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Title: DEVELOPMENT OF BYPASSED OIL RESERVES USING BEHIND CASING RESISTIVITY MEASUREMENTS

Abstract

Tubing and rods of the S.P. Pedro-Nepple No.1 well were pulled and the well was prepared for running of Schlumberger's Cased Hole Formation Resistivity Tool (CHFR) in selected intervals. The CHFR tool was successfully run and data was captured. The CHFR formation resistivity readings were compared to original open hole resistivity measurements. Separation between the original and CHFR resistivity curves indicate both swept and un-swept sand intervals. Both watered out sand intervals and those with higher remaining oil saturation have been identified. Due to the nature of these turbidite sands being stratigraphically continuous, both the swept and unswept layers have been correlated across to one of the four nearby offset shallow wells. As a result of the cased hole logging, one well was selected for a workover to recomplete and test suspected oil saturated shallow sand intervals. Well S.P. Pedro-Nepple No.2 was plugged back with cement excluding the previously existing production interval, squeeze cemented behind casing, selectively perforated in the shallower ''Bell'' zone and placed on production to develop potential new oil reserves and increase overall well productivity. Prior workover production averaged 3.0 BOPD for the previous six-months from the original ''Meyer'' completion interval. Post workover well production was increasedmore » to 5.3 BOPD on average for the following fifteen months. In December 2005, a bridge plug was installed above the ''Bell'' zone to test the ''Foix'' zone. Another cement squeeze was performed behind casing, selectively perforated in the shallower ''Foix'' zone and placed on production. The ''Foix'' test has produced water and a trace of oil for two months.« less

Authors:
;
Publication Date:
Research Org.:
Terra Exploration and Production Company
Sponsoring Org.:
USDOE
OSTI Identifier:
887493
DOE Contract Number:
FG26-03NT15435
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; CEMENTS; OIL SATURATION; PRODUCTION; PRODUCTIVITY; SAND; WATER

Citation Formats

Michael G. Conner, and Jeffrey A. Blesener. DEVELOPMENT OF BYPASSED OIL RESERVES USING BEHIND CASING RESISTIVITY MEASUREMENTS. United States: N. p., 2006. Web. doi:10.2172/887493.
Michael G. Conner, & Jeffrey A. Blesener. DEVELOPMENT OF BYPASSED OIL RESERVES USING BEHIND CASING RESISTIVITY MEASUREMENTS. United States. doi:10.2172/887493.
Michael G. Conner, and Jeffrey A. Blesener. Sun . "DEVELOPMENT OF BYPASSED OIL RESERVES USING BEHIND CASING RESISTIVITY MEASUREMENTS". United States. doi:10.2172/887493. https://www.osti.gov/servlets/purl/887493.
@article{osti_887493,
title = {DEVELOPMENT OF BYPASSED OIL RESERVES USING BEHIND CASING RESISTIVITY MEASUREMENTS},
author = {Michael G. Conner and Jeffrey A. Blesener},
abstractNote = {Tubing and rods of the S.P. Pedro-Nepple No.1 well were pulled and the well was prepared for running of Schlumberger's Cased Hole Formation Resistivity Tool (CHFR) in selected intervals. The CHFR tool was successfully run and data was captured. The CHFR formation resistivity readings were compared to original open hole resistivity measurements. Separation between the original and CHFR resistivity curves indicate both swept and un-swept sand intervals. Both watered out sand intervals and those with higher remaining oil saturation have been identified. Due to the nature of these turbidite sands being stratigraphically continuous, both the swept and unswept layers have been correlated across to one of the four nearby offset shallow wells. As a result of the cased hole logging, one well was selected for a workover to recomplete and test suspected oil saturated shallow sand intervals. Well S.P. Pedro-Nepple No.2 was plugged back with cement excluding the previously existing production interval, squeeze cemented behind casing, selectively perforated in the shallower ''Bell'' zone and placed on production to develop potential new oil reserves and increase overall well productivity. Prior workover production averaged 3.0 BOPD for the previous six-months from the original ''Meyer'' completion interval. Post workover well production was increased to 5.3 BOPD on average for the following fifteen months. In December 2005, a bridge plug was installed above the ''Bell'' zone to test the ''Foix'' zone. Another cement squeeze was performed behind casing, selectively perforated in the shallower ''Foix'' zone and placed on production. The ''Foix'' test has produced water and a trace of oil for two months.},
doi = {10.2172/887493},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 02 00:00:00 EST 2006},
month = {Sun Apr 02 00:00:00 EST 2006}
}

Technical Report:

