带油环凝析气藏衰竭式开发中—后期提高采收率

doi:10.7657/XJPG20240411

新疆石油地质 ›› 2024, Vol. 45 ›› Issue (4): 470-474.doi: 10.7657/XJPG20240411

带油环凝析气藏衰竭式开发中—后期提高采收率

黄召庭¹^,²^,³(), 李春涛⁴, 汪斌¹^,²^,³, 乔霞¹^,²^,³, 付莹¹^,²^,³, 闫炳旭¹^,²^,³

1.中国石油塔里木油田分公司勘探开发研究院，新疆库尔勒 841000
2.中国石油天然气集团有限公司超深层复杂油气藏勘探开发技术研发中心，新疆库尔勒 841000
3.新疆维吾尔自治区超深层复杂油气藏勘探开发工程研究中心，新疆库尔勒 841000
4.中国石油新疆油田分公司勘探开发研究院，新疆克拉玛依 834000

收稿日期:2023-10-09 修回日期:2023-12-11 出版日期:2024-08-01 发布日期:2024-07-23
作者简介:黄召庭（1984-），男，贵州岑巩人，高级工程师，硕士，凝析气田开发，（Tel）0996-2172145（Email）huangzt-tlm@petrochina.com.cn
基金资助:
中国石油科技项目(2023ZZ04)

Enhanced Recovery in Middle and Late Stages of Depletion Development of Condensate Gas Reservoirs With Oil Ring

HUANG Zhaoting¹^,²^,³(), LI Chuntao⁴, WANG Bin¹^,²^,³, QIAO Xia¹^,²^,³, FU Ying¹^,²^,³, YAN Bingxu¹^,²^,³

1. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
2. R&D Center for Ultra-Deep Complex Reservior Exploration and Development, CNPC, Korla, Xinjiang, 841000, China
3. Xinjiang Engineering Research Center for Ultra-deep Complex Reservoir Exploration and Development, Korla, Xinjiang 841000, China
4. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China

Received:2023-10-09 Revised:2023-12-11 Online:2024-08-01 Published:2024-07-23

摘要/Abstract

摘要：

针对塔里木盆地Y5凝析气藏衰竭式开发过程中地层压力和气井产能快速降低、生产气油比逐渐下降、凝析油密度和黏度逐渐升高、开发效果迅速变差等问题，将生产动态特征与地层流体组分评价相结合，重新认识该气藏为带油环层状边水凝析气藏，并采用数值模拟方法确定其油环厚度。为改善开发效果，提高凝析油气采收率，系统开展带油环凝析气藏衰竭式开发中—后期提高采收率机理研究可知：完善井网、实施循环注气开发能大幅提高油气采收率，注入介质以二氧化碳最佳，气藏自产气次之；注气方式以重力辅助气驱模式最佳。基于气藏类型和提高采收率机理研究，编制了该气藏循环注气提高采收率方案，预测原油采收率较衰竭式开发提高29.96%。该气藏循环注气开发后累计注气0.19×10⁸ m³，地层压力恢复4.31 MPa，气井产能恢复到方案实施前的3.09倍，可为其他同类型气藏开发中—后期提高采收率提供借鉴。

关键词: 塔里木盆地, 凝析气藏, 油环, 开发中—后期, 循环注气, 提高采收率, 开发机理, 重力辅助气驱

Abstract:

The depletion development of Y5 condensate gas reservoir in the Tarim basin encounters the challenges such as rapid decline in both reservoir pressure and well productivity, gradual decrease in produced gas-oil ratio, increase in condensate oil density and viscosity, and fast downgrading of development performance. Combining performance analysis and reservoir fluid component evaluation, the Y5 condensate gas reservoir was redefined as a layered condensate gas reservoir with oil ring and edge water and the thickness of the oil ring was determined through numerical simulation. To improve the development performance and enhance the condensate oil/gas recovery, a systematic investigation was conducted on the mechanism of enhanced recovery in the middle and late stages of depletion development of the condensate gas reservoir with oil ring. It is found that optimizing the well pattern and implementing cyclic gas injection can significantly improve oil and gas recovery. Gravity-assisted gas drive is recommended, with CO₂ being the optimal injection medium, followed by reservoir gas. Based on reservoir type and enhanced recovery mechanism, a scheme of cyclic gas injection for enhancing the recovery of Y5 condensate gas reservoir was developed, with an expected oil recovery 29.96% higher than that of depletion development alone. Under this scheme, a cumulative gas volume of 0.19×10⁸ m³ was injected, the reservoir pressure restored by 4.31 MPa, and the well productivity increased by 3.09 times compared to that before the scheme was implemented. The research results provide valuable reference for enhancing recovery in the middle and late development stages of similar reservoirs.

Key words: Tarim basin, condensate gas reservoir, oil ring, middle-late development stage, cyclic gas injection, EOR, development mechanism, gravity-assisted gas drive

中图分类号:

TE357

黄召庭, 李春涛, 汪斌, 乔霞, 付莹, 闫炳旭. 带油环凝析气藏衰竭式开发中—后期提高采收率[J]. 新疆石油地质, 2024, 45(4): 470-474.

HUANG Zhaoting, LI Chuntao, WANG Bin, QIAO Xia, FU Ying, YAN Bingxu. Enhanced Recovery in Middle and Late Stages of Depletion Development of Condensate Gas Reservoirs With Oil Ring[J]. Xinjiang Petroleum Geology, 2024, 45(4): 470-474.

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特征参数	不同等级范围
特征参数	0	1	2	3	4	5
F₁	>125	100~125	75~100	50~75	25~50	0~25
F₂	>10	8~10	6~8	4~6	2~4	0~2
F₃	>6	5~6	4~5	3~4	2~3	1~2
F₄	>5.3	4.3~5.3	3.3~4.3	2.3~3.3	1.3~2.3	0.3~1.3

方案	井数/口	日产气量/ 10⁴ m³	预测最终采收率/%
方案	井数/口	日产气量/ 10⁴ m³	油	气
1	2	2	26.40	52.62
2	3	3	27.13	54.43
3	4	4	28.17	56.03
4	5	5	29.58	58.23

带油环凝析气藏衰竭式开发中—后期提高采收率

Enhanced Recovery in Middle and Late Stages of Depletion Development of Condensate Gas Reservoirs With Oil Ring

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