碳酸盐岩油藏酸化时机及效果分析  

Analysis on the timing and effect of acidification incarbonate reservoirs

作　　者：唐莎莎 皮建 李长勇 TANG Shasha;PI Jian;LI Changyong(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;State Key Laboratory of Offshore Oil Exploitation,Beijing 100028,China;CNOOC International Limited,Beijing 100027,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]海洋石油高效开发国家重点实验室,北京100028 [3]中国海洋石油国际有限公司,北京100027

出　　处：《石油化工应用》2021年第5期33-35,57,共4页Petrochemical Industry Application

基　　金：“十三五”国家科技重大专项“海外重点油气田开发钻采关键技术”资助,项目编号:2017ZX05032-004-002。

摘　　要：油田开发过程中油藏压力、温度等变化会导致原油中沥青质析出并沉积,对储层造成伤害从而使油井产能降低。本文以中东M油田为例,利用油井生产数据分析,明确了判断自喷油井沥青影响时机的方法;定量表征沥青对PI的影响程度;对孔隙型碳酸盐岩油藏自喷井酸化效果进行了评价。研究成果为存在沥青污染问题的油田开发提出了短期有效的开发对策:根据拐点及压力区间,利用有机酸化有效地解决沥青污染问题,并对同类型油藏措施选井具有借鉴意义。The pressure and temperature change of the reservoir in the process of oilfield development will lead to the precipitation and deposition of asphaltene in crude oil,which will cause damage to the reservoir and reduce the productivity of oil wells.This paper takes M oilfield in the Middle East as an example,and makes use of the analysis of oil well production data to define the method of determining the influence time of bitumen from natural flowing well for the first time,the influence degree of asphalt on PI was quantitatively characterized for the first time,the acidification effect of natural flowing well in porous carbonate reservoir is evaluated for the first time.The research results put forward short-term and effective development countermeasures for the development of oilfields with the problem of asphalt pollution.According to the inflection point and pressure interval,organic acidification can be used to effectively solve the problem of asphalt pollution,and it has reference signifi cance for the well selection of similar reservoir measures.

关 键 词：碳酸盐岩 沥青沉淀 影响因素 酸化时机 酸化效果 

分 类 号：TE344[石油与天然气工程—油气田开发工程]