4. Hydrocarbon Migration

Dive into the fascinating world of hydrocarbon migration, a crucial process in petroleum geology that connects hydrocarbon generation and accumulation. This chapter explores the two main stages of migration: primary and secondary. Primary migration involves the expulsion of hydrocarbons from source rocks, driven by forces like normal compaction and undercompaction. Secondary migration, on the other hand, refers to the movement of hydrocarbons through reservoir or conduit layers, influenced by factors such as buoyancy, water dynamics, and tectonic stress. The text delves into the various types of fluid flow, including seepage, buoyancy flow, surge flow, and diffusion flow, each playing a unique role in the migration process. It also discusses the impact of pressure, adsorption, and wettability on hydrocarbon movement. Furthermore, the chapter highlights the importance of understanding migration channels and modes, which are essential for predicting and locating hydrocarbon accumulations. By examining real-world examples and case studies, this text provides valuable insights into the complex interplay of geological factors that govern hydrocarbon migration, making it an indispensable guide for professionals in the field.