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  • Tubing and rods of the S.P. Pedro-Nepple No.1 well were pulled and the well was prepared for running of Schlumberger's Cased Hole Formation Resistivity Tool (CHFR) in selected intervals. The CHFR tool was successfully run and data was captured. The CHFR formation resistivity readings were compared to original open hole resistivity measurements. Separation between the original and CHFR resistivity curves indicate both swept and un-swept sand intervals. Both watered out sand intervals and those with higher remaining oil saturation have been identified. Due to the nature of these turbidite sands being stratigraphically continuous, both the swept and unswept layers havemore » been correlated across to one of the four nearby offset shallow wells. As a result of the cased hole logging, one well was selected for a workover to recomplete high oil saturated shallow sand intervals. During the second report period, well S.P. Pedro-Nepple No.2 was plugged back with cement excluding the previously existing production interval, squeeze cemented behind casing, selectively perforated in the shallower ''Bell'' zone and placed on production to develop potential new oil reserves and increase overall well productivity. Prior workover production averaged 3.0 BOPD for the previous six-months. Post workover well production was marginally increased to 3.7 BOPD on average for the following six months.« less
  • Tubing and rods of the S.P. Pedro-Nepple No.1 well were pulled and the well was prepared for running of Schlumberger's Cased Hole Formation Resistivity Tool (CHFR) in selected intervals. The CHFR tool was successfully run and data was captured. The CHFR formation resistivity readings were compared to original open hole resistivity measurements. Separation between the original and CHFR resistivity curves indicate both swept and un-swept sand intervals. Both watered out sand intervals and those with higher remaining oil saturation have been identified. Due to the nature of these turbidite sands being stratigraphically continuous, both the swept and unswept layers havemore » been correlated across to one of the four nearby offset shallow wells. As a result of the cased hole logging, one well was selected for a workover to recomplete and test suspected oil saturated shallow sand intervals. Well S.P. Pedro-Nepple No.2 was plugged back with cement excluding the previously existing production interval, squeeze cemented behind casing, selectively perforated in the shallower ''Bell'' zone and placed on production to develop potential new oil reserves and increase overall well productivity. Prior workover production averaged 3.0 BOPD for the previous six-months from the original ''Meyer'' completion interval. Post workover well production was increased to 5.3 BOPD on average for the following fifteen months. In December 2005, a bridge plug was installed above the ''Bell'' zone to test the ''Foix'' zone. Another cement squeeze was performed behind casing, selectively perforated in the shallower ''Foix'' zone and placed on production. The ''Foix'' test has produced water and a trace of oil for two months.« less
  • The primary objective of the project was to develop a predictive method for locating Pockets of bypassed mobile oil and estimating the volume of this resource. A secondary objective of the project was to transfer the learned technology to small independent operators who drill a majority of the domestic wells but lack access to a research staff. Another objective was to develop a format for compiling data on Louisiana reservoirs in a form that can be used by government and industry to evaluate the resource and plan future activities. The format developed will be demonstrated using data compiled in themore » bypassed oil study for selected reservoirs. The project was being funded over a three-year period and was jointly funded by the DOE and the state of Louisiana. The objectives of the project were accomplished using an interdisciplinary approach which included the disciplines of engineering, geology, and computer science. The work was organized into the following major tasks: Selection of reservoirs for study of bypassed oil potential; development of improved reservoir simulator for bypassed oil prospecting; an interdisciplinary reservoir characterization study of Louisiana reservoirs; active modelling of bypassed oil for three Louisiana reservoirs; and technology transfer activities.« less
  • This focus of this project is to consider the enhanced recovery of petroleum from the Dundee deposit using horizontal wells. Evaluation wells are being drilled. This report contains summaries of administrative aspects of the project and a discussion of software developed for the project.
  • Well data, including drillers` logs, wireline logs, and seismic data, from the Crystal and 3 0 other Dundee oil fields in the Michigan basin have been acquired. Digitized logs of 336 wells that currently produce or have produced from the Dundee Formation in the seven-county study area have been purchased from Maness Petroleum Company. The data-gathering phase of the well-log program is now complete. Well-log analysis using TerraSciences TerraStation software has begun. Detailed analyses of wells with modem logs are being made using density/porosity and Pickett crossplots. Water saturations were calculated for several wells in the past month. Production datamore » have been added to the well-file database. We now have the capability of mapping production as well as geology. Well-location basemaps with permit numbers were constructed for all 30 fields. Contour maps were completed for all 30 fields during the last quarter, including maps: on the top of the Dundee Formation, the top of the Dundee porosity zone (which is well below the top of the Dundee and varies in stratigraphic position throughout most fields), Dundee to Traverse isopachs, and initial production values before and after well treatment. At least two simple computer-generated cross sections were constructed for each field.« less