海上低渗透油藏挖潜技术及其应用

Stimulation technology and its application to the low-permeability reservoir in offshore fields

苏崇华

SU Chong-hua

西南石油大学, 四川成都 610500 中海石油中国有限公司湛江分公司, 广东湛江 524057

Southwest Petroleum University, Chengdu 610500, Sichuan, China Zhanjiang Branch of CNOOC Limited, Zhanjiang 524057, Guangdong, China

为了对低渗透难动用储量进行开发,在文昌13-2油田ZJ1-1、ZJ1-3、ZJ1-7L油组,文昌13-1油田ZJ1-4U油组实施了钻长水平井技术提高产能;内挂井槽解决了海上平台空间、平台资源有限与实施挖潜的矛盾;对产能进行评价并优选开发井位及确定合理井距;运用电潜泵进行深抽采油,新增动用储量800×104 m3左右,累计日增油950 m3,指导了文昌15-1油田主力层ZJ1-4油组、文昌14-3油田ZH1-2等油组的开发。实践证明该套技术适合海上低渗透率油藏挖潜,为其他类似油藏的开发做了技术准备。

Stimulation technique of drilling long horizontal wells was conducted to enhance deliverability in the low-permeability reservoirs in Wenchang13-2 oil field which consisted of ZJ1-1,ZJ1-3,ZJ1-7L formations and Wenchang13-1 field which of ZJ1-4U formation.The internal hanging well slots overcome the problems of limited platform space and application of well stimulation.Flow potential was evaluated and well location was optimized while rational spacing between wells was defined.Electric pump was used to deep draw oil,which adds new reserves of more than 800×104 m3 and daily amount of 950 m3.This technique contributes useful references to the development of ZJ1-4 series in Wenchang15-1 oil field and ZH1-2 series in Wenchang14-3 oil field.Practice show that this technique is fit for the low-permeability reservoir stimulation in the offshore field.

10.3969/j.issn.1000-7393.2007.06.024