Bone Spring Sandstones Study

Core Laboratories has conducted a regional study of the Permian, Bone Spring Formation in Eddy and Lea Counties, New Mexico to provide geologic, petrographic and petrophysical data for improved formation evaluation of the Bone Spring sandstones. Included in this study are fourteen (14) wells from which both conventional and rotary sidewall cores were supplied. Production data suggests that wells completed in these horizons may have recoverable reserves of 200,000 to 500,000 BO and 0.5 to 3.0 GCFG. In order to properly exploit the vast potential of these reservoirs, improved formation evaluation techniques are required.

Standard log evaluation techniques may fail to consistently identify Bone Springs pay sands which commonly have low resistivities, low permeabilities, and high calculated water saturations. As a result, the primary objective of this study is to improve formation evaluation by providing operators with key formation evaluation parameters measured from numerous cores and by correlating these data to log response. The extensive database created for this study includes: detailed core descriptions, core photographs, routine and sidewall core analysis reports, petrographic data, basic rock property measurements, special core analysis test results, rock-fluid compatibility test results, and digital well log files. In this fashion, pay and non-pay criteria are established, resulting in improved formation evaluation. The comprehensive final report includes all generated and supplied data, as well as an interpretation and synthesis of the data directed specifically towards improving formation evaluation.

• Fourteen (14) wells
• Conventional and rotary sidewall cores
• Lea and Eddy Counties, New Mexico