Fracture detection, mapping, and analysis of naturally fractured gas reservoirs using seismic technology
- Coleman Research Corp., Orlando, FL (United States)
- Lynn (H.) Inc. (United States)
There are a number of producing gas fields in the United States where production is controlled by natural fractures. The host rock may consist of low porosity, low permeability formations, and wells completed in the unfractured rock have low productivity. On the other hand, wells intercepting fractured rocks may show good production. The objective of the research under this contract is to improve the technology for detecting fractures by surface geophysical methods. This remote detection of fractures will allow optimum placement of vertical or horizontal wells. The critical components of the project are: (1) Selection of a gas field with known production from naturally occurring fractures. The project scope does not allow for drilling of wells, so that evidence for occurrence of fractures and gas production from fractures must be obtained from existing wells` field production history, and other data. (2) Acquisition of both surface and downhole seismic P-wave and S-wave data. The project will acquire one 9-component (9-C) VSP. In a 9-C VSP survey, seismic events are recorded by 3-C geophones from one P-wave, and two perpendicular oriented S-wave sources (SH and SV). Also, approximately 12 miles of 9-C surface seismic data will be acquired. (3) Processing and interpretation of 9-C VSP and 9-C surface seismic data, and correlating the seismic anomalies observed to all available geologic and production information to show how the variations in seismic response is related to fracture density, fracture orientation, lithology, structure, and production history.
- Research Organization:
- Coleman Research Corp., Orlando, FL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC21-92MC28135
- OSTI ID:
- 10119909
- Report Number(s):
- DOE/MC/28135-94/C0292; CONF-931156-6; ON: DE94006018; BR: AB0520000
- Resource Relation:
- Conference: Fuels technology contractors` review meeting,Morgantown, WV (United States),16-18 Nov 1993; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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