摘要
中国石化资源禀赋相对较差,围绕东部老区小规模隐蔽圈闭精细描述难、西部深层超深层碳酸盐岩孔缝洞储层成像刻画精度低、非常规领域一体化程度不高等重点领域的油气勘探开发难题,形成了单点高密度地震采集、以叠前逆时偏移成像(RTM)为核心的高精度成像、地震多属性分析以及叠前叠后储层反演等技术系列,有效提高了地震资料品质,助力稳油增气降本。东部老区主要目的层沙三段优势频带扩宽了20Hz以上,有效提高了隐蔽圈闭识别精度;四川盆地超深层生物礁储层预测结果与实钻吻合率达到93%;塔里木盆地顺北超深层断控储集体实现了量化描述,有效支撑了SHB4X、SHB8X等日产千吨井的部署;初步形成非常规领域地质物探工程一体化技术,中国石化率先探明了国内首个千亿方常压页岩气田。在取得勘探新成果的同时,中国石化地球物理勘探当前还面临着物探技术对勘探领域拓展和勘探部署支撑的力度不够;物探精度尚不能满足复杂地质目标识别的要求;装备软件“卡脖子”问题依然存在;技术集成和攻关合力不够等4个方面的挑战。展望未来,针对中国石化东部断陷盆地、深层超深层海相碳酸盐岩、中西部致密碎屑岩、山前带、非常规、海域、火成岩七大重点领域的油气勘探开发难题及物探技术需求,需要提升完善6项核心技术,支撑当前勘探开发;攻关研究5项关键技术,突破技术发展瓶颈;探索储备2项前沿技术,引领未来技术发展。
Sinopec's resource endowment is relatively poor.Various technologies have recently been proposed to improve the quality of seismic data,thereby addressing oil and gas exploration and exploitation issues in key fields,such as the challenging fine description of small-scale subtle traps in the eastern old oilfields,low imaging accuracy of deep and ultra-deep carbonate porous-fractured and cavernous reservoirs in the western oilfields,and low degree of integration in unconventional fields.These technologies include the single-sensor-based high-density seismic acquisition,high-precision imaging of prestack reverse time migration imaging,multi-attribute analysis,and prestack and poststack reservoir inversion.The dominant frequency band of the third member of the Shahejie Formation,that is,the main target layer in the old exploration area of the eastern oilfields,could be widened by more than 20Hz,leading to a significant improvement in the identification accuracy of subtle traps.Thus,the coincidence rate between predictions and drilling results for ultra-deep reef reservoirs in the Sichuan Basin reached 93%.The ultra-deep fault-controlled reservoirs in the Shunbei Tarim Basin were quantitatively analyzed,supporting the deployment of 1000 ton/day wells such as SHB4X and SHB8X.A technology integrating geological,geophysical,and engineering exploration methods for unconventional fields was established at Sinopec.Thus,Sinopec took the lead in exploring the first 1011 m3 of normal-pressure shale gas fields in China.Despite the exploration achievements,geophysical exploration activities at Sinopec are still facing four challenges:Ⅰ)technical support for expanding the exploration areas and subsequent well deployment are insufficient;Ⅱ)accuracy of current technologies is insufficient for identifying complex geological targets;Ⅲ)equipments and softwares are strangling the development;Ⅳ)integration among technologies is insufficient.Considering the aforementioned issues that condition the activities in seven key areas(namely the eastern rift basin,deep-ultra deep marine carbonate rock formations,dense clastic rock formations in central and western China,the piedmont belt,unconventional resources,the maritime space,and igneous rock formations),six core technologies should be improved in the future to support the exploration and exploitation;five key technologies should be studied to overcome the bottleneck in technological development;and two cutting-edge technologies should be developed to lead the future technological development.
作者
郭旭升
刘金连
杨江峰
赵锐
GUO Xusheng;LIU Jinlian;YANG Jiangfeng;ZHAO Rui(China Petrochemical Corporation,Beijing 100728,China;Sinopec Geophysical Research Institute,Nanjing 211103,China)
出处
《石油物探》
CSCD
北大核心
2022年第1期1-14,共14页
Geophysical Prospecting For Petroleum
基金
国家科技重大专项(2017ZX05036)资助。
关键词
高密度三维
高精度成像
油气勘探
需求分析
发展方向
high-density 3D seismic acquisition
high precision imaging
oil and gas exploration
demand analysis
development direction
