與水泥漿接觸污染的主要因素,需要進(jìn)一步優(yōu)化有機(jī)鹽鉆井液中的降濾失劑； (3)降污染劑B的降污染效果最好。
[Abstract]:Organic salt drilling fluid has the advantages of good rheology, strong inhibition, good wall-building and good effect of protecting oil and gas reservoirs. It has no corrosion to drilling tools, less environmental pollution and low relative cost. In front of the Kuqa mountain drilling has been widely used and achieved obvious results. The application of organic salt drilling fluid not only brings fast and high quality drilling, but also brings new challenges to cementing while protecting environment and reducing drilling cost. A large number of experiments show that the compatibility of organic salt drilling fluid with existing cement slurry is very poor. As long as the cement slurry and organic salt drilling fluid are in direct contact, serious pollution will occur. The purpose of this paper is to optimize the suitable isolation liquid and cement slurry system, at the same time, to analyze the pollution mechanism of cement slurry and drilling fluid, and to study the technological measures to reduce the pollution, so as to improve the cementing quality. In this paper, the compatibility of three sets of cement slurry, isolation liquid and two sets of drilling fluid systems in Keshen block of Tarim Basin has been tested from the aspects of Rheology, thickening time, compressive strength, solid suspension and cementitious degree and water loss. The causes of contact pollution among them were also analyzed. The effect of functional groups of drilling fluid admixture on hydration properties of cement was analyzed by infrared spectrum scanning analysis of drilling fluid admixture. In order to further analyze the causes of pollution, the microstructure of cement paste was observed by scanning electron microscope (SEM), and the structure of cement paste in different stages of pollution was analyzed. Finally, the pollution problem of cement slurry and organic salt drilling fluid was solved by adding pollution reducing agent. The research results are of great significance to ensure the safety of cementing operation and improve the cementing quality. The results are as follows. The main results are as follows: (1) the contact pollution phenomenon between organic salt drilling fluid and slurry in Piedmont structure is remarkable, and the compatibility of system B cement slurry and isolation fluid with organic salt drilling fluid is better; (2) the salt-resistant and high-temperature filtration reducer in organic salt drilling fluid is the main factor affecting the contact pollution between drilling fluid and cement slurry, so it is necessary to further optimize the filtrate reducer in organic salt drilling fluid. (3) the pollution reduction effect of B is the best.
【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)】：TE256

【參考文獻(xiàn)】

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本文編號(hào)：2472746