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Title: APPLICATION OF RESERVOIR CHARACTERIZATION AND ADVANCED TECHNOLOGY TO IMPROVE RECOVERY AND ECONOMICS IN A LOWER QUALITY SHALLOW SHELF SAN ANDRES RESERVOIR

The OXY-operated Class 2 Project at West Welch is designed to demonstrate how the use of advanced technology can improve the economics of miscible CO{sub 2} injection projects in lower quality Shallow Shelf Carbonate reservoirs. The research and design phase (Budget Period 1) primarily involved advanced reservoir characterization. The current demonstration phase (Budget Period 2) is the implementation of the reservoir management plan for an optimum miscible CO{sub 2} flood design based on the reservoir characterization. Although Budget Period 1 for the Project officially ended 12/31/96, reservoir characterization and simulation work continued during the Budget Period 2. During the seventh annual reporting period (8/3/00-8/2/01) covered by this report, work continued on interpretation of the interwell seismic data to create porosity and permeability profiles which were distributed into the reservoir geostatistically. The initial interwell seismic CO{sub 2} monitor survey was conducted and the acquired data processed and interpretation started. Only limited well work and facility construction were conducted in the project area. The CO{sub 2} injection initiated in October 1997 was continued, although the operator had to modify the operating plan in response to low injection rates, well performance and changes in CO{sub 2} supply. CO{sub 2} injection was focused inmore » a smaller area to increase the reservoir processing rate. By the end of the reporting period three producers had shown sustained oil rate increases and six wells had experienced gas (CO{sub 2}) breakthrough.« less
Authors:
Publication Date:
OSTI Identifier:
835077
DOE Contract Number:
FC22-94BC14990
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 5 May 2003
Research Org:
OXY USA Inc. (US)
Sponsoring Org:
(US)
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; ECONOMICS; MONITORS; PERFORMANCE; PERMEABILITY; POROSITY; COMPUTERIZED SIMULATION; RESERVOIR ENGINEERING; SITE CHARACTERIZATION; CARBON DIOXIDE INJECTION; OIL FIELDS; ENHANCED RECOVERY; PETROLEUM