Presentation on theme: "Petroleum Geology and the Permian Basin"— Presentation transcript:
1 Petroleum Geology and the Permian Basin Andrew McCarthyConcho Resources
2 Petroleum System Source: organic-rich mudrock Heat (burial) and time Reservoir: porous rockSeal: low-permeability rockTrap
3 Source 3,850,000 EJ burial Sol (our sun) Fusion (of hydrogen and helium)burial3,000 EJEarth3,850,000 exajoules per year – Solar radiation3,000 exajoules per year – captured by plant life500 exajoules per year – total human use (fossil, nuclear, etc.)
4 + Source Shale: high organic material Gas (methane, ethane, propane) H2SCO2N2+KerogenHeat and pressureKerogen: geo-plastic or geo-chocolate.Lipids, proteins, carbohydratesTexas tea(light, sweet crude)
5 How much heat? Low temps yield nothing: <60 C High temps yield oil: 60C-120+CHigher temps yield gas: 120+C
6 100% natural and organic Oil is 100% natural and organic Yummy!Oil is 100% natural and organic95%++ of all oil ever generated has been naturally leaked to the surfaceMillions of natural oil seeps exist around the planet, many under the oceansNaturalOil seeps(BP notInvolved)NotIcedtea
7 An oil reservoir at the surface Oil reservoirs are exposed and eroded away. The light oil is biodegraded, tar remains.
8 OK. So far we have: Source Heat and time Now we need a reservoir, a seal, and maybe a trap
9 Reservoir The first key to a reservoir rock is porosity intergranular fracture
25 Reservoirs*Just about everything!carbonatessandsShale/silt
26 What does a geologist do? Exploration very little data!Seismic, basin geochem, remote sensingEverything changes with the first wellDevelopment increasing amounts of data!Well logs, core, production dataOperationsDay-to-day drillingWhen do we have “the answer”?