Applications of Wellsite Chemostratigraphy
Chemostratigraphy was first used at wellsite in the early 2000s but it is rather unfortunate that very little material has been published on the subject, with most articles taking the form of very short papers or conference abstracts. In spite of this, wellsite chemostratigraphy is becoming increasingly popular, as it can be used to provide lithology/bulk mineralogy predictions, stratigraphic control whilst drilling and to aid the placement of casing points, coring points and total depth (TD). Arguably, the most commonly used application, however, is to assist the geosteering/well trajectory monitoring of horizontal-subhorizontal wells drilled in structurally complex plays. Major advances in XRF technology over the last 15 years, particularly with respect to benchtop ED-XRF instruments, has resulted in the ability to generate high quality inorganic geochemical data in ‘near real time’.
- Hildred, G., & Rice, C. (2014). Using high resolution chemostratigraphy to determine well-bore pathways in multilateral drilling campaigns: An example from the Horn River, British Columbia, Canada. In Extended abstract presented at SCPG/CSEG/CWLS GeoConvention 2012, (vision) Calgary TELUS Convention Centre and ERBC Core Research Centre, Calgary, Alberta, Canada, May 14–18th, 2012.Google Scholar
- Marsala, A. F., Loermans, A. M. T., Shen, S., Scheibe, C., & Zereik, R. (2016). Real-time mineralogy, lithology and chemostartigraphy while drilling, using portable energy-dispersive X-ray Fluorescence. Saudi Aramco Journal of Technology (2016 Special Edition).Google Scholar
- Pilcher, J. (2011). Geosteering in unconventional shale reservoirs has potential. E&P online magazine website. www.epmag.com/production-drilling/geosteering-unconventional-shale-reservoirs-potential_80771.
- Schmidt, K., Poole, M., & Hildred, G. (2010). A triumvirate of targeting—a three-pronged approach to keeping a horizontal well in the desired Eagle Ford reservoir interval. In American Association of Petroleum Geologists, International Annual Convention & Exhibition, September 12–15, 2010.Google Scholar