低渗稠油油藏热化学复合驱油体系实验
发布时间:2018-12-31 13:52
【摘要】:叙利亚O油田Sh-B油藏为典型的低渗稠油油藏,具有埋藏深、渗透率低、原油黏度大等特点,蒸汽吞吐注汽难,注汽质量差。针对这些问题,开展了低渗稠油热化学复合体系室内研究,筛选、复配了适合该油藏稠油的油溶性降黏剂、高温驱油剂,并评价了伴注CO2、高温驱油剂和油溶性降黏剂在低渗稠油开发中的效果及其可行性。结果表明,添加降黏剂能使降黏率达到78%以上,高温驱油剂显著降低界面张力,注入CO2能够明显改善O油田稠油开采效果,150℃条件下热化学复合体系最终驱替效率达到91.65%。热化学复合体系能够显著改善低渗稠油油藏开发效果,提高油藏采收率,为国内外低渗稠油油藏开发提供借鉴。
[Abstract]:The Sh-B reservoir of Syria O oilfield is a typical low permeability heavy oil reservoir with the characteristics of deep burial, low permeability, high viscosity of crude oil, difficult steam injection and poor steam injection quality. In order to solve these problems, the laboratory study of thermochemical complex system of low permeability heavy oil was carried out, and the oil soluble viscosity reducer and high temperature oil displacement agent suitable for heavy oil reservoir were selected, and the CO2, was evaluated. The effect and feasibility of high temperature oil displacement agent and oil soluble viscosity reducer in the development of low permeability heavy oil. The results show that the viscosity reduction rate can reach more than 78% by adding viscosity reducer, and the interfacial tension can be significantly reduced by high temperature oil displacement agent. Injection of CO2 can obviously improve the recovery effect of heavy oil in O oilfield. The final displacement efficiency of the thermochemical composite system is 91.65 at 150 鈩,
本文编号:2396669
[Abstract]:The Sh-B reservoir of Syria O oilfield is a typical low permeability heavy oil reservoir with the characteristics of deep burial, low permeability, high viscosity of crude oil, difficult steam injection and poor steam injection quality. In order to solve these problems, the laboratory study of thermochemical complex system of low permeability heavy oil was carried out, and the oil soluble viscosity reducer and high temperature oil displacement agent suitable for heavy oil reservoir were selected, and the CO2, was evaluated. The effect and feasibility of high temperature oil displacement agent and oil soluble viscosity reducer in the development of low permeability heavy oil. The results show that the viscosity reduction rate can reach more than 78% by adding viscosity reducer, and the interfacial tension can be significantly reduced by high temperature oil displacement agent. Injection of CO2 can obviously improve the recovery effect of heavy oil in O oilfield. The final displacement efficiency of the thermochemical composite system is 91.65 at 150 鈩,
本文编号:2396669
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