RE:RE:RE:game changer... I believe the differance between Oi Goaweigh, I appreciate your contributions to this site and in return may be able to add a little insight to your oil vs gas dilemma. It's been 5+ yrs since my last post so bear with me. Your description was not too far off re. the importance of heat. Source rocks do need a threshold temperature to convert kerogen (organics) to hydrocarbons. A most important factor to the oil vs gas question is the composition of the organics and their (hydrogen index = HI). A type I source rock has a high HI, is very prone to producing oil and is normally derived from organics that settle to the ocean floor from organisms that lived in the ocean. A type II source rock will have a mix of terrestrial organics(leaves & twigs) and marine organics and will produce a mix of oil and gas dependent again on the HI richness. TYPE III source rocks have low HI and high oxygen index and will generally produce dryer gas. Google "Rock Eval" for diagrams and more detail. Google Archie, Talukdar,Persad etc. for geochemical papers dealing with the Trinidad source rocks and their maturation.
As you might guess the Upper Cretaceous Naparima Hills/Gautier source rocks in Trinidad are generally type II and capable of producing both oil and gas dependent in part on the HI and the temperature of the maturing source rock. As a ballpark estimate the temperature of the reservoirs and source rock on the Ortoire block can be very roughly estimated as 20 deg C (surface intercept) plus 20deg C times depth in 1000 meters. So if the Naparima Hills is buried to 5000 meters a VERY Very ROUGH estimate of its temperature would be 20 + (20*5) = 120 deg C...which is approximately the temperature that some source rocks can begin to generate gas vs oil. Actual temperature vs depth profiles are measured by the drilling company but I have not seen temperature reading vs depth at Coho, Cascadura or Chinook. The oil "window" is roughly between 80 deg C and 120-140 deg C dependent on HI richness etc. Depths will vary greatly even within the same basin dependent on thermal/HI variation as per the attached link.
https://images.app.goo.gl/GTrLcQZcpZCK4Swx6
In addition later generated gas can displace oil from an earlier formed oil trap. So you can see Touchstone's prediction of oil vs gas at Cascadura is an understandable 'mistake'. Very heavy mud weights used in prior drilling can also mask the nature of contained hydrocarbons.
Unfortunately oil vs gas prediction is occasionally more Picasso then Renoir.