Table of Contents

Foreword Ⅰ
Foreword Ⅱ
Preface
CHAPTER 1 Large Gas Fields andTheir Significance in the Natural Gas Industry
1.Large Gas Fields and Their Important Roles
1.1 Classification Criteria of Large Gas Fields
1.2 Large Gas Field——An Important Foundation for a Great Gas—Producing Country
2.Geological and Geochemical Characteristics of Large Gas Fields in China
2.1 Geochemical Characteristics
2.2 Geological Characteristics
References
CHAPTER 2 Large Coal—Derived Gas Fields and
Their Gas Sources in the Ordos Basin
1.Overview of Natural Gas Geology
1.1 Tectonic Evolution and Sedimentary Formation
1.2 Gas Source Rock
1.3 Reservoirs
1.4 Caprock
2.Sulige Gas Field
2.1 Introduction
2.2 Geological Settings
2.3 Geochemical Characteristics of Natural Gas
2.4 Origin and Source of Natural Gas
3.Yulin Gas Field
3.1 Introduction
3.2 Geological Settings
3.3 Geochemical Characteristics of Natural Gas
3.4 Origin and Source of Natural Gas
4.Wushenqi Gas Field
4.1 Introduction
4.2 Geological Settings
4.3 Geochemical Characteristics of Natural Gas
4.4 Origin and Source of Natural Gas
5.Zizhou Gas Field
5.1 Introduction
5.2 Geological Settings
5.3 Geochemical Characteristics of Natural Gas
5.4 Origin and Source of Natural Gas
6.Mizhi Gas Field
6.1 Introduction
6.2 Geological Settings
6.3 Geochemical Characteristics of Natural Gas
6.4 Origin and Source of Natural Gas
7.Shemnu Gas Field
7.1 Introduction
7.2 Geological Settings
7.3 Geochemical Characteristics of Natural Gas
7.4 Origin and Source of Natural Gas
8.Daniudi Gas Field
8.1 Introduction
8.2 Geological Settings
8.3 Geochemical Characteristics of Natural Gas
8.4 Origin and Source of Natural Gas
9.Jingbian Gas Field
9.1 Introduction
9.2 Geological Settings
9.3 Geochemical Characteristics of Natural Gas
9.4 Origin and Source of Natural Gas
10.Gas Accumulation Stages
10.1 Upper Paleozoic Gas Reservoirs
10.2 Lower Paleozoic Gas Reservoirs
References
CHAPTER 3 Large Coal—Derived Gas Fields and Their Gas Sources in the Sichuan Basin
1.Overview of Natural Gas Geology of the Xujiahe Formation in the Sichuan Basin
1.1 Geology
1.2 Source Rock
1.3 Reservoir
1.4 Reservoir—Caprock Assemblage
1.5 Natural Gas Distribution
2.Guang'an Gas Field
2.1 Introduction
2.2 Major Geological Characteristics
2.3 Geochemical Characteristics of Oil and Gas
2.4 Origin and Source of Natural Gas
2.5 Gas Accumulation Stages
3.Hechuan Gas Field
3.1 Introduction
3.2 Major Geological Characteristics
3.3 Geochemical Characteristics of Oil and Gas
3.4 Origin and Source of Natural Gas
3.5 Gas Accumulation Stages
4.Anyue Gas Field
4.1 Introduction
4.2 Major Geological Characteristics
4.3 Geochemical Characteristics of Oil and Gas
4.4 Origin and Source of Natural Gas
4.5 Gas Accumulation Stages
5.Bajiaochang Gas Field
5.1 Introduction
5.2 Major Geological Characteristics
5.3 Geochemical Characteristics of Natural Gas
5.4 Origin and Source of Natural Gas
5.5 Gas Accumulation Stages
6.Xinchang Gas Field
6.1 Introduction
6.2 Major Geological Characteristics
6.3 Geochemical Characteristics of Natural Gas
6.4 Origin and Source of Natural Gas
6.5 Gas Accumulation Stages
7.Luodai Gas Field
7.1 Introduction
7.2 Major Geological Characteristics
7.3 Characteristics of Natural Gas
7.4 Origin and Source of Natural Gas
