深埋潜山强挥发性油藏注气开发油藏工程优化设计

姜永; 张雷; 郑华; 杨晨旭; 黄磊

doi:10.3969/j.issn.1006-6535.2025.03.013

特种油气藏 >

2025 , Vol. 32 >Issue 3: 111 - 118

DOI: https://doi.org/10.3969/j.issn.1006-6535.2025.03.013

油藏工程

深埋潜山强挥发性油藏注气开发油藏工程优化设计

姜永 ,
张雷 ,
郑华 ,
杨晨旭 ,
黄磊

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中海石油(中国)有限公司天津分公司,天津 300459

姜永(1985—),男,高级工程师,2009年毕业于长江大学应用数学专业,2012年毕业于该校矿产普查与勘探专业,获硕士学位,现主要从事试井、油藏工程研究工作。

收稿日期: 2023-11-06

修回日期: 2025-01-29

网络出版日期: 2025-07-08

基金资助

中海石油(中国)有限公司重大专项“渤海中深层复杂油气藏高效开发技术”(CNOOC-KJ135 ZDXM36TJ03TJ)

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Optimized design of reservoir engineering for gas injection development in deeply buried hill reservoirs with strong volatility

JIANG Yong ,
ZHANG Lei ,
ZHENG Hua ,
YANG Chenxu ,
HUANG Lei

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CNOOC (China) Tianjin Company, Tianjin 300459, China

Received date: 2023-11-06

Revised date: 2025-01-29

Online published: 2025-07-08

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摘要

渤海海域BZ-A油田为罕见的强挥发性变质岩潜山油藏,储层具有厚度大、低孔低渗、非均质性强、裂缝随机分布且倾角较大等特点,注采井网部署是实现油田高效开发急需解决的重要问题。为此,结合BZ-A油藏流体及储层发育特征,建立了双重介质油藏组分模型,开展了注气开发立体井网部署策略研究,定量分析了注气开发井网关键影响因素与裂缝发育耦合的关系。结果表明:BZ-A油藏宜采用伴生气回注补充能量开发,充分利用构造位置及重力辅助驱油机理部署注采井网;构造高部位顶部注气,低部位中下部采油,形成空间立体井网。采用采油井与裂缝方向呈45°夹角大斜度井开发,增大泄油面积,提高了单井产能;沿裂缝方向最优注采井距为1 000 m左右,垂直裂缝方向合理井距为800 m左右,高峰期采油速度为3%,注气开发采收率为28.4%;研究成果应用于BZ-A潜山油田开发实践,油井初期产能达到132~340 m³/d,取得较好的开发成效。研究成果对潜山油气田的开发方案编制和注气高效开发具有借鉴意义。

关键词： 潜山; 裂缝; 强挥发性油藏; 注气开发; 井网; 注采井距

本文引用格式

姜永 , 张雷 , 郑华 , 杨晨旭 , 黄磊 . 深埋潜山强挥发性油藏注气开发油藏工程优化设计[J]. 特种油气藏, 2025 , 32(3) : 111 -118 . DOI: 10.3969/j.issn.1006-6535.2025.03.013

Abstract

The BZ-A oil reservoir in the Bohai Sea is a rare highly volatile metamorphic rock buried hill reservoir.The reservoir is characterized by thick layers,low porosity and permeability,strong heterogeneity,randomly distributed fractures, and large fracture dip angles.The deployment of injection and production well networks is an important issue that needs to be urgently addressed for the efficient development of the oil field.To this end,a dual-medium reservoir compositional model was established based on the fluid and reservoir development characteristics of the BZ-A oil reservoir.A study on the deployment strategy of three-dimensional well networks for gas injection development was conducted,and a quantitative analysis of the key influencing factors of gas injection development well networks and their coupling relationship with fracture development was performed.The results show that the BZ-A oil reservoir is suitable for development with associated gas reinjection to supplement energy,making full use of the structural position and gravity-assisted oil displacement mechanism for the deployment of injection and production well networks.Gas is injected at the top of the high structural positions, while oil is produced from the middle and lower parts of the low structural positions,forming a spatial three-dimensional well network.The development method using highly-deviated wells with a 45° angle to the fracture direction is adopted, which increases the oil drainage area and enhances the single-well production capacity.The optimal injection-production well spacing along the fracture direction is approximately 1 000 m,and the reasonable well spacing perpendicular to the fracture direction is approximately 800 m.The oil production rate during the peak period is 3%, and the recovery rate for gas injection development is 28.4%.The research findings have been applied to the development practice of the BZ-A buried hill oilfield,where the initial production capacity of oil wells ranges from 132 to 340 m³/d,achieving good development results.The research results are of reference significance for the preparation of development plans and efficient gas injection development of buried hill oil and gas fields.

Key words： buried hill; fracture; highly volatile reservoir; gas injection development; well network; injection-production well spacing

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