摘要
针对渤海湾盆地渤中A构造古生界碳酸盐岩潜山勘探中存在的岩性定名不精准、界面卡取精度低、地层划分与对比困难、优质储层识别缓慢等问题,引入X射线衍射(XRD)录井技术。通过建立岩性定名三角图板,实现了碳酸盐岩过渡岩性的精细定名;基于上覆泥岩矿物含量的“三段式”变化规律,建立了潜山界面预警与识别方法;利用长石含量与自然伽马测井曲线的拟合模型,实现了随钻地层精细划分与对比;结合矿物成分与岩石脆性关系,建立了基于脆性指数的优质储层快速识别方法。该技术在渤中A构造7口探井中应用结果表明,岩性定名符合率达92%,界面卡取精度控制在界面以下的3 m以内,地层层位划分误差不超5 m,优质储层解释符合率达83%,有效支撑了钻井安全与勘探决策。
To address issues in the exploration of Paleozoic carbonate rock buried hills of the Bozhong A structure in Bohai Bay Basin,such as inaccurate lithology naming,low precision in interface determination,difficulty in stratigraphic division and correlation,and slow identification of high-quality reservoirs,X-ray diffraction(XRD)logging technology has been introduced.By building a lithology naming triangular chart,the precise naming of carbonate transitional lithologies was achieved.Based on the"three-stage"variation law of mineral concentration in overlying mudstone,a method for early warning and identification of the buried hill interfaces was established.The fitting model combining feldspar content with natural gamma logging curve enabled fine stratigraphic division and correlation while drilling.Integrating mineral composition with rock brittleness,a rapid identification method for high-quality reservoirs based on brittleness index was established.The application of this technology to seven exploration wells in Bozhong A structure shows that the lithology naming coincidence rate is 92%,the interface determination accuracy is controlled within 3 meters below the interface,the stratigraphic horizon division error does not exceed 5 m,and the interpretation coincidence rate of high-quality reservoirs is 83%,effectively supporting drilling safety and exploratory decisions.
作者
马福罡
李战奎
苑仁国
魏雪莲
李谦
管宝滦
MA Fugang;LI Zhankui;YUAN Renguo;WEI Xuelian;LI Qian;GUAN Baoluan(CNOOC Ener Tech-Drilling&Production Co.,Tianjin 300452,China;CNOOC China Limited Tianjin Company,Tianjin 300450,China)
出处
《录井工程》
2025年第4期113-118,共6页
Mud Logging Engineering
基金
中海油能源发展股份有限公司重大科研专项(课题)“井漏风险随钻预警技术研究”(编号:HFKJ-ZX-GJ-2023-05-01)。
关键词
XRD录井技术
碳酸盐岩潜山
岩性定名
界面卡取
地层划分
储层评价
XRD logging technology
carbonate buried hill
lithology naming
interface determination
stratigraphic division
reservoir evaluation
