Log interpretation and rock power experiment for determining oil saturation by oil and gas reserves

Oil and gas reserves determination method

Fourth, the oil saturation determination method

(2) Log interpretation and rock power experiment to determine the original oil saturation

Due to the high cost of drilling the oil-based mud core and the closed core well, the process is complicated and it is impossible to drill a large amount. Generally, an oil zone (such as Daqing Oilfield) has only a few wells. Most small oil fields do not have direct data on the original oil saturation. Therefore, it is necessary and important to use logging data to explain or log interpretation based on rock and electric experiments.

1. Logging explains the theoretical basis of oil saturation

The use of electrical logging data to explain oil saturation has been largely in the framework of interpretation theory established by Archie in experimental data for more than half a century of logging geology, ie, resistivity (or The conductivity and porosity information are dominant, and the oil saturation is indirectly evaluated by the experimental parameters of the rock power. The Archie formula is written in the form of conductivity:

(1) It is the most effective and reliable method to determine the water or reservoir edge and bottom water analysis data produced by actual reservoirs.

(2) Estimate the resistivity of formation water in the same area or oil and gas field with the statistical variation of the buried depth of the stratum.

There are other methods, but they are more common when used in reserve calculations.

5. According to the statistics of oil-based mud or closed coring data, the reservoir oil saturation interpretation plate or related empirical formula is used to find the oil reservoirs with little change in reservoir lithology and physical properties. The logging resistivity can effectively reflect the change of oil saturation. In the oil-based mud and closed core section, the statistical relationship between the oil saturation and the resistivity log can be established experimentally. At this time, the resistivity log value can be selected as a single item or multiple items. Combined, as long as the statistical correlation is good and easy to operate. The ideal method is based on the Archie formula, based on the water saturation, porosity and log resistivity of the core section, statistical regression to determine other parameters, and then establish a log interpretation saturation formula.

In addition, according to the determinants of oil saturation of the reservoir, such as permeability, porosity, oil-bearing height and oil-water interfacial tension, from the oil-based mud core or closed coring data, the water saturation can be statistically determined with these parameters. Correlation, using the parameters of the common coring well, indirectly determine the oil saturation of the same or similar comparable reservoir.

Chemical Storage Tank can be used in chemical or laboratory. Pullylon made chemical storage tanks by stainless steel or carbon steel with inner anti-corrosion layer. We undertake fabrication of both underground and above ground, horizontal and vertical tanks of various capacities. Chemical storage tanks are in the high resistance design needed for long term storage. They are can be used to store hazardous and flammable liquids.


Pullylon engineers provide all phases help on the product, including initial engineering, layout design, fabrication and final testing. Every product is made by strict quality standard.


Product Range 

Design Code

ASME Section VIII,Div I,API standard,China standard

Pressure

Up to 20Mpa

Temperature

-20℃-400℃

Capacity

Up to 200M3(2,000,000 Liters water volume )

Diameter

Up to 5 meters

Shell&Head Thk

Up to 100mm

Weight

Up to 100 tons

Length

Up to 50 meters,with suitable field joints

 checmial storage tank

If you have any questions, please contact with us directly, Pullylon has been manufacturing the Storage Tank for more than 20 years, and our products have been exported to many factories, such as US, Russia, Singapore, Australia, Malaysia and so on. Welcome you can visit our Factory. For inquiry, Please send mail directly to us.



Chemical Storage Tank

Chemical Storage Tank,Carbon Steel Chemical Storage Tank,Cryogenic Tank Chemical Storage,Chemical Container Storage Tank

Shandong Pulilong Pressure Vessel Co.,Ltd , https://www.pullylon.com