一种低渗碳酸盐岩气藏气井积液的早期判识方法

doi:10.3969/j.issn.1672-9803.2023.02.010

录井工程 ›› 2023, Vol. 34 ›› Issue (2): 57-64.doi: 10.3969/j.issn.1672-9803.2023.02.010

一种低渗碳酸盐岩气藏气井积液的早期判识方法

谢姗^①,②, 徐文^①,②, 焦扬^①,②, 薛云龙^①,②, 李琳^①,②

①中国石油长庆油田分公司勘探开发研究院;
②低渗透油气田勘探开发国家工程实验室

收稿日期:2023-02-11 出版日期:2023-06-25 发布日期:2023-07-12
作者简介:谢姗高级工程师,1987年生,2012年毕业于中国地质大学（北京）油气田开发工程专业,现在中国石油长庆油田分公司勘探开发研究院主要从事气藏动态监测与分析、试井、数值模拟研究等工作。通信地址：710018 陕西省西安市未央区长庆兴隆园小区勘探开发研究院。电话：（029）86978143。E-mail：xies_cq@petrochina.com.cn
基金资助:
中国石油天然气集团有限公司重大科技专项“长庆油田5 000万吨持续高效稳产关键技术研究与应用”（编号：2016E-0509）

Early identification method of gas well liquid accumulation in low-permeability carbonate gas reservoir

XIE Shan^①,②, XU Wen^①,②, JIAO Yang^①,②, XUE Yunlong^①,②, LI Lin^①,②

①Research Institute of Exploration and Development,PetroChina Changqing Oilfield Company, Xi′an,Shaanxi 710021, China;
②National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi′an , Shaanxi 710021, China

Received:2023-02-11 Online:2023-06-25 Published:2023-07-12

摘要/Abstract

摘要： 岩溶风化壳型低渗碳酸盐岩气藏受沉积成岩作用影响,储层非均质性强,一旦含水,开发难度极大。以鄂尔多斯盆地靖边气田为例,目前该类气藏整体进入开发中后期,因现有方法判识滞后且精度较低,气井气液流动状态难以及时准确识别,面临单井产量低、气井积液产水等问题,造成剩余储量动用难、气藏采收率低。根据低渗碳酸盐岩气藏渗流机理与生产特征,提出了基于常规生产资料的井筒积液早期判识技术,并在此基础上改进了积液产水气井生产制度以及气水动态分布预测技术思路,细化了“动态控水、地质避水”的剩余储量动用策略。靖边气田据此实施了“气水流动状态判识+生产制度动态优化+气水分布预测”的一体化技术流程,使老井控水、新井防水能力切实提升,典型产水单元水气比趋于稳定、连续生产气井比例提升20%,近3年年均增产气量1.8×10⁸ m³,年均提高采收率0.1%。

关键词: 积液判识, 生产制度优化, 气水分布预测, 含水气藏, 提高采收率, 靖边气田, 碳酸盐岩气藏

Abstract: Affected by sedimentary diagenesis, the weathering karst crust type of low-permeability carbonate gas reservoir shows developmental difficulties when facing strong heterogeneity and water production. Taking the Jingbian gas field in Ordos Basin as an example, the facing key difficulties, such as low production rate, liquid loading and water production, make existing methods fail to timely and accurate identify gas-liquid flowing status within the middle and late stages of development, which all affect reserves utilization and gas recovery. Therefore, the early identification technology of wellbore liquid loading based on conventional production data is proposed according to flow mechanics and production features in low-permeability carbonate gas reservoir. Furthermore, the technical ideas of production system optimization of liquid and gas-water dynamic distribution prediction are improved, then the development strategy of remaining reserves of "dynamic water control and geological water avoidance" is refined. The applicable results show that, Jingbian gas field has improved the water control ability and the waterproof ability by circulating the integrated technical process of "gas water flow state identification+production system dynamic optimization+gas water distribution prediction". The typical water-gas ratio of water production unit tends to be stable, and the proportion of continuous production gas wells increases by 20%. The average annual gas production increase in recent three years is 1.8×10⁸ m³ and the average EGR is 0.1% per year for whole gas field.

Key words: identification of early liquid loading, optimization of production system, prediction of gas-water distribution, the water-bearing gas reservoir, EGR, Jingbian gas field, carbonate gas reservoir

中图分类号:

TE132.1

谢姗, 徐文, 焦扬, 薛云龙, 李琳. 一种低渗碳酸盐岩气藏气井积液的早期判识方法[J]. 录井工程, 2023, 34(2): 57-64.

XIE Shan, XU Wen, JIAO Yang, XUE Yunlong, LI Lin. Early identification method of gas well liquid accumulation in low-permeability carbonate gas reservoir[J]. Mud Logging Engineering, 2023, 34(2): 57-64.

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一种低渗碳酸盐岩气藏气井积液的早期判识方法

Early identification method of gas well liquid accumulation in low-permeability carbonate gas reservoir

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