1887

Abstract

Temperature profiles may be constructed for use in evaluating smectite to illite conversion, or simply applied to a well of interest by utilizing rhob density wireline data, or any continuous velocity-depth profile transformed to density-depth and then porosity. Thermal conductivities of brine & shale matrix (end-members) are input from a transformed continuous density-depth profile, proportional to the porosity or void ratio. In this manner, a variable 1D k-z profile can be constructed from a porosity profile derived from density-depth. Where applicable, thermal conductivities of salt (or other lithologies) can then be inserted into the profile and the local heat flow adjusted to match the span of corrected and uncorrected bottom hole temperatures (BHT) and/or MDT fluid temperatures. The raw BHT can be used as a low-side calibration point and corrections between the raw input and any Horner-type correction, if available, can be used to position the high-side; otherwise, BHT +10% can be used as a reasonable corrected BHT estimate. This method can also be more accurate than temperature estimates derived from a 1D basin model, which typically do not include temporal effects around large salt bodies, but can be included in the variable 1D k-z profile derived from density-depth.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201700064
2017-03-19
2024-03-28
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201700064
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error