本文選題：鉆井液　切入點：成膜劑　出處：《長江大學》2015年碩士論文

【摘要】：由于西部地區(qū)油氣儲層埋藏較深,地層具有高溫高壓的特點,因此一直使用的是聚磺鉆井液體系。該體系雖然在抗高溫、流變性能、適應性等方面具有十分突出的優(yōu)點,但是它的防塌、防漏、抑制性以及儲層保護性能卻非常差。其中保護油氣層工作的好壞關系到新油氣田的發(fā)現(xiàn)、油氣井產量和油田的經濟效益,所以提高聚磺鉆井液的儲層保護性能就顯得十分重要。在鉆井液的儲層保護技術中,國內外常采用屏蔽暫堵技術,但該技術要求暫堵粒子尺寸必須與地層孔喉相匹配,而這種匹配很難把握,并且適應性很差,從而使得保護油氣層的效果不理想。本文針對傳統(tǒng)暫堵技術的不足,提出了暫堵劑和成膜劑協(xié)同增效保護油氣層技術。通過室內流變性實驗、中壓濾失實驗和中壓砂床侵入實驗,篩選出了具有良好封堵能力、井眼穩(wěn)定能力、保護油氣層效果的暫堵劑DSZD和成膜劑CMJ-1和BST-D,并且確定出了三者的最佳復配比例。將本文研制的BHJ(三種處理劑復配而成)加入聚磺鉆井液后,測得的暫堵率和巖心滲透率恢復值都達到了90%以上,與西部典型聚磺屏蔽暫堵體系相比提高了20-40%。研究還表明新儲層保護劑BHJ具有快速自適應封堵油氣層的特點,所形成的屏蔽膜在生產壓差下也極容易清除。筆者通過文獻調研和砂心試片的可視化研究,總結出了新儲層保護劑BHJ主要是通過化學吸附、鑲嵌和架橋封堵等作用,協(xié)同形成致密的屏蔽膜保護油氣層的。
[Abstract]:Because the oil and gas reservoirs in the western region are deeply buried and have the characteristics of high temperature and high pressure, the polysulfonated drilling fluid system has been used all the time.Although the system has outstanding advantages in high temperature resistance, rheological properties and adaptability, its sloughing, leakage prevention, inhibition and reservoir protection performance are very poor.The protection of oil and gas reservoir is related to the discovery of new oil and gas field, the production of oil and gas well and the economic benefit of oil field, so it is very important to improve the reservoir protection performance of polysulfonated drilling fluid.In the reservoir protection technology of drilling fluid, shielding temporary plugging technology is often used at home and abroad, but this technology requires that the particle size of temporary plugging must match with formation pore throat, and this matching is very difficult to grasp, and the adaptability is very poor.As a result, the effect of protecting oil and gas reservoir is not ideal.Aiming at the deficiency of traditional temporary plugging technology, this paper puts forward the synergistic technology of temporary plugging agent and film forming agent to protect oil and gas reservoir.Through laboratory rheological experiment, medium pressure filtration test and medium pressure sand bed invasion experiment, the good plugging ability and borehole stability were obtained.The temporary plugging agent DSZD and the film forming agents CMJ-1 and BST-Dare used to protect the reservoir effect, and the optimum proportion of the three is determined.When the BHJ (three kinds of treating agents) is added into the polysulfonate drilling fluid, the temporary plugging rate and core permeability recovery value are all over 90%, which is 20-40% higher than that of the typical temporary plugging system of polysulfonation shielding in the west of China.The study also shows that the new reservoir protectant BHJ has the characteristics of fast self-adaptive sealing of oil and gas reservoirs, and the shielding film formed is also very easy to clear under the production pressure difference.By means of literature investigation and visualization of core samples, it is concluded that the new reservoir protectant BHJ is mainly formed by chemical adsorption, mosaic and bridge sealing to protect oil and gas reservoir with dense shielding film.
【學位授予單位】：長江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE254

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本文編號：1714021