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准噶尔盆地准中4区块侏罗系断裂特征及对油气成藏的控制作用
投稿时间:2018-03-27    点此下载全文
引用本文:刘辉,胡修权,梁家驹,徐国盛,淡永,向奎,赵永福,张建伍.2018.准噶尔盆地准中4区块侏罗系断裂特征及对油气成藏的控制作用[J].地质论评,64(6):1489-1504,[DOI]:.
LIU Hui,HU Xiuquan,LIANG Jiaju,XU Guosheng,DAN Yong,XIANG Kui,ZHAO Yongfu,ZHANG Jianwu.2018.Characteristics of Jurassic Fault and Its Control Effect on Hydrocarbon Accumulation in the Block 4 in the Center of the Junggar Basin[J].Geological Review,64(6):1489-1504.
DOI:
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作者单位E-mail
刘辉 1) 成都理工大学能源学院, 成都, 6100592) 成都理工大学“油气藏地质及开发工程”国家重点实验室, 成都, 610059 lhsy110170853@qq.com 
胡修权 1) 成都理工大学能源学院, 成都, 6100592) 成都理工大学“油气藏地质及开发工程”国家重点实验室, 成都, 610059 hu-200432@qq.com 
梁家驹 1) 成都理工大学能源学院, 成都, 6100592) 成都理工大学“油气藏地质及开发工程”国家重点实验室, 成都, 610059  
徐国盛 1) 成都理工大学能源学院, 成都, 6100592) 成都理工大学“油气藏地质及开发工程”国家重点实验室, 成都, 610059  
淡永 3) 中国地质科学院岩溶地质研究所广西桂林, 541004  
向奎 4) 中国石化胜利油田勘探管理中心, 山东东营, 257017  
赵永福 4) 中国石化胜利油田勘探管理中心, 山东东营, 257017  
张建伍 5) 中国石油长庆油田分公司勘探开发研究院, 西安, 710018  
基金项目:本文为成都理工大学油气藏地质及开发工程国家重点实验室资助项目(编号:PLC201710)、国家科技重大专项(编号:2016ZX05052)、中国地质调查局地调项目(编号:DD20179012)和四川省教育厅科研项目(编号:17ZB0050)的成果。
中文摘要:准中4区块位于准噶尔盆地腹部,油气资源丰富,勘探潜力巨大,但勘探程度低。结合断层几何学、运动学及动力学特征,开展了侏罗系断层对油气藏控制作用的研究。结果表明:研究区侏罗系以走滑断层为主,构造样式有4种。D1井—D1井西区域以孤立或雁列式的中等角度逆断层为主,部分正花状构造,表现为早侏罗世拉张,中晚侏罗世压扭;D2井北区域以负花状构造为主,构造环境为张扭;D6井区域以直立缺少分支的走滑断层和负花状构造为主,表现为早侏罗世拉张,中晚侏罗世张扭。从时间上来说,中侏罗世断裂平均活动速率最强,早侏罗世次之,晚侏罗世最弱。从区域上来说,D2井北区域在早中侏罗世断裂平均活动速率最大,在晚侏罗世弱于D1井—D1井西区域,D6井区域在整个侏罗纪时期断裂平均活动速率最弱。同时,探讨了油源断裂、断层相关圈闭、断层侧向封闭性对油气成藏的疏导、富集场所、聚集可能存在影响。
中文关键词:准中4区块  侏罗系  走滑断层  断裂活动速率  油气成藏
 
Characteristics of Jurassic Fault and Its Control Effect on Hydrocarbon Accumulation in the Block 4 in the Center of the Junggar Basin
NameInstitution
LIU Hui1)College Of Energy Resources; Chengdu University Of Technology,Chengdu,610059;2)State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, 610059
HU Xiuquan1)College Of Energy Resources; Chengdu University Of Technology,Chengdu,610059;2)State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, 610059
LIANG Jiaju1)College Of Energy Resources; Chengdu University Of Technology,Chengdu,610059;2)State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, 610059
XU Guosheng1)College Of Energy Resources; Chengdu University Of Technology,Chengdu,610059;2)State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, 610059
DAN Yong3)Institute of Karst Geology,CAGS, Guilin,Guangxi,541004
XIANG Kui4)Exploration Management Center,Shengli Oilfield Company,SINOPEC,Dongying,Shandong,257017
ZHAO Yongfu4)Exploration Management Center,Shengli Oilfield Company,SINOPEC,Dongying,Shandong,257017
ZHANG Jianwu5)Exploration and Development Institute of PetroChina Changqing Oil field Company,Xi’an,710018
Abstract:Objectives: Block 4 is located in the middle of the Junggar basin. It contains vast quantities of recoverable oil and gas, and has huge potential for exploration and production, but in the low degree of exploration. Combing fault geometry with kinematics features, effects of Jurassic faults control hydrocarbon reservoirs are studied in this research. Methods: On the basis of the study of regional tectonic stress field, dividing the type of fracture; analyzing the tectonic environment formed by fracture, and summarize the structural style of fault through intricate layer and fault interpretation, combining coherence attribute and time slice to carry out fault combination. Statistical the type of the fault (fault properties, strikes, tendencies and whether it is source fault for classification of fracture