Identifying subsurface facies from user-directed computer processing of log and other data
Geologists, reservoir engineers, and log analysts can discern lithology types by inspecting curve shapes on logs. Data obtained from cores, outcrops, and other sources can be correlated with wireline logs to classify log response shapes for each observable facies. The semiautomatic program presented here helps experienced log analysts and geologists identify subsurface facies from wireline and other log data. The program called Facies Analysis Log, was written specifically to address the complex problems of evaluating the Monterey Shale and related formations in California. The program can be used by log analysts and geologists to translate what they know about how geophysical and petrophysical data correspond to logs into a visual description of subsurface facies. Algorithms for the various routines are written so the client may interpose desired algorithms in any of several modular slots, if the algorithm chosen by the interpreter is inaccurate or inadequate. The client also can select the interpretation parameter at any of several interactive steps. The modular nature and semiautomatic features of this program were developed as responses to the growing need to use geologic knowledge quantitatively while evaluating the complex Monterey Shale and surrounding formations. The program is also useful where production can be predicted from several different indicators, but where no indicator is always 100% accurate. In addition, the program stores information about log-facies correlations automatically interprets other zones within a well, or other wells within a field, to describe known facies in areas not as well known as the control area.
- Research Organization:
- Welex, Norwalk, CA
- OSTI ID:
- 6931705
- Report Number(s):
- CONF-8604187-
- Journal Information:
- Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 70:4; Conference: American Association of Petroleum Geologist Pacific Section convention, Bakersfield, CA, USA, 16 Apr 1986
- Country of Publication:
- United States
- Language:
- English
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