摘要
琼东南盆地深水区中央峡谷是勘探成熟区,已发现陵水17-2、陵水25-1等多个气田,但气田开发存在经济门槛高、部分气田储量动用难度大的问题,必须围绕气田内部及周边开展潜力目标搜索。本文借鉴海上勘探开发一体化目标搜索技术,补充地球物理预测技术,建立了琼东南盆地深水勘探成熟区目标搜索技术体系,包括区带潜力目标搜索、随钻跟踪过程目标搜索和评价过程目标搜索等3项技术,其中区带潜力目标搜索是分析成熟区地质成藏条件,应用地球物理预测技术,指导开展目标搜索。随钻跟踪过程目标搜索是与开发井进行钻前、随钻及钻后相结合,在其周边搜索目标,并与待开发气层兼探评价,达到快速建产。评价过程目标搜索是在成熟区周边开展老井复查,探寻油气“蛛丝马迹”。在上述技术体系指导下,围绕陵水17-2、陵水25-1气田内部及周边搜索多个潜力目标。优选陵水25-1W构造并部署评价井LS 25-1W-1井,取得了很好的实施效果,有效促进了后续气田开发调整。
The central canyon in the deep water area of Qiongdongnan basin is a mature exploration area where several large gas fields such as the LS17-2 and LS25-1 have been found.However,in terms of the development of gas fields in deep water area,there are problems such as high economic threshold and difficulty in the development of unused reserves,therefore potential target search should be carried out in and around the gas fields.In this paper,by referring to the integrated target search technology for offshore exploration&development,and complementing it by the geophysical prediction technology,the technology system for target search in deep water mature exploration area of Qiongdongnan basin is established,which consists of“regional potential target search”,“target search with drilling tracking”and“target search with target evaluation”.The“regional potential target search”is a technology to analyze the geological reservoir conditions of mature areas and apply geophysics reservoir controlling mechanism to guide the target search.The“target search with drilling tracking”is a technology to search targets around development wells before,while and after drilling,with appraisal conducted along with the gas reservoir to be developed simultaneously,to achieve rapid production.The“target search with target evaluation”is a technology to search for“clues”of oil and gas by old well review around the mature area.Under the guidance of such technical system,search of potential targets have been conducted in and around LS17-2 gas field and LS25-1 gas field.By optimizing LS25-1W structure and deploying Well LS25-1W-1 as the appraisal well,such technical system has achieved a good implementation effect,which effectively promotes the subsequent development and adjustment of gas fields.
作者
陈奎
杨希冰
胡林
李明
李安琪
王真真
李凤霞
李夏露
CHEN Kui;YANG Xibing;HU Lin;LI Ming;LI Anqi;WANG Zhenzhen;LI Fengxia;LI Xialu(CNOOC China Limited,Zhanjiang Branch,Zhanjiang,Guangdong 524057,China)
出处
《中国海上油气》
CAS
CSCD
北大核心
2020年第3期33-42,共10页
China Offshore Oil and Gas
基金
“十三五”国家科技重大专项“琼东南盆地深水区大中型气田形成条件及勘探关键技术(编号:2016ZX05026-002)”部分研究成果。
关键词
琼东南盆地
深水区
勘探成熟区
区带潜力目标搜索技术
随钻跟踪过程目标搜索技术
评价过程目标搜索技术
陵水25-1W构造
Qiongdongnan basin
deep water area
mature exploration area
regional target search technology
target search with drilling tracking technology
target search with target evaluation technology
LS25-1W structure