7.5 Gas Accumulation Stages
8.Qiongxi Gas Field
8.1 Introduction
8.2 Major Geological Characteristics
8.3 Geochemical Characteristics of Natural Gas
8.4 Origin and Source of Natural Gas
8.5 Gas Accumulation Stages
9.Yuanba Gas Field
9.1 Introduction
9.2 Major Geological Characteristics
9.3 Geochemical Characteristics of Natural Gas
9.4 Origin and Source of Natural Gas
References
CHAPTER 4 Large Coal—Derived Gas Fields and Their Gas Sources in the Tarim Basin
1.Overview of Natural Gas Geology in Kuqa Depression
1.1 Geology
1.2 Gas Source Rock
1.3 Reservoir
1.4 Caprock
1.5 Natural Gas Distribution
2.Kela2 Gas Field
2.1 Introduction
2.2 Major Geological Characteristics
2.3 Geochemical Characteristics of Natural Gas
2.4 Origin and Source of Natural Gas
2.5 Gas Accumulation Stages
3.Dabei Gas Field
3.1 Introduction
3.2 Major Geological Characteristics
3.3 Origin and Source of Hydrocarbon
3.4 Gas Accumulation Stages
4.Di'na2 Condensate Gas Field
4.1 Introduction
4.2 Major Geological Characteristics
4.3 Geochemical Characteristics of Oil and Gas
4.4 Origin and Source of Hydrocarbon
4.5 Gas Accumulation Stages
5.Yingmai7 Condensate Gas Field
5.1 Introduction
5.2 Major Geological Characteristics
5.3 Geochemical Characteristics of Oil and Gas
5.4 Origin and Source of Natural Gas
5.5 Hydrocarbon Accumulation Stages
6.Kokyar Condensate Gas Field
6.1 Introduction
6.2 Major Geological Characteristics
6.3 Geochemical Characteristics of Natural Gas
6.4 Origin and Source of Natural Gas
6.5 Geochemical Characteristics and Source of Condensate Oil（Light Oil）
6.6 Hydrocarbon Accumulation Stages
References
……
CHAPTER 5 Large Coal—Derived Gas Fields and Their Gas Sources in the Junggar Basin
CHAPTER 6 Large Coal—Derived Gas Fields and Their Gas Sources in the Songliao Basin
CHAPTER 7 Coal—Derived Gas Fields and the Gas Sources of Offshore China
INDEX

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5.2.3 Reservoir Deliverability Type and Temperature—Pressure Characteristics
The Xujiahe Formation in the central Sichuan Basin is a low—abundance tight—sand gas field.with a low gas flow rate of a single well.Since 1999.sand fracturing had been conducted in almost all the old wells，and the gas production rate is obviously higher after fracturing.As of December 2013，the annual gas production of the gas field was 1.12 x 108 m3，and the average gas production rate of a single well was about 1.5 x l04 m3／day.
The Baijiaochang area is a trap jointly composed of anticline and fault on the whole； the gas reservoirs have a unified edge water boundary.which occurs in the structural low place； and they are faulted anticline—lithologic reservoirs（Li et al.，2010）.This area is located in the meeting point of the Longmen piedmont NE northwest structure and Daba piedmont northwest—west structure in the northwestern Sichuan Basin，forming overpressure due to tectonic compression and hydrocarbon generation pressurization（Jiang et al.，2009）.As for the Xujiahe Formation gas reservoir，the average temperature is 85oC and average pressure is 54 MPa.with a pressure coefficient of 1.75—1.82.As for the Daanzhai gas reservoir，the temperature ranges from 9.5—73.4oC，and formation pressure ranges from 40.12—41.40 MPa，with a pressure coefficient of 1.47—1.64.