Computerized texture analysis of borehole electrical images from Middle East carbonate reservoirs: A contribution to porosity characterization

Conference · Fri Mar 01 00:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5802985

Delhomme, J P ^[1]; Nurmi, R ^[2]

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1. Etudes et Productions Schlumberger, Clamart (France)
2. Schlumberger, Dubai (United Arab Emirates)

Porosity heterogeneities have been found to be common in carbonate reservoirs and are a major factor affecting fluid flow and recovery efficiency. A review of Middle East and Indian reservoirs reveals that there are four types of heterogeneous fabrics: layered porosity, interwoven porosity, isolated porosity, and isolated nonporous within reservoir zones. Their presence can adversely affect the interpretation, testing, and completion of a well. Electrical imagery is a key to defining the spatial arrangement and orientation of the porosity distribution, or porosity fabric. To assist in the interpretation and quantification of heterogeneous porosity, specialized image analysis techniques have been developed. Although mathematical morphology concepts developed for medical imagery are used, geological imagery has necessitated the development of some original approaches. The initial focus of the computer image analysis is of isolated porosity and also thin porosity layers alternating with nonporous carbonate rock. The 'porosity typing' summary log of the textural analysis of reservoir porosity has a variety of applications, but it is an immediate input for well testing and well completion design. Moreover, as carbonate image fabrics are generally related to depositional and or diagenetic facies, a fabric summary and zonation is also valuable for well-to-well correlation in either reservoir or exploration studies.

• OSTI ID: 5802985
• Report Number(s): CONF-910403-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:3; Conference: Annual meeting of the American Association of Petroleum Geologists (AAPG), Dallas, TX (United States), 7-10 Apr 1991; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
MIDDLE EAST
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
RESERVOIR ROCK
MICROSTRUCTURE
POROSITY
CARBONATE ROCKS
COMPUTERIZED SIMULATION
IMAGE PROCESSING
CRYSTAL STRUCTURE
GEOLOGIC DEPOSITS
MINERAL RESOURCES
PROCESSING
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SIMULATION
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration