1．INTRODUCTION L
1．1 Discovery and exploration of Carboniferous gas pool
1．1．1 Before the discovery
1．1．2 Discovery of Carboniferous pool
1．1．3 Exploration on Carboniferous pool
1．2 Works done and results Of exploration
1．2．1 Seismic
1．2．2 Drilling
2．FOLDING AND DEFORMATION CHARACTERS OF HIGH STEEP STRUCTURES IN
EASTERN SICHUAN AND THEIR VERTICAL．VARIATION GEOLOGICAL MODEL
2．1 Basement structure and history of depositional cover
2．1．1 Orerview on basement structure
2．1．2 Sedimentary cover
2．1．3 Regional structure
2．2 Folding and deformation in Chuandong high steep structures
2．2．1 2nd weak rock group（Leikoupu formation to Jia II member of Jialingjiang fomlation）--top
thin-limb thick disharmonic fold model
2．2．2 1st weak rock group（Silurian）--top thick-limb thin fold model
2．2．3 Shallow level（Jurassic to upper Triassic）--high steep fold model
2．2．4 Middle level（Carboniferous to Permian）disintegrated fold model
2．2．5 Deep 1evel（Ordovidan to Cambrian）--Y shape horst model
2．3 Vertical variation geological model and its forming mechanism
2．3．1 Vertical variation geological model
2．3．2 Forming mechanism
3．FORMING CONDITIONS OF CARBONIFEROUS GAS POOL
3．1 Petroleum source and potential
3．1．1 Genetic type of natural gas
3．1．2 Petroleum source rock
3．1．3 Petroleum forming model and petroleum potential
3．2 Reservoir character and evolution of pore
3．2．1 Division of strata and lithologic changes
3．2．2 Paleogeography
3．2．3 Deposition model
3．2．4 Pore structure and reservoir type
3．2．5 Diagesis and evolution of pore
3．2．6 Factors control the forming of reservoir and reservoir assessment
3．3 Migration and accumulation of petroleum
3．3．1 First migration of petroleum
3．3．2 Secondary migration
3．3．3 Trap types and hydrocarbon accumulation
3．4 Preservation conditions of natural gas
3．4．1 Mechanism of direct seal
3．4．2 Mechanism of indirect seal
3．4．3 Vertical hydrogeological Zonation
4．POOL FORMING MODEL OF CARBONIEEROUS GAS AND ACCUMULATION
REGULARITIES
4．1 Forming history of Carboniferous gas pool
4．1．1 Application of basin numeric modeling
4．1．2 Forming history of Carboniferous pool
4．2 Pool forming model of Carboniferous gas
4．2．1 Early accumulation model（two forming stages model）
4．2．2 Late accumulation model（one forming stage model）
4．3 Enrichment regularities of Carboniferous gas pool
4．3．1 High petroleum potential strength area
4．3．2 Effective reservoir in favorable facial zone
4．3．3 Inherited large paleouplift
4．3．4Goodd trap
4．3．5 Low potential area of present fluid potential field·
4．4 Case history of Carboniferous gas pools
4．4．1 Wubaiti Carboniferous gas pool of Datianehi structural belt
4．4．2 Longtou-Diaozhongba gas pool_-Dachiganjing structural belt
5．EXPLORATION TECHNIQUES OF HIGH STEEP STRUCTURE GAS Pool
5．1 Processing．sequential and model interpretation of seismic data in high steep structures
5．1．1 Establishment of vertical variation model for high steep structure
5．1．2 Establishment of physical model of high steep structure
5．1．3 Migration methods and techniques of processing for high steep structure
5．1．4 Fine interpretation of seismic sections in high steep structure
5．2 Lateral prediction of Carboniferous reservoir
5．2．1 Prediction of Carboniferous thicknes
5．2．2 Prediction on rank of reservoir quality
5．3 Prediction of gas water contact-pseudo pressure coefficient method
5．3．1 Prediction of gas water contact by pseudo pressure coefficient
5．3．2 Defining the pseudo pressure coefficient
5．3．3 Case histories
5．4 Selection of targets and targeting by directional side well
5．4．1 Selection of target
5．4．2 Directional side well
6．GENERAL REMARKS AND FORECAST
6．1 General remarks
6．2 Forecast
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REFERENCES
PLATE AND EXPLANATORY NOTES
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