Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
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| Title | Chlorites in reservoir sandstones of the Guadalupian Delaware Mountain Group |
| Creator/Author | Walling, S.D. (Texas A and M Univ., College Station (United States)) |
| Publication Date | 1992 Apr 01 |
| OSTI Identifier | OSTI ID: 7195473 |
| Report Number(s) | CONF-9204139-- |
| Other Number(s) | ISSN0149-1423; CODEN: AABUD |
| Resource Type | Conference |
| Specific Type | Journal Article |
| Resource Relation | AAPG Bulletin (American Association of Petroleum Geologists) ; Vol/Issue: 76:4; American Association of Petroleum Geologists (AAPG) Southwest section meeting; 21-24 Apr 1992; Midland, TX (United States) |
| Subject | 020200 -- Petroleum-- Reserves, Geology, & Exploration ;580000 -- Geosciences; CHLORITE MINERALS-- STRUCTURAL CHEMICAL ANALYSIS;PERMIAN BASIN-- PETROLEUM DEPOSITS;PETROLEUM DEPOSITS-- MINERALOGY;PETROLEUM DEPOSITS-- PETROGRAPHY; CLAYS;DIAGENESIS;ELECTRON MICROSCOPY;ENHANCED RECOVERY;GEOLOGIC FORMATIONS;PERMEABILITY;POROSITY;RESERVOIR ENGINEERING;RESERVOIR ROCK;ROCK-FLUID INTERACTIONS;X-RAY DIFFRACTION |
| Related Subject | COHERENT SCATTERING;DIFFRACTION;ENGINEERING;GEOLOGIC DEPOSITS;MICROSCOPY;MINERAL RESOURCES;MINERALS;RESOURCES;SCATTERING;SILICATE MINERALS |
| Description/Abstract | Late-stage authigenic clay minerals are pervasive in the very fine-grained, subarkosic sandstones of the Guadalupian Delaware Mountain Group, comprising up to 10% of the bulk rock.^Thus, reservoir rock properties are influenced by these minerals.^Samples selected from cored intervals, ranging from 600 to 2500 m, were studied using optical and electron microscopy and x-ray diffraction methods to determine the distribution and nature of occurrence of the authigenic clay minerals.^In thin sections, the clay minerals are recognizable as grain coatings, with thickness varying from a few micrometers to tens of micrometers.^A correlation between the morphology and the amount of interstratification has been observed, with more interstratification corresponding to the formless chlorite variety.^The structural and morphological evidence suggests that the chlorites represent different stages of development, possibly evolving from a smectite component through an interstratified intermediate, to a more well-ordered form.^There appears to be no systematic trends vertically or laterally in clay mineralogy.^The importance of understanding the clay mineralogy and chemistry in these sandstones is evident when considering enhanced recovery procedures.^Different clay structures and chemistries may respond differently to production and stimulation techniques.^The proposed chlorite diagenetic sequence suggests that drastic changes in borehole fluid chemistry may cause retrogression of chlorite to some expansive forms, which may be water sensitive or inclined to migration. |
| Country of Publication | United States |
| Language | English |
| Format | Pages: 585 |
| System Entry Date | 2001 May 13 |
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Last Updated: 02/06/2009