应用XYG-Ⅰ、Ⅱ化学剂改善超稠油蒸汽吞吐效果的研究
发布时间：2018-12-06 10:00
【摘要】：我国的稠油油藏类型多样,埋藏相对较深。近年来,随着各项开采技术和工艺的完善提升,深层超稠油区块的采出程度和动用程度及开发效果均得到了些许改善,但稠油油藏仍有巨大开采潜力。而目前,最常用的稠油开发方式为热采,即:蒸汽吞吐、蒸汽驱、火烧油层,随着技术的更迭,降粘剂也得到了较好的应用。但对于开采浅薄稠油油藏,热损失过多,以上技术在经济上不可行,由于稠油粘度较大,热水驱效果也很差。在对稠油油藏开发过程中的不断探索中发现,应用化学方法开采稠油油藏效果较好。但非混相驱试验、烟道汽试验、CO2吞吐、三相泡沫调剖、固体颗粒调剖、弱凝胶调剖等技术,无法有效解决超稠油油藏蒸汽吞吐开发的后期问题,为此,人们通过采取多样的封堵汽窜通道、控制蒸汽超覆、提高原油采收率的调剖技术等技术,来解决蒸汽超覆和汽窜现象造成的驱替波及系数小、采收率低、油藏动用程度差等问题。文章开发出了地层自生CO2技术,该技术是利用向地层注入化学药剂,再注入高温高压的蒸汽,通过化学反应,生成能够与原油混相或不混相的气体,一方面补充地层能量,提高助排效果;另一方面利用表面活性剂和其他药剂的作用,提高驱油效果;第三方面,根据油井的具体情况,调整配方,使气液两相形成稳定泡沫凝胶,从纵向上调整吸气剖面。增加周期产量,减缓周期油汽比递减。XYG-I增油助排剂在地层内分解可产生大量的CO2气体,辅助蒸汽吞吐起到了增油、助排的作用。在一定条件下,注汽时,该助排剂能分解为表面活性物质,且产生大量CO2气体,与地下流体、破乳剂配伍性良好,无任何腐蚀现象,并可改善油层动用程度,调整吸气剖面,延长油井生产周期,提高日产水平,成为了提高经济效益、改善蒸汽吞吐效果的有效措施。XYG-Ⅱ增油助剂是对现有调剖封窜技术的有力补充,不仅可以有效地起到调剖封窜的作用,还具有降粘、助排等功效,且不污染油层。具有比较理想的封窜、增产效果,为减缓超稠油高轮井的产量递减提供一条有效途径。
[Abstract]:Heavy oil reservoirs in China are of various types and relatively deep buried. In recent years, with the improvement of production technology and technology, the recovery degree, production degree and development effect of deep super heavy oil block have been improved slightly, but the heavy oil reservoir still has great exploitation potential. At present, the most commonly used way of heavy oil development is thermal recovery, that is, steam huff and puff, steam drive, burning oil layer, with the change of technology, viscosity reducer has been applied better. But for the shallow heavy oil reservoir, the heat loss is too much, the above technology is not feasible economically, because of the viscosity of heavy oil, the effect of hot water flooding is also very poor. In the continuous exploration of heavy oil reservoir development, it is found that the application of chemical method to the production of heavy oil reservoir is better. However, such techniques as immiscible phase flooding test, flue steam test, CO2 huff and puff, three-phase foam profile control, solid particle profile control and weak gel profile control cannot effectively solve the problems in the later stage of steam huff and puff development in ultra-heavy oil reservoirs. By adopting various techniques such as plugging steam channeling channels, controlling steam overcover and improving oil recovery profile control technology, this paper aims to solve the problem of low displacement sweep coefficient and low recovery efficiency caused by steam overcover and steam channeling. Poor reservoir production and other problems. In this paper, we have developed the formation CO2 technology, which is to inject chemical chemicals into the formation, then inject high temperature and high pressure steam, through chemical reaction, produce gas which can be mixed or immiscible with crude oil, on the one hand, replenish the formation energy. Improving the effect of drainage aid; On the other hand, the effects of surfactant and other agents are used to improve the oil displacement effect. Thirdly, according to the specific conditions of oil wells, the formula is adjusted to form a stable foam gel with gas-liquid two-phase, and the suction profile is adjusted longitudinally. Increasing the cycle production and slowing down the decline of the oil / steam ratio in the cycle. The decomposition of XYG-I oil and drainage aid in the formation can produce a large amount of CO2 gas, and the auxiliary steam huff and puff plays the role of increasing oil and assisting drainage. Under certain conditions, the exhaust aid can decompose into surface active substances and produce a large amount of CO2 gas. It has good compatibility with underground fluid and demulsifier without any corrosion phenomenon, and can improve the production degree of reservoir and adjust the suction profile. Prolonging the production cycle and increasing daily production level are effective measures to improve economic benefit and steam huff and puff effect. XYG- 鈪，
本文编号：2365858
[Abstract]:Heavy oil reservoirs in China are of various types and relatively deep buried. In recent years, with the improvement of production technology and technology, the recovery degree, production degree and development effect of deep super heavy oil block have been improved slightly, but the heavy oil reservoir still has great exploitation potential. At present, the most commonly used way of heavy oil development is thermal recovery, that is, steam huff and puff, steam drive, burning oil layer, with the change of technology, viscosity reducer has been applied better. But for the shallow heavy oil reservoir, the heat loss is too much, the above technology is not feasible economically, because of the viscosity of heavy oil, the effect of hot water flooding is also very poor. In the continuous exploration of heavy oil reservoir development, it is found that the application of chemical method to the production of heavy oil reservoir is better. However, such techniques as immiscible phase flooding test, flue steam test, CO2 huff and puff, three-phase foam profile control, solid particle profile control and weak gel profile control cannot effectively solve the problems in the later stage of steam huff and puff development in ultra-heavy oil reservoirs. By adopting various techniques such as plugging steam channeling channels, controlling steam overcover and improving oil recovery profile control technology, this paper aims to solve the problem of low displacement sweep coefficient and low recovery efficiency caused by steam overcover and steam channeling. Poor reservoir production and other problems. In this paper, we have developed the formation CO2 technology, which is to inject chemical chemicals into the formation, then inject high temperature and high pressure steam, through chemical reaction, produce gas which can be mixed or immiscible with crude oil, on the one hand, replenish the formation energy. Improving the effect of drainage aid; On the other hand, the effects of surfactant and other agents are used to improve the oil displacement effect. Thirdly, according to the specific conditions of oil wells, the formula is adjusted to form a stable foam gel with gas-liquid two-phase, and the suction profile is adjusted longitudinally. Increasing the cycle production and slowing down the decline of the oil / steam ratio in the cycle. The decomposition of XYG-I oil and drainage aid in the formation can produce a large amount of CO2 gas, and the auxiliary steam huff and puff plays the role of increasing oil and assisting drainage. Under certain conditions, the exhaust aid can decompose into surface active substances and produce a large amount of CO2 gas. It has good compatibility with underground fluid and demulsifier without any corrosion phenomenon, and can improve the production degree of reservoir and adjust the suction profile. Prolonging the production cycle and increasing daily production level are effective measures to improve economic benefit and steam huff and puff effect. XYG- 鈪，
本文编号：2365858
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