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松科二井邻域沙河子组含油气地层结构特征——基于测井和地震数据的分析
Received:March 15, 2019  Revised:June 03, 2019  点此下载全文
引用本文:FU Wei,HOU Hesheng,ZHANG Jiaodong,LIU Cai,FENG Xuan,LU Zhanwu. Structural characteristics of Shahezi Formation beneath the Well SK-2 and its periphery: An analysis of logging and seismic data[J]. Geology in China, 2019, 46(5): 1052-1060(in Chinese with English abstract).
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Author NameAffiliationE-mail
FU Wei Chinese Academy of Geological Sciences, Beijing 100037, China  
HOU Hesheng Chinese Academy of Geological Sciences, Beijing 100037, China
Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 
hesheng.hou@126.com 
ZHANG Jiaodong Center for Oil and Gas Survey, China Geological Survey, Beijing 100029, China  
LIU Cai College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, Jilin, China  
FENG Xuan College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, Jilin, China  
LU Zhanwu Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China  
基金项目:中国地质调查局项目(DD20160207,DD20189702,DD20190010)、国家自然科学基金项目(41474081,41430213,41590863,41574093)、自然资源部深地动力学重点实验室自主研究课题(J1901-3)联合资助。
中文摘要:松辽盆地大陆深部科学钻探工程"松科二井"获得了最完整的沙河子组地层岩心,初步识别出深部页岩气气测异常43层,累计厚度102 m,显示出沙河子组地层具有良好的深部能源前景。为进一步分析松辽盆地沙河子组地层油气资源潜力,本文在前人研究的基础上,结合松科二井测井、岩心数据和地震数据,分析松科二井邻域沙河子组地层的层序特征和空间展布,同时以随钻录井记录到的气测异常为出发点,分析沙河子组地层的测井和地震响应。结果显示:松科二井邻域沙河子组地层具有厚度大、横向延续小的地层展布特点,根据测井、岩心及地震数据,将沙河子组地层分为4个三级层序:SQ1、SQ2、SQ3和SQ4,其中顶部SQ4层序具有较好的油气前景,其岩性以泥岩为主,并具有相对较高孔隙度、低波阻抗的测井曲线特征,在地震剖面上表现为连续强振幅,阻抗反演剖面上存在局部低波阻抗特征,揭示了该区沙河子组深层天然气资源的赋存条件。
中文关键词:松科二井  沙河子组  徐家围子断陷  油气调查工程  深地探测工程
 
Structural characteristics of Shahezi Formation beneath the Well SK-2 and its periphery: An analysis of logging and seismic data
Abstract:During implementation of the Deep Continental Scientific Drilling Engineering Project Well SK-2 in Songliao Basin, the most integrated core data of Shahezi Formation was obtained. And 43 abnormal strata of deep shale gas were preliminarily identified, with a cumulative thickness of 102 meters, indicating that Shahezi Formation has good deep energy prospect. For further analysis of oil and gas resources potential of Shahezi Formation in Songliao basin, in this paper, on the basis of previous studies and in combination with well logging, core data of Well SK-2 and the newly acquired 2-d seismic data in the north-south direction crossing Well SK-2, the spatial distribution and sequence characteristics of Shahezi formation in the vicinity of Well SK-2 well were analyzed. At the same time, based on gas abnormal data acquired form logging during drilling, the authors studied logging and seismic responses of oil and gas perspective reservoirs in Shahezi Formation. It is shown that the Shahezi Formation adjacent to Well SK-2 has large thickness but small lateral extension, and hence the authors divided it into 4 stratigraphic sequences based on well logging as well as seismic and core data, i.e., SQ1, SQ2, SQ3 and SQ4. Among the 4 stratigraphic sequences, SQ4 has a better energy prospect. Its lithology is dominated by mudstone and has the characteristics of high porosity and low wave impedance on logging curves, with continuous strong amplitude on seismic section. Impedance inversion section shows the characteristics of large wave impedance alternated with many smaller wave impedances. Thus, the occurrence conditions of deep natural gas resources of Shahezi Formation in this area are revealed.
keywords:Well SK-2  Shahezi Formation  Xujiaweizi fault depression  oil and gas survey project  deep exploration engineering
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