[1]冷　捷,杨　龙,张　露,等.低渗底水气藏水侵实验研究——以宁波19-6区块为例[J].复杂油气藏,2022,15(04):81-85.[doi:10.16181/j.cnki.fzyqc.2022.04.015]
　LENG Jie,YANG Long,ZHANG Lu,et al.Experimental study of water invasion in low permeability gas reservoirs with bottom water:A case study of NB19-6 Block[J].Complex Hydrocarbon Reservoirs,2022,15(04):81-85.[doi:10.16181/j.cnki.fzyqc.2022.04.015]
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低渗底水气藏水侵实验研究——以宁波19-6区块为例()
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
15卷
期数:
2022年04期
页码:
81-85
栏目:
油气开发
出版日期:
2023-02-01

文章信息/Info

Title:
Experimental study of water invasion in low permeability gas reservoirs with bottom water:A case study of NB19-6 Block
作者:
冷　捷; 杨　龙; 张　露; 蔺振宁; 洪　婧
中海油能源发展股份有限公司上海工程技术分公司，上海 200941
Author(s):
LENG Jie; YANG Long; ZHANG Lu; LIN Zhenning; HONG Jing
Shanghai Company of CNOOC Energy Development Limited，Shanghai 200941，China
关键词:
底水气藏; 水侵; 含气饱和度; X射线扫描
Keywords:
gas reservoirs with bottom water;  water invasion;  gas saturation;  X ray scanner
分类号:
TE377
DOI:
10.16181/j.cnki.fzyqc.2022.04.015
文献标志码:
A
摘要:
东海西湖凹陷已开发的气藏以水驱气藏为主，大部分气井投产后2～3 a开始出水，产量递减快。研究认为东海西湖凹陷低渗水驱气藏存在水侵影响。考虑到该凹陷不同气藏地质特征各异，储层渗透性及水体能量差异均较大，以宁波19-6区块为研究对象，开展了低渗（K＜10×10-3 μm2）和特低渗（K＜1×10-3 μm2）样品在不同水体大小及采出速度下气藏水侵特征模拟实验。结果表明，低渗储层气驱水过程束缚水饱和度普遍较高，气水两相渗流能力较差。通过X射线扫描，完成了不同水体大小及不同采出速度下低渗储层岩心水驱气沿程含气饱和度分布的实时监测，确定了水驱前缘。研究表明，相较于储层渗透率和水体倍数，采出速度是影响气藏采收率的决定性因素。研究成果对后续宁波19-6气田的高效开发具有一定的指导意义。
Abstract:
The developed gas reservoirs in the Xihu Sag of the East China Sea are mainly water-driven，and most of the gas wells start to produce water after 2 to 3 years of production with fast decreasing production. The study concluded that water intrusion exists in the low permeability water-driven gas reservoirs in the Xihu Sag of the East China Sea. Considering that the geological characteristics of different gas reservoirs in this sag are different，the reservoir permeability and water body energy vary greatly. Taking NB19-6 Block as the research object，the simulation experiments on water intrusion characteristics of gas reservoirs were carried out for low permeability （K < 10×10-3 μm2） and extra-low permeability （K < 1×10-3 μm2） samples under different water body sizes and different production rates. The results show that the irreducible water saturation of the gas flooding process in low permeability reservoirs is generally high and the gas-water two-phase percolation capacity is poor. The real-time monitoring of the distribution of gas-containing saturation along the water-driven gas in the core of low permeability reservoirs with different water body sizes and different production rates was completed by X ray scanning，and the leading edge of water-driven gas was determined. The study shows that the recovery rate is a decisive factor affecting the recovery rate of gas reservoirs compared to reservoir permeability and water body multiples. The results of the study have some guiding significance for the subsequent efficient development of the NB19-6 Gasfield.

参考文献/References:

［1］朱文娟，杨志兴，黄导武，等.西湖凹陷低渗储层水的赋存状态及出水特征研究［J］.石油地质与工程，2017，31（2）:91-93.
［2］高瑞民.核磁共振测试天然气藏可动气体饱和度［J］.天然气工业，2006，26（6）:33-35.
［3］高树生.川中须家河组低渗砂岩气藏渗流规律及开发机理研究［M］.北京:石油工业出版社，2011.
［4］廖恒杰，杨志兴，李元生，等.西湖凹陷气藏出水规律及控制因素［J］.岩性油气藏，2017，29（6）:135-141.
［5］方飞飞，李熙喆，高树生，等.边、底水气藏水侵规律可视化实验研究［J］.天然气地球科学，2016，27（12）:2246-2252.
［6］方飞飞，刘华勋，肖前华，等.非均质气藏水侵规律物理模拟实验研究［J］.实验室研究与探索，2019，38（3）:85-89.
［7］沈伟军，李熙喆，刘晓华，等.裂缝性气藏水侵物理模拟研究［J］.中南大学学报（自然科学版），2014，45（9）:3283-3287.
［8］刘华勋，任东，高树生，等.边、底水气藏水侵机理与开发对策［J］.天然气工业，2015，35（2）:47-53.
［9］焦春艳，朱华银，胡勇，等.底水气藏水侵物理模拟实验与数学模型［J］.科学技术与工程，2014，14（10）:191-194.

备注/Memo

备注/Memo:
收稿日期：2021-12-09；改回日期：2022-01-14。
第一作者简介：冷捷（1992—），硕士，工程师，现从事开发实验研究工作。E-mail：lengjie@cnooc.com.cn。
更新日期/Last Update: 2022-12-25