[1]李廷礼,高振南,党胜国,等.一种考虑层间干扰的多层合采油藏水驱采收率预测方法[J].复杂油气藏,2023,16(02):204.[doi:10.16181/j.cnki.fzyqc.2023.02.015]
 LI Tingli,GAO Zhennan,DANG Shengguo,et al.A water flooding recovery prediction method for multi-layer combined production reservoir considering inter-layer interference[J].Complex Hydrocarbon Reservoirs,2023,16(02):204.[doi:10.16181/j.cnki.fzyqc.2023.02.015]
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一种考虑层间干扰的多层合采油藏水驱采收率预测方法()
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
16卷
期数:
2023年02期
页码:
204
栏目:
油气开发
出版日期:
2023-06-25

文章信息/Info

Title:
A water flooding recovery prediction method for multi-layer combined production reservoir considering inter-layer interference
作者:
李廷礼高振南党胜国耿志刚杜春晓
中海石油(中国)有限公司天津分公司,天津 300459
Author(s):
LI TingliGAO ZhennanDANG ShengguoGENG ZhigangDU Chunxiao
CNOOC China Limited Tianjin Branch,Tianjin 300459,China
关键词:
多层油藏渗透率级差黏度级差层间干扰渗流阻力开发层系水驱采收率
Keywords:
multi-layer reservoirpermeability differenceviscosity differenceinter-layer interferenceseepage resistancedevelopment layerwater flooding recovery
分类号:
TE341
DOI:
10.16181/j.cnki.fzyqc.2023.02.015
文献标志码:
A
摘要:
考虑层间干扰研究多层合采油藏各层水驱采收率变化规律,对制定油田开发调整政策具有重要意义。联合Buckley-Leverett水驱理论和Welge水驱方程,推导了考虑层间渗流阻力干扰的多层合采油藏水驱采收率计算方法。该方法通过各层渗流阻力差异体现层间干扰程度即注入端各层吸水量系数值,针对各层的注入量采用水驱油理论和物质平衡原理建立水驱采收率计算式,循环迭代计算各小层的渗流阻力、吸水量和水驱指标(含水饱和度、含水率、水驱波及系数及采收率),可以预测各小层水驱采收率与累积注入量关系。该方法应用于渤海QHD油田高含水期开发调整,首次在海上采取大规模水平井联合定向井分层系开发模式,通过实施开发调整,各主力层采油速度由0.5%~0.8%提高至1.9%~2.2%,采收率由10.4%~22.4%提高至26.5%~37.9%,极大改善了油田开发效果。应用实例表明,该方法计算简便且具有较高的准确性和实用性,可真实反映多层合采油藏水驱过程中高、中、低渗层(低、中、高黏层)之间的干扰程度及其对水驱采收率的影响。
Abstract:
It is important to study the change law of water flooding recovery rate of each layer in a multi-layer co-production reservoir considering inter-layer interference for the formulation of oilfield development adjustment policy. Based on the Buckley-Leverett water flooding theory and the Welge water flooding equation,it was derived the calculation method of water flooding recovery rate for multi-layer combined reservoirs considering the inter-layer seepage resistance interference. The method reflects the degree of inter-layer interference through the difference in seepage resistance of each layer,i.e.,the value of the water absorption coefficient of each layer at the injection end. The calculation formula of the water-driven recovery rate is established by using the water-driven oil theory and material balance principle for the injection amount of each layer,and the seepage resistance,water absorption volume,and water-driven index (water saturation,water cut,water flooding swept efficiency and oil recovery rate) of each small layer are calculated by cyclic iteration,which can predict the relationship between water-driven recovery rate and cumulative injection amount of each small layer. This method was applied to the development adjustment of the QHD Oilfield in the Bohai Sea during the high water cut period. For the first time,the development mode of large-scale horizontal wells combined with directional wells was adopted offshore. Through the implementation of development adjustment,the oil recovery rate of each main formation was increased from 0.5%-0.8% to 1.9%-2.2% and the recovery factor was increased from 10.4%-22.4% to 26.5%-37.9%,which greatly improved the oilfield development effect. The application example shows that the method is easy to calculate and has high accuracy and practicality,and can truly reflect the interference degree among high,medium,and low permeability layers (low,medium and high viscosity layers)in the waterflooding process of multi-layer combined reservoir and its influence on the recovery rate of waterflooding.

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备注/Memo

备注/Memo:
收稿日期:2022-06-02;
改回日期:2022-07-12。
第一作者简介: 李廷礼(1978—),高级工程师,主要从事海上油气田开发综合研究工作。
E-mail:litl@cnooc.com.cn。
基金项目:“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)。
更新日期/Last Update: 2023-06-25