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微生物异常探索万城断裂带北部油气富集规律及有利区
投稿时间:2021-02-05  修订日期:2021-04-21  点此下载全文
引用本文:袁志华,赵青,张玉清,邓富强,秦晓蕾,张忠坡,李英贤,李秀荣.2021.微生物异常探索万城断裂带北部油气富集规律及有利区[J].地质论评,67(5):1533-1542,[DOI]:.
YUAN Zhihua,ZHAO Qing,ZHANG Yuqing,DENG Fuqiang,QIN Xiaolei,ZHANG Zhongpo,LI Yingxian,LI Xiurong.2021.Exploration of the hydrocarbon enrichment and favorable areas in the northern Wancheng fault zone in the Jiangling Sag,Jianghan Depression,by microbial anomaly[J].Geological Review,67(5):1533-1542.
DOI:10.16509/j.georeview.2021.04.216
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作者单位E-mail
袁志华 1)长江大学油气资源与勘探技术教育部重点实验室武汉4301002)长江大学录井技术与工程研究院湖北荆州434023 yzh_mpog@163.com 
赵青 3)中国石油塔里木油田公司勘探开发研究院新疆库尔勒841000 kaix_zc@163.com 
张玉清 1)长江大学油气资源与勘探技术教育部重点实验室武汉430100  
邓富强 4)中国石化集团江汉石油管理局地球物理勘探公司湖北潜江433100  
秦晓蕾 1) 长江大学油气资源与勘探技术教育部重点实验室武汉4301005)长江大学资源与环境学院武汉430100  
张忠坡 4)中国石化集团江汉石油管理局地球物理勘探公司湖北潜江433100  
李英贤 1)长江大学油气资源与勘探技术教育部重点实验室武汉4301006)长江大学地球科学学院武汉430100  
李秀荣 4)中国石化集团江汉石油管理局地球物理勘探公司湖北潜江433100  
基金项目:本文为中石化石油工程先导和推广项目(编号:SG10049)的成果
中文摘要:江汉盆地江陵凹陷万城断裂带北部研究区,地表条件复杂,地震和钻井施工困难,油气富集规律还不甚清楚。因此,试图通过微生物找油方法,最小成本最高效率,以探明本研究区的油气富集规律。研究区面积约230.0 km2,采集样品间距南北500 m × 东西250 m,共采集并分析了样品2354个。研究表明,微生物异常主要分布在万城断层的东侧,其中微生物气异常零星分布,异常较弱,无独立气藏。在综合地质等资料的基础上,微生物异常分布特征表明,万城断裂带显示了来自北西和北东向的双向物源,油气来源于梅槐桥洼陷,属近源成藏。万城断裂带东侧和坡折带低位扇砂体是油气有利富集区,前景较好,主要为古近系新沟咀组成藏。万城断裂带西侧有小面积油藏,可能系白垩系成藏。最后,对微生物异常区进行了分级评价,指明了重点攻关区、评价有利和较有利区,对大幅降低勘探风险和提高勘探成功率,具有重大的社会经济效益和深远的现实意义。
中文关键词:江汉盆地,江陵凹陷,万城断裂带  微生物找油方法  梅槐桥洼陷  近源成藏
 
Exploration of the hydrocarbon enrichment and favorable areas in the northern Wancheng fault zone in the Jiangling Sag,Jianghan Depression,by microbial anomaly
NameInstitution
YUAN Zhihua1)Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Ministry of Education,Wuhan,430100;2)Institute of Mud logging technology and Engineering,Yangtze University,Jingzhou,Hubei,434023
ZHAO Qing3)Research Institute of Exploration and Development,Tarim Oil field Company,CNPC,Kuerle,Xinjiang,841000
ZHANG Yuqing1)Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Ministry of Education,Wuhan,430100
DENG Fuqiang4)Geophysical Exploration Company of JHPA,SINOPEC,Qianjiang Hubei,433100
QIN Xiaolei1)Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Ministry of Education,Wuhan,430100;5)College of Resources and Environment,Yangtze University,Wuhan,430100
ZHANG Zhongpo4)Geophysical Exploration Company of JHPA,SINOPEC,Qianjiang Hubei,433100
LI Yingxian1)Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University,Ministry of Education,Wuhan,430100;6)College of Geoscience,Yangtze University,Wuhan,430100
LI Xiurong4)Geophysical Exploration Company of JHPA,SINOPEC,Qianjiang Hubei,433100
Abstract:In the northern Wancheng fault zone,the surface conditions are complex,seismic and drilling operations are difficult,and the oil and gas enrichment is still unclear. Therefore,by using the microbial oil prospecting method with the minimum cost and the highest efficiency,the oil and gas prospects and enrichment in this area are determined.Methods:The study area is approximately 230.0 km2,the sampling interval of N-S 500 m × W-E 250 m is properly densified in some areas perpendicular to the Wancheng fault zone and structurally favorable zones,and 2354 samples are collected.Results: For each sample,gas and oil indicator bacteria were analyzed respectively,that is,the microbial abnormal value of the oil and gas in the study area.The microbial anomalies are mainly distributed in the eastern Wancheng fault zone,in which microbial gas anomalies are scattered and weak, and there is no independent gas reservoir.Conclusions: On the basis of comprehensive geological and other data,the distribution of microbial anomalies indicates that the Wancheng fault zone shows two-way provenance from the northwest and northeast directions,and the oil and gas come from the Meihuaiqiao sub-sag,which is a near-source accumulation area.The eastern side of the Wancheng fault zone and the lowstand fan sand body in the slope-break zone are favorable oil and gas enrichment areas with good prospects and are mainly composed of the Neogene Xingouzui Formation reservoir.There is a small oil reservoir in the western Wancheng fault zone that may have formed in the Cretaceous.Finally,the classification and evaluation of abnormal microbial zones are carried out,and the key research areas,evaluation favorable and less favorable areas are pointed out,which has great social and economic benefits and far-reaching practical significance to greatly reduce the exploration risk and improve the exploration success rate.
keywords:Wancheng fault zone,Jiangling sag,Jianghan Basin  microbial oil exploration  microbial anomaly of oil and gas  Meihuaiqiao sub-sag  near source hydrocarbon accumulation
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