地质科技通报2025，Vol.44Issue(5)：82-94,13.DOI:10.19509/j.cnki.dzkq.tb20250144
基于常规测井曲线的火山岩裂缝预测:以渤海湾盆地渤南地区中生界为例
Prediction of volcanic rock fractures based on conventional logging curves:A case study of the Mesozoic in the Bonan area,Bohai Bay Basin
摘要
Abstract
[Objective]Tectonic fractures play a significant role in enhancing the physical properties and hydrocarbon productivity of deep volcanic buried-hill reservoirs.Due to their strong heterogeneity,precise characterization of fracture density across different parts of the fault zone is required.In practical production,the high cost of core acquisition and imaging logging data motivates the use of a comprehensive fracture index(CFI)calculated from conventional logging curves to delineate the internal structure of fault zones and quantitatively identify fracture density,providing a basis for exploring fractured volcanic reservoirs.[Methods]A CFI model was constructed for Mesozoic volcanic rocks in the Bonan area of the Bohai Bay Basin using seven logging parameters:Acoustic travel time(AC),neutron porosity(CN),bulk density(DEN),caliper(CAL),deep lateral resistivity(RD),shallow lateral resistivity(RS),and micro-lateral resistivity(RMLL).The cumulative CFI curve slope was used to define the boundaries of fracture-dense zones,partitioning the fault zone into the fault core,damage zone,and host rock.The damage zone exhibits the highest fracture density,followed by the host rock,while the fault core is nearly fracture-free.[Results]In the Mesozoic volcanic rocks of the study area,the seven conventional logging curves show distinct responses in fracture-developed zones:AC,CN,and CAL increase,whereas DEN,RD,RS,and RMLL decrease.The CFI curve shows a pronounced rise in fracture-rich intervals.Comparison with imaging logs and core data confirms that high CFI values correlate with fracture zones.By integrating seismic interpretation to identify the fault core,the distribution of the damage zone and host rock can be delineated,enabling effective fracture prediction in Mesozoic volcanic rocks in the Bonan area.[Conclusion]The CFI model,derived from logging curves,can effectively quantify the intensity of fracture development in volcanic rocks,locate the downhole spatial distribution of fracture-dense zones,and enable the reliable identification of internal-zone structures via cumulative CFI curve analysis.关键词
火山岩储层/渤海湾盆地/综合裂缝指数/测井曲线/裂缝带/损伤带/断核/围岩Key words
volcanic reservoir/Bohai Bay Basin/comprehensive fracture index/logging curve/fracture zone/damage zone/fault core/host rock分类
天文与地球科学引用本文复制引用
邵志远,何杰,廖远涛,佟殿君,任建业,陈文强,王华..基于常规测井曲线的火山岩裂缝预测:以渤海湾盆地渤南地区中生界为例[J].地质科技通报,2025,44(5):82-94,13.基金项目
中国石油(中国)有限公司天津分公司科技项目"渤南地区走滑断裂控缝机制与潜山优质储层发育规律"(CCL2024TJX0NST0044) （中国）
