Aerospace detection of hydrocarbon-induced alteration

H. Yang, F.D. van der Meer, J. Zhang

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

3 Citations (Scopus)

Abstract

This chapter provides an overview of the background to the direct detection of onshore hydrocarbon microseepage by remote sensing techniques and the results achieved to date. The occurrence at surface of hydrocarbon seeps suggests that an oil or gas reservoir leaks even though it acts as a trap for hydrocarbons. Macroseepage is the visible presence of oil and gas seeping to the surface. Microseeps are invisible trace quantities of hydrocarbons seeping to the surface. The most persuasive evidence for microseepage is the measurement, sometimes over many years, of statistically-significant anomalous amounts of light hydrocarbons in soil gases and soils directly over oil and gas reservoirs. The occurrence of hydrocarbon microseepage directly above reservoirs points to vertical migration of hydrocarbons, despite the fact that groundwater movement might be expected to militate against this. The cross-sectional shape of the hydrocarbon leakage pattern is termed a “chimney,” and most chimneys are nearly vertical. Vertical migration through the strata has been attributed to at least four mechanisms: effusion, diffusion, solution, and gas bubbles.
Original languageEnglish
Title of host publicationHandbook of Exploration Geochemistry
EditorsM. Hale
Place of PublicationAmsterdam, The Netherlands
PublisherElsevier
Pages233-245
Volume7: Geochemical remote sensing of the subsurface
ISBN (Print)0-444-50439-7
DOIs
Publication statusPublished - 2000

Keywords

  • ADLIB-ART-67
  • NRS
  • ESA
  • NLA

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