Well logging service for Sp Resistivity and Gamma Ray log?

Spontaneous Potential (Sp) Resistivity and Gamma Ray logs are commonly used in well logging to provide valuable information about subsurface formations during oil and gas exploration and wellbore characterization. Let’s look at each log type:

1. Spontaneous Potential (SP) Resistivity Log:

   • Purpose:
     • The SP resistivity log measures the natural potential difference that exists between the formation and the drilling mud. It is sensitive to the presence of shale and clay minerals and can be used to identify boundaries between different rock types.
   • Applications:
     • Identification of shale and clay layers.
     • Detection of permeable zones.
     • Determination of formation water salinity.
     • Correlation of stratigraphic units.

2. Gamma Ray Log:

   • Purpose:
     • The Gamma Ray log measures the natural gamma radiation emitted by the formations. Different rock types emit varying levels of gamma radiation, allowing for the identification of lithology and the presence of certain minerals.
   • Applications:
     • Lithology identification and correlation.
     • Detection of shale and clay content.
     • Evaluation of radioactive minerals (uranium, thorium).
     • Stratigraphic correlation.

Integration of SP Resistivity and Gamma Ray Logs:

1. Shale Identification:
   • Shale typically has a high SP value and emits a relatively high gamma-ray signal. The combination of SP resistivity and gamma-ray logs helps identify and quantify shale content in subsurface formations.
2. Lithology Differentiation:
   • The integration of SP and gamma-ray logs aids in distinguishing between different lithologies. For example, sandstone and limestone formations generally exhibit lower gamma ray values compared to shale.
3. Permeability Estimation:
   • SP resistivity can provide indications of permeability variations, and when combined with gamma-ray logs, it helps in evaluating the potential flow characteristics of different zones within a formation.

4. Formation Water Salinity:

   • SP resistivity is sensitive to the salinity of the formation water. By analyzing the SP log in conjunction with other logs, it is possible to estimate the salinity of the formation water.
5. Stratigraphic Correlation:
   • Both SP resistivity and gamma-ray logs are valuable for correlating stratigraphic units between different wells. This correlation helps in building a comprehensive understanding of the subsurface geology.
6. Mineral Content Evaluation:
   • Gamma-ray logs can indicate the presence of certain radioactive minerals, providing information about the mineral composition of the formation.
7. Identification of Drilling Hazards:
   • The presence of shale and other problematic formations can be identified through the integration of SP and gamma-ray logs, helping in planning drilling operations and avoiding potential drilling hazards.
8. Wellbore Stability Assessment:
   • The information obtained from these logs contributes to assessing wellbore stability by identifying zones prone to caving or swelling.

Well logging services for SP resistivity and gamma-ray logs are integral to the petroleum industry, helping geoscientists and engineers make informed decisions regarding reservoir evaluation, wellbore design, and overall field development strategies. The interpretation of these logs provides a detailed understanding of the subsurface geology and aids in optimizing exploration and production activities.

To carry out the above objectives and survey tasks, we prepare the following equipment:

1. Well, geophysical measuring machine (Karota).
2. DC power supply with voltage 250 v.
3. The coil size is 320m.
4. SP meter set.
5. A sensor measures resistivity.
6. Gama ray measuring sensor.
7. Computer.

The meter has accuracy within the allowable range of well geophysical measurement methods.

Customer consulting about Well logging service?

We will give the best advice to customers to ensure benefits in terms of price, time, and efficiency in exploration and geophysical measurements of Karota wells. Each customer can separately contract for Karota well geophysical measurements, well drilling, and equipment…, or can combine the above services.

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