In the complete KTB-VB and in in the KTB-HB down to a depth of 3003 m the gas phase was released and collected by twirl degassers attached in front of the mud shakers. This open system led to gas losses as well as air contamination. Therefore results obtained down to this depth have only qualitative character. After casing the KTB-HB to a depth of 3003 m a bypass system was installed at the BOP (blow-out preventer) 50 cm below the flow line. A constant part (about 100 l/min) of gas-bearing drill mud is pumped through the bypass directly to a twirl degasser which is isolated against atmosphere. To prevent air contamination or sucking off drill mud the pressure in the gas trap is balanced by charging argon. The released gas phase is completely sucked off and led through a heated hose (in order to prevent water condensation or freezing) to the logging unit and there parallel to the measuring systems gaschromatograph, mass spectrometer and radon logging device.
In the complete KTB-VB and in in the KTB-HB down to a depth of 3003 m the gas phase was released and collected by twirl degassers attached in front of the mud shakers. This open system led to gas losses as well as air contamination. Therefore results obtained down to this depth have only qualitative character. After casing the KTB-HB to a depth of 3003 m a bypass system was installed at the BOP (blow-out preventer) 50 cm below the flow line. A constant part (about 100 l/min) of gas-bearing drill mud is pumped through the bypass directly to a twirl degasser which is isolated against atmosphere. To prevent air contamination or sucking off drill mud the pressure in the gas trap is balanced by charging argon. The released gas phase is completely sucked off and led through a heated hose (in order to prevent water condensation or freezing) to the logging unit and there parallel to the measuring systems gaschromatograph, mass spectrometer and radon logging device.
In the complete KTB-VB and in in the KTB-HB down to a depth of 3003 m the gas phase was released and collected by twirl degassers attached in front of the mud shakers. This open system led to gas losses as well as air contamination. Therefore results obtained down to this depth have only qualitative character. After casing the KTB-HB to a depth of 3003 m a bypass system was installed at the BOP (blow-out preventer) 50 cm below the flow line. A constant part (about 100 l/min) of gas-bearing drill mud is pumped through the bypass directly to a twirl degasser which is isolated against atmosphere. To prevent air contamination or sucking off drill mud the pressure in the gas trap is balanced by charging argon. The released gas phase is completely sucked off and led through a heated hose (in order to prevent water condensation or freezing) to the logging unit and there parallel to the measuring systems gaschromatograph, mass spectrometer and radon logging device.
In the complete KTB-VB and in in the KTB-HB down to a depth of 3003 m the gas phase was released and collected by twirl degassers attached in front of the mud shakers. This open system led to gas losses as well as air contamination. Therefore results obtained down to this depth have only qualitative character. After casing the KTB-HB to a depth of 3003 m a bypass system was installed at the BOP (blow-out preventer) 50 cm below the flow line. A constant part (about 100 l/min) of gas-bearing drill mud is pumped through the bypass directly to a twirl degasser which is isolated against atmosphere. To prevent air contamination or sucking off drill mud the pressure in the gas trap is balanced by charging argon. The released gas phase is completely sucked off and led through a heated hose (in order to prevent water condensation or freezing) to the logging unit and there parallel to the measuring systems gaschromatograph, mass spectrometer and radon logging device.
In the complete KTB-VB and in in the KTB-HB down to a depth of 3003 m the gas phase was released and collected by twirl degassers attached in front of the mud shakers. This open system led to gas losses as well as air contamination. Therefore results obtained down to this depth have only qualitative character. After casing the KTB-HB to a depth of 3003 m a bypass system was installed at the BOP (blow-out preventer) 50 cm below the flow line. A constant part (about 100 l/min) of gas-bearing drill mud is pumped through the bypass directly to a twirl degasser which is isolated against atmosphere. To prevent air contamination or sucking off drill mud the pressure in the gas trap is balanced by charging argon. The released gas phase is completely sucked off and led through a heated hose (in order to prevent water condensation or freezing) to the logging unit and there parallel to the measuring systems gaschromatograph, mass spectrometer and radon logging device.
In the complete KTB-VB and in in the KTB-HB down to a depth of 3003 m the gas phase was released and collected by twirl degassers attached in front of the mud shakers. This open system led to gas losses as well as air contamination. Therefore results obtained down to this depth have only qualitative character. After casing the KTB-HB to a depth of 3003 m a bypass system was installed at the BOP (blow-out preventer) 50 cm below the flow line. A constant part (about 100 l/min) of gas-bearing drill mud is pumped through the bypass directly to a twirl degasser which is isolated against atmosphere. To prevent air contamination or sucking off drill mud the pressure in the gas trap is balanced by charging argon. The released gas phase is completely sucked off and led through a heated hose (in order to prevent water condensation or freezing) to the logging unit and there parallel to the measuring systems gaschromatograph, mass spectrometer and radon logging device.
The porosity was determined using the most common Archimedian method (Schopper, 1982). It is based on the following three weight determinations of the sample: (1) The samples were dried for approximately 100 hours at 80 °C in an oven until the sample weight remains constant. The pore space is filled with air. (2) The samples were saturated, i.e. the pore space was completely filled with destilled water. Therefore, at room temperature and under vacuum the samples were submerged in destilled water for at least 24 hours. Afterwards atmospheric pressure was applied for at least 24 hours to let the water invade into the sample. The sample was taken from the water and the fluid film on the sample surface was removed. (3) At least, the saturated samples were submerged again in destilled water and the third measurement was done. An apparent mass due to buoyancy was determined.
The porosity was determined using the most common Archimedian method (Schopper, 1982). It is based on the following three weight determinations of the sample: (1) The samples were dried for approximately 100 hours at 80 °C in an oven until the sample weight remains constant. The pore space is filled with air. (2) The samples were saturated, i.e. the pore space was completely filled with destilled water. Therefore, at room temperature and under vacuum the samples were submerged in destilled water for at least 24 hours. Afterwards atmospheric pressure was applied for at least 24 hours to let the water invade into the sample. The sample was taken from the water and the fluid film on the sample surface was removed. (3) At least, the saturated samples were submerged again in destilled water and the third measurement was done. An apparent mass due to buoyancy was determined.
The porosity was determined using the most common Archimedian method (Schopper, 1982). It is based on the following three weight determinations of the sample: (1) The samples were dried for approximately 100 hours at 80 °C in an oven until the sample weight remains constant. The pore space is filled with air. (2) The samples were saturated, i.e. the pore space was completely filled with destilled water. Therefore, at room temperature and under vacuum the samples were submerged in destilled water for at least 24 hours. Afterwards atmospheric pressure was applied for at least 24 hours to let the water invade into the sample. The sample was taken from the water and the fluid film on the sample surface was removed. (3) At least, the saturated samples were submerged again in destilled water and the third measurement was done. An apparent mass due to buoyancy was determined.
The porosity was determined using the most common Archimedian method (Schopper, 1982). It is based on the following three weight determinations of the sample: (1) The samples were dried for approximately 100 hours at 80 °C in an oven until the sample weight remains constant. The pore space is filled with air. (2) The samples were saturated, i.e. the pore space was completely filled with destilled water. Therefore, at room temperature and under vacuum the samples were submerged in destilled water for at least 24 hours. Afterwards atmospheric pressure was applied for at least 24 hours to let the water invade into the sample. The sample was taken from the water and the fluid film on the sample surface was removed. (3) At least, the saturated samples were submerged again in destilled water and the third measurement was done. An apparent mass due to buoyancy was determined.
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