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* [http://tao.cgu.org.tw/pdf/v184p739.pdf Use as maturity indicator - example]

...ref> or kerogen containing high sulfur concentration and is not a reliable indicator of maturity for these kerogen types.

Gross trends of hydrogen indices (HIs) can be used as a maturation indicator. The hydrogen index is calculated from Rock-Eval data using the following f

...ectance]] (V_r or R_o), the most commonly used thermal indicator, is the benchmark for maturation studies in the petroleum and coal industri ...he, I., McKenna, T., C., 1991, Pollen translucency as a thermal maturation indicator: Journal of Petroleum Geology, vol. 14, no. 1, p. 19–36, DOI: 10.1111/jpg

...es might be porosity (φ), oil saturation (S₀), and a binary indicator (I) set equal to 1 or 0 depending on whether the sample location belongs to ...spatial distribution of the three variables porosity, oil saturation, and indicator of formation presence can be modeled by three, usually interdependent, rand

...es a photoelectron (P_e) [[cross section]] curve, an independent indicator of lithology.

...nd flow unit 2 has a porosity of 10%. The variance in porosity becomes the indicator of the contrast in pore throat size when converted to port size. For flow u

...ime is kept in real time on every drilling rig. It is often the very first indicator of changing downhole conditions.

...eoenvironment indicator i.e. open marine conditions but lacks water depth indicator due to their wider range of water depth adaptation (float on the sea, unlik

| [[Permeability]] and moved hydrocarbon indicator; estimate ''R''_''xo'' || No oil-based muds | Microlaterolog || 2 in. || 4 in. || Permeability and moved hydrocarbon indicator; estimate ''R''_''xo'' || No oil-based muds

...enrichment and well production. High pressure coefficient is an effective indicator for good gas preservation conditions. In summary, the combination of high T

...will increase the water saturation. Shale volume could also be used as an indicator of zone of interest or not, many users usually will not classify a formatio ...very low, it is called dim spot, both of them could be used as hydrocarbon indicator.

...ient alone or in combination to invalidate the total hydrocarbon log as an indicator of gas-filled porosity in the formation. It does mean, however, that care m

...ant in engineering applications. P wave to S wave velocity ratio is a good indicator for lithology, and borehole S wave velocity information is necessary for ti

...g the life of a reservoir, and periodic mapping can serve as a performance indicator for reservoir management. A variety of performance features can be indicate ...]]. Cumulative production can also be mapped periodically as a performance indicator signaling areas of the reservoir that may be responding in a manner seeming

...ed” at periodic ton-miles to distribute the line wear and stress. A weight indicator (16) is attached to the drill line so that the driller can measure the [[dr

...egion. The Amott method is more sensitive in this area and may be a better indicator. The Amott method can also be used to indicate mixed wettability if a sampl

The productivity index can be a useful indicator of well productivity and wellbore condition during the life of a well. PI w

# ''LR'' (lambda-rho)= good fluid indicator as it is sensitive to the change in fluid content. Lambda (Lamé parameter)

...xotic deep cement. Exotic mineral cement and mineralized joints become the indicator of new permeability, followed by migration of mineralization fluid. Exotic

...ow (AOF)'' and is often designated as ''q''_max. AOF is a useful indicator of well productivity.

...potential|spontaneous potential]] log is most often used as a qualitative indicator of the permeability of a formation. (For more on wireline log response to r

...ier hydrocarbons. If a stained sample does not fluoresce or cut, then this indicator is classified as thermally “dead oil” and is not considered a show. Sta

...ily made, although a gas-oil ratio of about 750 SCF/STB is probably a good indicator (black oils have lower GORs). Volatile oils may have GORs up to 2500 SCF/ST

...oirs. It is very sensitive to gas, and consequently, it is useful as a gas indicator in conjunction with the density measurement. It can also be used with densi

...role in different stages of the hydrocarbon cycle and it is the very first indicator of hydrocarbons presence in the reservoir provided by the mud gas data. For

...s. [[Basic open hole tools#Gamma ray|Gamma ray]] logs are therefore a good indicator of [[mineralogy]].

...ime consuming. An incoherence function is output which is usually a useful indicator of the reliability of the answer (low incoherence is good). These programs

...ty ranking scheme, database description and analysis guidelines for stress indicator: World Stress Map Technical Report 16-01</ref> and Morawietz et al.<ref>Mor

...me=Smag>Smagala, T. M., C. A. Brown, and G. L. Nydegger, 1984, Log-derived indicator of thermal maturity, Niobrara Formation, Denver Basin, Colorado, Nebraska,