高3624块难采储量改善开发效果研究
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摘要
高3624块莲花油层为深层块状稠油油藏。针对区块油藏埋藏深、物性差、粘土矿物含量高等主要问题,从地质特征再认识入手,在剩余油分布规律研究基础上,开展粘土防膨、压裂及注汽参数优化等改善注汽效果研究工作,针对性提出压裂注汽、高压注汽、粘土防膨等措施,前期试验取得成功。在此基础上,对区块进行了整体二次开发部署,现场实施后,开发效果明显改善,日产油与采油速度显著提高,预计最终采收率将提高8个百分点。
Lianhua reservoir in Block Gao3624 is a deep massive heavy oil reservoir.The reservoir is deeply buried,has poor physical property and high content of clay mineral.This paper studies geological characteristics,residual oil distribution,and measures to improve steam injection effect,including clay antiswelling,fracturing and injection parameter optimization.Fracturing steam injection,high pressure injection and clay antiswelling are proposed and have been successful in preceding tests.On this basis,the whole block is deployed for secondary development.Development response has been improved obviously after field implementation;both daily oil production and oil recovery rate have improved notably.It is predicted that the ultimate recovery factor will improve by 8%.
Lianhua reservoir in Block Gao3624 is a deep massive heavy oil reservoir.The reservoir is deeply buried,has poor physical property and high content of clay mineral.This paper studies geological characteristics,residual oil distribution,and measures to improve steam injection effect,including clay antiswelling,fracturing and injection parameter optimization.Fracturing steam injection,high pressure injection and clay antiswelling are proposed and have been successful in preceding tests.On this basis,the whole block is deployed for secondary development.Development response has been improved obviously after field implementation;both daily oil production and oil recovery rate have improved notably.It is predicted that the ultimate recovery factor will improve by 8%.
引文
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[2]张厚福,等.石油地质学[M].北京:石油工业出版社,1999:128～139.
[3]霍进,等.油藏描述在稠油开发中的应用[J].特种油气藏,2007,14(1):22～26.
[4]郭平,等.复杂构造地震资料成像新技术的开发与应用[J].特种油气藏,2007,14(2):45～49.
[5]陈元千,等.现代油藏工程[M].北京:石油工业出版社,2004:34～77.
[6]窦宏恩,等.稠油蒸汽吞吐过程中加热半径与井网关系的新理论[J].特种油气藏,2006,13(1):58～59.
[7]时庚戌,等.辽河油田开发实例[C].北京:石油工业出版社,1994:124～128.
[8]张锐,等.稠油热采技术[M].北京:石油工业出版社,1999:114～168.
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