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why i am confident in vil

  1. 4,287 Posts.
    Hi folks

    This is from go to faqs for pictures

    How do you know there is oil where you plan to drill?

    Cypress Drilling uses multiple leading edge technologies combined with expert geological analysis in its search for oil and gas depoisits. In the examples shown below, you will see how both two and three-dimensional seismic data is integrated with sub-surface data to help identify promising oil and gas reservoir locations.

    3-D Subsurface Seismic
    A section of 3-D seismic is shown to the left. The geophysicist will analyze the data and make his interpretations (shown by colored lines) about how the different formations in a specific area under the earth formed and whether or not they may bear oil and/or natural gas. Cypress makes extensive use of 2-D and 3-D seismic and has an excellent team of geophysicists to examine the data.
    3-D Seismic Topography
    3-D seismic can also help determine the aerial extent of a reservoir. The red and yellow colors in the image at left shows the potential size and geographical location of possible oil/gas bearing formations. This information helps the land personnel identify which tracts of land to acquire drilling rights to.
    Soil Substrate Analysis
    Two characteristics a reservoir rock must have to be productive are porosity and permeability. Porosity is the percent of pore space between grains. It represents the potential area that oil or natural gas can occupy. Permeability is the interconnectivity of the pore space. In simple terms, you must have space (porosity) for the oil nad gas to occupy and you must have paths (permeability) for them to travel to the wellbore. The image at left is a good example of both porosity and permeability. Notice how much of the slide area is occupied by the blue space (porosity) and also how the blue area is not segmented but rather, almost completely interconnected.
    Well Logs
    Once the well is drilled, an open hole log (bottom left) is usually run. Well logs are used to identify and correlate underground rocks and to determine the mineralogy and physical properties of potential reservoir rocks and the nature of fluids they contain. A geologist will often look at logs from several wells in an area and correlate them side by side to help determine which direction a specific reservoir may run under the earth. The graphic (lower right) depicts log correlation from five drilled wells that helped to define two additional driling locations for Cypress.


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