and comparison of subregional differences, by means of the balanced profile technique, calculating the fracture activity rate and the fracture kinematics characteristics. Discussing how the oil reservoir controlled by fault according to the correlation between drilling oil and gas display level and the distance from oil source fracture, compilation of reservoir profile and calculation of SGR of the upper level of drilling reservoir Results: Through statistics, the number of normal faults on the plane is more than that of the reverse fault, and there is almost no relative dominance or tendency in the normal fault while the strike of the reverse fault is NW tending to be SW. Most of the faults in the work area are cut to the J1b, which can be defined as the source fault. The fault activity rate shows that the rate of D1—D1 west is 0.80~6.99 m/Ma, D2 north is 1.36~9.50 m/Ma,D6 is 0.80~6.99 m/Ma. As a whole, the fracture activity rate is the highest during the period of the middle Jurassic(J2x, J2t); the fracture activity rate is the medium level during the early Jurassic(J1b, J1s), the fault activity rate is the lowest during the late Jurassic(J3q). In the study area, four types of concealed traps are identified; the lithological traps include fault communication and fault isolation, and structural lithological traps include fault occlusion and fault clamping. The results of SGR calculation of the fault shows that the lateral sealing ability of the faults in the upper dip direction of the J2x of D8 well is better, and the lateral sealing property of the upper dip direction of the J2t reservoir in D11 well is poor. Conclusions: The Jurassic faults in the study area are mainly strike slip faults, with four patterns: positive flower structure, negative flower structure, up right strike slip fault with a lack of branch faults, and Isolated or echelon middle angle reverse fault. Dong 1— Dong 1 western area is characterized by middle angle isolated or echelon fracture abnormal faults. Some of the faults have positive flower structure which represent extension in the early stage of Jurassic and compresso- shear in the and late stage of Jurassic. Dong 2 northern area has the characteristics of negative flower structure with the mechanism of transtension. Dong 6 area has the feature of negative flower and strike- slip faults with lack of brunch. Those features show extension happened in the early stage of Jurassic and transtension happened in the middle and late stage of Jurassic. Temporality, the highest average fault activity rate happened in the middle stage of Jurassic. The early stage of Jurassic average fault activity rate is lower than the rate in the middle stage of Jurassic and better than the rate in the late stage of Jurassic is the lowest Spatially, Dong 2 northern area has the highest average fault activity rate in the early to middle stage of Jurassic, the rate is lower than Dong 1— Dong 1 western area in the late stage of Jurassic. Dong 6 area has the lowest average fault activity rate during Jurassic. The effects of how faults control hydrocarbon migration show in the following aspects: the faults in reservoir rocks is the primary control of hydrocarbon enrichment; faults traps is the main storage space for hydrocarbon; lateral sealing of trap influence hydrocarbon accumulation.
keywords:block 4 in the middle of the Junggar Basin, Jurassic, stike- slip fault, average fault activity rate(AFAR), hydrocarbon accumulation
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