摘要
渤海油田太古界变质岩潜山储层形成过程复杂,受构造运动、风化淋滤、古地貌等多种地质因素共同作用,储集空间多样,非均质性极强。然而,现有储层物性评价方法存在采集数据质量不高、多解性强和实时性、准确性差等问题。为此,以渤海油田变质岩潜山储层为靶区,进行野外露头取样,开展声波时差和微钻头钻进实验,获取不同物性特征岩石的声波时差和机械比能值,并建立物性指数与储层孔隙度的数学模型。研究表明:渤海油田太古界变质岩露头声波时差为371.75~617.29μs/m,机械比能值为297.43~1207.47 MPa,随着声波时差的增大,机械比能值呈指数函数减小,随着物性指数增大,孔隙度呈对数函数减小。该方法在渤海油田变质岩潜山储层进行了推广应用,与测井解释结果符合率达到了85%以上。该研究可为变质岩潜山储层识别提供借鉴和依据。
The formation process of metamorphic buried-hill reservoirs in Bohai Oilfield was complicated,which was affected by tectonic movement,weathering and leaching,paleogeomorphology and other geological factors,resulting in the diversified reservoir space and extremely strong non-homogeneity.However,the existing reservoir physical properties evaluation methods had problems such as low quality of collected data,strong multi-solutions and poor real-time accuracy.For this reason,the metamorphic buried-hill reservoir in Bohai Oilfield was taken as a target area,the field outcrop sampling was carried out,interval transit time and microdrill drilling experiments were carried out to obtain the interval transit time and mechanical specific energy values of rocks with different physical characteristics,and a mathematical model of physical property index and reservoir porosity were established.The study shows that the interval transit time of the outcrops of the Archaeozoic metamorphic rocks of the Bohai Oilfield ranges from 371.75 to 617.29μs/m,and the mechanical specific energy value ranges from 297.43 to 1207.47 MPa.The value of the mechanical specific energy shows an exponential function to decrease with the increase of the interval transit time,and the porosity shows a logarithmic function to decrease with the increase of the physical property index.The method has been popularized and applied in the metamorphic buried-hill reservoir of Bohai Oilfield,and the compliance rate with the logging interpretation results has reached more than 85%.This study provide reference and basis for the identification of metamorphic buried-hill reservoirs.
作者
李辉
谭忠健
耿长喜
邓津辉
张志虎
张立刚
李文元
李浩
Li Hui;Tan Zhongjian;Geng Changxi;Deng Jinhui;Zhang Zhihu;Zhang Ligang;Li Wenyuan;Li Hao(CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China;CNOOC(China)Tianjin Company,Tianjin 300452,China;PetroChina Daqing Exploratory Drilling Engineering Company,Daqing,Heilongjiang 163411,China;Northeast Petroleum University,Daqing,Heilongjiang 163318,China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2023年第6期10-15,共6页
Special Oil & Gas Reservoirs
基金
中海石油(中国)有限公司科技项目“储层有效性录测一体化定量评价技术研究”(YXKY-2019-TJ-03)
中海石油(中国)有限公司“七年行动计划”重大科技专项“渤海油田上产4000万吨新领域勘探关键技术”(CNOOC-KJ 135 ZDXM36 TJ 08 TJ)。
关键词
变质岩
潜山储层
随钻
录井工程参数
孔隙度
渤海油田
metamorphic rock
buried-hill reservoir
while drilling
mud logging engineering parameters
porosity
Bohai Oilfield
