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A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008

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China Geology 2023年第1期6卷 70-84页

作者： Chao Peng Zhi-qiang Yin Xu-jiao Zhang Hai Shao Ming-fei Pang China University of Geosciences(Beijing) Beijing 100029China China Institute of Geo-Environment Monitoring China Geological SurveyMinistry of Natural ResourcesBeijing 100081China China University of Geosciences Wuhan 430074China

Determining the main controlling factors of earthquake-triggered geohazards is a prerequisite for studying earthquake geohazards and post-disaster emergency *** studying these factors,the geomorphic and geological factors controlling the nature,condition,and distribution of earthquake-induced geohazards can be *** insights facilitate earthquake disaster prediction and emergency response *** authors combined field investigations and spatial data analysis to examine geohazards induced by seismic events,examining ten earthquakes including the Wenchuan,Yushu,Lushan events,to elucidate the main control factors of seismic *** authors observed that seismic geohazard occurrence is usually affected by many factors,among which active nature of the seismogenic fault,seismic peak ground acceleration(PGA),topographic slope and geomorphic height differences,and distance from the fault zone and river system are the most *** with strike-slip earthquakes,thrust earthquakes induce more high-altitude and high-speed remote landslides,which can cause great *** of 0°–40°are prone to secondary seismic geohazards,which are mainly concentrated 0–6 km from the river *** geohazards are not only related to seismogenic fault but also influenced by the associated faults in the earthquake *** maximum seismic PGA and secondary seismic geohazard number are positively correlated,and the horizontal and vertical ground motions play leading and promoting roles in secondary geohazard formation,*** the research,the spatial distribution of seismic geohazards is predicted,providing a basis for the formulation of emergency response plans following disasters.

关键词： Wenchuan earthquake Geohazards main control factors Comparative study Geological disater survey engineering Western China

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main controlling factors and Accumulation Model of Chang 9 Reservoir in Northwest Ordos Basin, China

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China Oil & Gas 2019年第6期26卷 39-44页

作者： Zhang Weigang Chen Gang Department of Geology Northwest University Oil Production Plant No.8 Changqing Oilfield Company

In northwestern Ordos Basin, the Triassic reservoir Chang 9 has favorable reservoir forming conditions, extensive reservoir development, and huge potential for oil exploration and exploitation. Studying the main controlling factors and accumulation model of Chang 9 reservoir in this area can provide a basis for the production targets, and assist in formulating reasonable development technology policy. In this paper, to explore and summarize the hydrocarbon accumulation model, the Chang 9 reservoir were analyzed from the aspects of oil source, fracture, oil migration, structure, lithology and reservoir physical properties for the main controlling factors in this area. Organic geochemical and geological comprehensive analysis that the oil-source of the Chang 9 reservoir in the northwest of Ordos Basin is derived from Chang 7 hydrocarbon source rocks. The fractures provide a sound channel for the "vertical multi-point filling" of the oil source from Chang 7 to Chang 9. The crude oil migrates vertically from Chang 7 to Chang 9, then expands horizontally to form a reservoir. Structures play an important role in controlling the distribution of reservoirs, the control by sand in small layer and physical property is also obvious. This paper creatively establishes the reservoir accumulation model of Chang 9 in northwest of Ordos Basin, which is characterized by Vertical multi-point filling, horizontal expansion becomes oil pool. It reveals the genetic mechanism of the development of Chang 9 multi-reservoir in the study area, which provides guidance for exploration and evaluation deployment.

关键词： Ordos Basin Chang 9 reservoir petroleum accumulation main control factors hydrocarbon pooling patterns

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寺家庄井田地温负异常及其主控因素研究（英文）

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山西焦煤科技 2017年第Z1期 8-16页

作者：杨昌永田庆玲郝春生季长江于振锋常会珍 State Key Laboratory of Coal and CBM Co-mining Yi'an Lanyan Coal and Coalbed Methane Co-mining Technology Co. LTD

The research on geothermal field is one of the hot research content in the development of oil or gas and mining *** on the stratum temperature measurement data of 332 borehole in Sijiazhuang coalfield,the formation lithology and composed characteristics,geological and hydrogeological conditions,we did a research on the geothermal negative anomaly and its main controlling *** the research,we come to a conclusion:The modern geothermal field of Sijiazhuang coalfield is mainly effected by 3 factors:formation thermal conductivity,underground water and open *** high content of sandstone in coalfield layer causes strong thermal conductivity,fast heat conduction,difficulty in heat aggregation,which is the main controlling factors of low value in geothermy of Sijiazhuang coalfield;the strong regional groundwater runoff state is the macro control factors of its lower in modern geothermal field of this *** mine groundwater flow state play a"cooling"rool and the induced structural channel loss function to the surrounding rock temperature,which is an important control factor of geothermal negative anomaly and geothermal field varies in the study area;the open extensional fault and collapse column not only provide a good channel for geothermal loss,but also provide favorable conditions for the refrigeration to the surrounding rock from aquifer groundwater circulation and runoff,which is the key control factor to the geothermal negative anomaly and geothermal field varies of this coal field.

关键词： Sijiazhuang Minefield Geothermal field Geothermal Negative anomaly Geothermal field differentiation main control factors

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