高含水期油藏剩余油聚集度表征方法

doi:10.7657/XJPG20230607

新疆石油地质 ›› 2023, Vol. 44 ›› Issue (6): 690-695.doi: 10.7657/XJPG20230607

高含水期油藏剩余油聚集度表征方法

赵晨云¹(), 窦松江²(), 窦煜², 柳朝阳¹, 黄博¹, 王振宇¹, 李刚¹

1.延长油田股份有限公司勘探开发技术研究中心，陕西延安 716001
2.中国石油大港油田分公司勘探开发研究院，天津 300280

收稿日期:2022-09-06 修回日期:2023-03-17 出版日期:2023-12-01 发布日期:2023-11-29
通讯作者: 窦松江（1966-），男，天津人，教授级高级工程师，博士，开发地质，（Tel）13602122950（Email）dsj196612@sina.com
作者简介:赵晨云（1972-），男，陕西延安人，高级工程师，硕士，采油工程，（Tel）13772851116（Email）3274142350@qq.com
基金资助:
中国石油科技重大专项(2018E-11-06)

A New Method for Characterizing Remaining Oil in High Water-Cut Reservoirs

ZHAO Chenyun¹(), DOU Songjiang²(), DOU Yu², LIU Chaoyang¹, HUANG Bo¹, WANG Zhenyu¹, LI Gang¹

1. Research Center of Exploration and Development Technology, Yanchang Oilfield Co., Ltd., Yan’an, Shaanxi 716001, China
2. Research Institute of Exploration and Development, Dagang Oilfield Company, PetroChina, Tianjin 300280, China

Received:2022-09-06 Revised:2023-03-17 Online:2023-12-01 Published:2023-11-29

摘要/Abstract

摘要：

剩余油聚集度是评价高含水期油藏开发效果及开发潜力的重要指标。通过剩余油储量丰度，确定油藏优势储量区；利用单块面积、分布密度和形状指数，通过熵权法确定各指标的权重，最终形成剩余油聚集度的表征。研究表明，对于一个稳定开发的油藏，开发过程中剩余油的离散与聚集可分为一次离散阶段、迅速分离阶段、波动聚集与离散阶段和二次离散阶段。利用表征指标对大港油田港东开发区二区七断块Nm3-4-1小层进行评价，该小层剩余油聚集度随着开发的进行稳步下降，现阶段由于注采结构和井网调整，剩余油聚集度开始上升。

关键词: 高含水期, 熵权法, 剩余油聚集度, 剩余油团块属性, 形状指数, 注采井网, 分布密度, 采收率

Abstract:

Remaining oil aggregation is a key indicator for evaluating the recovery effect and potential of high water-cut reservoirs. In this study, the dominant reserves zones within the reservoir are determined based on remaining reserves abundance. The weights of indicators are determined with the entropy weight method by using block area, distribution density and shape index. Finally, the remaining oil aggregation is characterized. The results show that, for a reservoir under steady development, the dispersion and accumulation of remaining oil can be divided into four stages: primary dispersion, rapid separation, fluctuating accumulation and dispersion, and secondary dispersion. Utilizing these characterization indicators, an evaluation was conducted on the Nm3-4-1 layer in No.7 fault block in Block 2 of the East Dagang Development Area, Dagang oilfield. The results show that the remaining oil aggregation in Nm3-4-1 decreased steadily with the progress of development, and it starts to rise owing to injection-production structure and well pattern adjustments.

Key words: high water-cut, entropy weight method, remaining oil, aggregation, shape index, injection-production pattern, distribution density, recovery factor

中图分类号:

TE345

赵晨云, 窦松江, 窦煜, 柳朝阳, 黄博, 王振宇, 李刚. 高含水期油藏剩余油聚集度表征方法[J]. 新疆石油地质, 2023, 44(6): 690-695.

ZHAO Chenyun, DOU Songjiang, DOU Yu, LIU Chaoyang, HUANG Bo, WANG Zhenyu, LI Gang. A New Method for Characterizing Remaining Oil in High Water-Cut Reservoirs[J]. Xinjiang Petroleum Geology, 2023, 44(6): 690-695.

图/表 6

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高含水期油藏剩余油聚集度表征方法

A New Method for Characterizing Remaining Oil in High Water-Cut Reservoirs

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