Petroleum Geochemistry using Wireline Logs Log Geo Chem

Petroleum Geochemistry using Wireline Logs “Log. Geo. Chem” TERRASCIENCES

Why buy Log. Geo. Chem? n Save time and expense by pre-selecting cuttings and core samples to be analyzed. n Detect and analyze previously unrecognized source rocks. n Evaluate areas with no cuttings or core. n Help identify stratigraphic sequence boundaries. n Look at data from wells where “bit induced metamorphism” destroys organic carbon. TERRASCIENCES

Where to use Log. Geo. Chem? n n n Frontier areas around the world. Single well studies in the absence of drilled rock samples. Areas needing generated volumetrics. Field and basin-wide studies. Anywhere with a need to evaluate hydrocarbon generation potential. TERRASCIENCES

Who should buy Log. Geo. Chem? Exploration Managers. n Exploration Geologists. n Geochemists. n Sequence stratigraphers. n Anyone with a need to evaluate hydrocarbon generation potential. n TERRASCIENCES

Cost Benefits n n Software cost is comparable to 2 -3 wells’ worth of laboratory analyses. Indirect time saving of laboratory personnel in not analyzing “undesirable” samples. TERRASCIENCES

Technical Details. . . Uses a traditional log suite as input: Gamma ray n Caliper n Neutron Porosity n Bulk Density n Sonic Delta-T n Three resistivity curves n TERRASCIENCES

Technical details. . . Additional required data items are: – – – – Bottom hole temperature Mud weight Specific gravity of the generated hydrocarbon Thickness of removed overburden Rhob matrix shale value Delta T matrix shale value Gamma ray clean and shale end points. TERRASCIENCES

Technical Details. . . Four primary computed outputs: TOC - total organic carbon. S 1 - volume of previously generated HC. S 2 - remaining volume of HC generation potential. S 3 - Carbon dioxide released during pyrolysis. (GP = S 1+S 2) TERRASCIENCES

Technical Details. . . Secondary computed values include: HI - Hydrogen Index (S 2 / TOC * 100) OI - Oxygen Index (S 3 / TOC * 100) AOC - Atomic Oxygen/Carbon ratio. AHC - Atomic Hydrogen/Carbon ratio. S 2/S 3 ratio - indicator of oil/mixed/gas proneness. S 1/(S 1+S 2) - indicator of thermal maturation. TERRASCIENCES

Technical Details. . . S 1/(S 1+S 2) is used to compute maturation: LOM - Level of Organic Metamorphism. TAI - Thermal Alteration Index. Tmax - degrees C from S 2 pyrogram. TTI - Time-Temperature Index. Ro% - Vitrinite Reflectance. TERRASCIENCES

Technical Details. . . Graphical displays include: • van Krevelen diagram • Modified van Krevelen diagram • TOC vs. S 2 graph • Any other crossplot combination such as TOC vs. depth • Zone summations of key properties TERRASCIENCES

Sample van Krevelen diagram. . . TERRASCIENCES

Key Benefits n Allow analysis for hydrocarbon potential in areas with no core or cuttings available. n Save time and money by “pre-selecting” samples to be analyzed in the lab. n Compute generated volumes, estimate expelled volumes, and compare to reservoir volumes. n World wide applications. TERRASCIENCES

Additional benefits Can be added on to Terra. Station II to allow: n n n Multiple well analysis. Study of data in a regional context. Mapping, zonation, volumetrics. Cross section presentations. Composite well presentations. Available on Windows 95, 98, NT, XP, or UNIX. TERRASCIENCES

Additional benefits Can be purchased as a “stand alone” version: n n n Software contains data import and export. Complete Log. Geo. Chem features. Produces geochemists crossplots. TERRASCIENCES

How to buy Log. Geo. Chem. Contact any TERRASCIENCES office. n Ask for “Sales”. n Tell them you want to buy, lease or rent the Petroleum Geochemistry module. n TERRASCIENCES

TERRASCIENCES Contacts: TERRASCIENCES, Inc 5629 FM 1960 West, Suite 312, Houston, TX 77069 Tel: (281) 893 5117 TERRASCIENCES Ltd Palace Chambers, 41 London Road, Stroud, Glos. , UK GL 5 2 AJ Tel: (01453) 767683 email: sales@terrasciences. com http: //www. terrasciences. com TERRASCIENCES

End of presentation Thank you for taking the time to watch this presentation. We know your time is valuable. Buying this module will SAVE you time and money. TERRASCIENCES