Clay Seals of Oil and Gas Deposits

Contents; Introduction;

PART I FORMATION OF CLAY SEAL PROPERTIES: THEORETICAL FUNDAMENTALS

Chapter 1 Composition of Clay Sediments and Their Structure Formation in Sedimentogenesis

• 1.1. Composition of clay sediments
• 1.2. Structure of clay sediments
• 1.3. The theory of structure formation in clay dispersions
• 1.4. Structural bonds
• 1.5. Formation of primary microstructures in clay sediments

Chapter 2 Lithogenesis of Clay Sediments

• 2.1. General information
• 2.2. The stages of lithogenesis
• 2.3. Boundaries between the stages and substages of lithogenesis

Chapter 3 Formation of the Properties of Clay Seals in Lithogenesis

• 3.1. Density and porosity
• 3.2. Water content and consistence
• 3.3. Permeability
• 3.4. Physical-mechanical properties
• 3.5. Rheological properties
• 3.6. General regularities in the formation of clay properties in the process of lithogenesis

PART II CHARACTERISTIC OF THE FACIES TYPES OF CLAY SEALS

Chapter 4 Depositional Environments of Clay Seal Formation

• 4.1. The cyclic structure of sedimentary basin sequences
• 4.2. Source provinces
• 4.3. Evolution of sedimentation basins
• 4.4. Classification of clay seals according to their depositional environments and screening properties

Chapter 5 Facies Analysis of Clay Seals in Oil- and Gas-Bearing Basins

• 5.1. The principal criteria for facies analysis
• 5.2. Facies analysis of clay seals in sedimentary basins

Chapter 6 The Composition of the Facies Types of Clay Seals and Its Change with Depth

• 6.1. The composition of the facies types of clay seals
• 6.2. A comparative characteristic of the composition of clay seals of various facies types

Chapter 7 Structure and Properties of the Facies Types of Clay Seals

• 7.1. The influence of depositional environments on the structure formation
• 7.2. Porosity
• 7.3. Microfracturing
• 7.4. Permeability
• 7.5. Destruction of clay seals of different facies types with depth

PART III MODELING OF THE CHANGE IN THE CLAY SEAL PROPERTIES IN LITHOGENESIS

Chapter 8 Physicochemical Models of Clay Rock Microstructures

• 8.1. The concepts of the physicochemical mechanics of clay rocks as a basis for modeling
• 8.2. Calculation of the number of contacts
• 8.3. Strength of individual contacts between clay particles

Chapter 9 Development of a Mathematical Model for Estimating the Strength of Clay Seals

• 9.1. Theoretical calculation of the change in the strength of individual contacts with depth
• 9.2. Calculation of the change in the number of contacts in clay seals with depth
• 9.3. Theoretical calculation of tensile and compressive strength of clay seals

Chapter 10 Comparison of Theoretical Calculation Results and Experimental Data on the Mechanical Strength of Clay Seals

• 10.1. Experimental data base
• 10.2. Comparison of theoretical and experimental data

References; Subject Index.

Biography

Osipov, V.I.; Sokolov, V.N.; Eremeev, V.V.