Horizon

This is a characteristic used to identify a horizon.

This is a characteristic used to identify a horizon.

This is the correct answer. Weather patterns are not directly related to the identification of horizons in oil and gas exploration.

This is a characteristic used to identify a horizon.

This is the correct answer. Horizons often indicate the presence of potential reservoirs for oil and gas accumulations.

This is incorrect. Weather patterns are not related to horizons in oil and gas exploration.

While tectonic activity can influence the formation of horizons, it is not their primary role in oil and gas exploration.

While horizons can provide information about geological time periods, it's not their primary role in oil and gas exploration.

This is a lithological horizon, not one defined by a geological event.

This is the correct answer. Sequence boundaries represent significant changes in depositional environments, often marked by erosion or non-deposition.

This is a lithological horizon, not one defined by a geological event.

This is a lithological horizon, not one defined by a geological event.

While horizons can provide information about age, it's not the primary reason for mapping them for well placement.

This is the correct answer. Mapping horizons helps identify potential reservoir locations and guide drilling efforts.

While fossils are associated with horizons, it's not the primary reason for mapping them for well placement.

While horizons can provide clues about past climate, it's not the primary reason for mapping them for well placement.

This is incorrect. Horizons are not directly related to predicting earthquakes.

This is the correct answer. Understanding horizons allows for more accurate estimations of oil and gas reserves.

While horizons can be relevant to groundwater studies, it's not the primary focus in oil and gas exploration.

This is incorrect. Horizons are not related to weather patterns.

The potential reservoir horizon is likely the **Sandstone layer at a depth of 1200 meters.** Here's why:

• Porosity and Permeability: Sandstone is known for its high porosity and permeability, allowing for the storage and flow of hydrocarbons. This makes it a prime candidate for a reservoir rock.
• Lithology Contrast: The sandstone layer is sandwiched between shale layers, suggesting a potential change in depositional environment. This change could have created a trap for hydrocarbons, making the sandstone layer a suitable reservoir target.

Further Actions:

• Core Analysis: Obtain core samples from the sandstone layer to analyze its porosity, permeability, and hydrocarbon saturation.
• Log Interpretation: Perform detailed analysis of well logs (e.g., gamma ray, resistivity, sonic) to confirm the lithological interpretation and identify any potential hydrocarbon signatures within the sandstone layer.
• Seismic Interpretation: Re-evaluate the seismic data in the vicinity of the well to confirm the continuity and extent of the sandstone horizon.
• Pressure Testing: Conduct pressure tests within the sandstone layer to assess its fluid content and potential for producing hydrocarbons.

By performing these analyses, you can confirm or refute the presence of a reservoir at the identified horizon and make informed decisions about future exploration and production activities.