Thinking outside the box Mugz. My thoughts on that below.
The gas kick is basically caused by an overpressure shale cap above the gas bearing sands. NEN used the word 'gas'.
This is a common pattern nxt doors with the multi-sandy zones. Unfortunately as ENI took a kick (ie gas expanding & bubbling up with the circulation mud etc) they wouldnt risk sitting around to log that section.
As an operator U simply kill the well with heavy mud & cement that section, sidetrack & drill ahead with slightly heavy mud weight to avoid a repeat.
At DF, on the wireline logs the porosity & gamma ray curves tie up giving a classic textbook style 'bell & funnel' facies changeover suggesting a shale-sand sequence. So that's the gas kick part, next part is dedicated to CO2.
Whilst I agree with high CO2 at DF field, I havent come across anything on H2S. Yr equation however missed a keypoint, drumroll ..... Methanol
The high CO2% (& N2 to an extent) was seen as a problem at the nearby producing DF field (1-1) ten years back.
DF consists of several satellite blocks, & the main block at DF1-1 is piping CH4 & CO2 flashgas as feedstk & generating commercial levels of Methanol. Talk abt selling ice to the eskimos 'eh. CNOOC already had a plan-B.
Also note that the low CO2 wells at DF13-2, 13-1 r not hooked up yet & present a cleaner option for CNOOC, as these r recent discoveries.
CNOOC r piping the DongFang 1-1 gas onshore to a facility & in Aug2003 installed 2 natural gas decarbonisation systems to treat & recover CH4 & CO2 succesfully. See link below
CO2 serves as feedstk for Methanol production & generates additional revenure for the contract period from 2006-2026. See link below & chk out the 2013 preso.
Lastly, an image showing the existing DF1-1 gas well/pipelines. Perhaps someone can translate the (non English calligraphy) on the diagram. Just my thoughts for now. Look fwd to NEN's nxt release on logged section & gas composition etc.
NEN Price at posting:
34.0¢ Sentiment: Hold Disclosure: Held
