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Foreword I Foreword ¢ò Preface Chapter 1 Regional Geology and Preliminary Results 1.1 Regional Geology 1.Tectonic evolution 2.Regional sedimentary evolution 1.2 History of Makran Gas Hydrate Research 1.Pakistani sea area 2.Iranian waters 1.3 Previous Research Results 1.Research results from other countries 2.Research results of Qingdao Institute of Marine Geology Chapter 2 Offshore Data Acquisition in the Northwest Indian Ocean 2.1 Purpose of the Survey 2.2 Research Vessels and Line Layout 1.Research vessels and equipments 2.Layout of seismic lines and stations 2.3 Seismic Acquisition Technical Requirements 2.4 Technical Requirements for Geochemical Sample Collection 1.Columnar sample 2.Pore water 3.CTD Chapter 3 Gas Hydrate Seismic Data Processing 3.1 Analysis of Raw Seismic Data 1.Low frequency background noise 2.Trace gaps 3.Cable noise 4.Multiple analysis 5.Spectrum analysis of original data 6.Summary of original data analysis 3.2 Seismic Data Processing Challenges and Processing Ideas 1.Processing challenges 2.Processing ideas 3.3 Key Technical Measurements 1.Cable noise attenuation affected by external forces 2.Noise attenuation from endogenous cables 3.Blank trace interpolation 4.Random noise attenuation 5.Multiple suppression 6.Velocity selection 7.Time migration 3.4 Seismic Data Processing Flow 3.5 Analysis of Processing Results 1.Significant interference and multiple suppression 2.High signal-to-noise ratio 3.High resolution 4.Clear characteristics of the effective wave group 5.Good closure condition of the survey line 3.6 Presentation of Result Profiles