Advanced Technology To Reduce Water Cut: Case Studies From the PemexSouthern Region (2007)

Advanced Technology To Reduce Water Cut: Case Studies from the Pemex Southern Region Gustavo Alonso Farrera Romo; Gustavo Alonso Farrera Romo Pemex-Exploracion Y Produccion Search for other works by this author on: This Site Google Scholar Hector Hernandez Leyva; Hector Hernandez Leyva Pemex-Exploracion Y Produccion Search for other works by this author on: This Site Google Scholar Raul Bonifacio Aguilar; Raul Bonifacio Aguilar Halliburton Energy Services Search for other works by this author on: This Site Google Scholar Carlos Caballero; Carlos Caballero Halliburton de Mexico, S.A. de C.V. Search for other works by this author on: This Site Google Scholar Larry S. Eoff; Larry S. Eoff Halliburton Energy Services Group Search for other works by this author on: This Site Google Scholar Eldon Dwyann Dalrymple Eldon Dwyann Dalrymple Halliburton Energy Services Group Search for other works by this author on: This Site Google Scholar Paper presented at the International Symposium on Oilfield Chemistry, Houston, Texas, U.S.A., February 2007. Paper Number: SPE-102711-MS https://doi.org/10.2118/102711-MS Published: February 28 2007 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Farrera Romo, Gustavo Alonso, Hernandez Leyva, Hector, Bonifacio Aguilar, Raul, Caballero, Carlos, Eoff, Larry S., and Eldon Dwyann Dalrymple. "Advanced Technology To Reduce Water Cut: Case Studies from the Pemex Southern Region." Paper presented at the International Symposium on Oilfield Chemistry, Houston, Texas, U.S.A., February 2007. doi: https://doi.org/10.2118/102711-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search nav search search input Search input auto suggest search filter All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE International Conference on Oilfield Chemistry Search Advanced Search AbstractThis paper presents the results of a successful application of a new-generation polymeric relative permeability modifier (RPM) that enables treatments to reduce water cut without workover equipment. The new RPM can be bullheaded into open intervals without the need for isolating water zones from hydrocarbon zones. This treatment was applied to several wells in the Pemex southern region. As a result of the treatment, the productive life of the wells has been extended, with a gradual decrease in water cut. These results indicate high potential profitability values for mature fields with high water cut requiring a simple, low-cost treatment without the need for workover equipment or shut-in times. The new treatment can increase the hydrocarbon recovery percentage in sands that in all probability otherwise would be destined for abandonment.This paper describes the treatment methodology, which begins with problem identification and an understanding of the origin of the water breakthrough. Next, the paper describes the new technology, which uses hydrophobically modified water-soluble polymers and explains how applying such polymers can control water selectively. In addition, the detailed execution of the treatment is described, followed by the very positive production results of the treatment. The results of this low-investment, high-profit technology are very promising for other wells under similar conditions in which workovers with conventional technologies would be cost prohibitive.IntroductionThe Cinco Presidentes field is located in Pemex Exploration and Production's (PEP's) southern region (Fig. 1). It consists of tertiary oil-producing sandstones. The well involved in this study is Cinco Presidentes No. 155, completed with a 6 5/8-in. casing at a total depth of 2780 m. The sandstone was perforated in the interval at 1997-2002 m in the Encanto formation with 22% porosity, 17% water saturation, a calculated permeability of 50 md, a reservoir pressure of 2,000 lb/in.2, a static bottomhole temperature of 160°F, and a drainage radius of 100 m.Fig. 1---The Cinco Presidentes field located in PEP's southern region.The interval from 1997-2002 m was perforated on February 24, 2002 with a disintegratable-type gun of 2 1/8 in., 45° phase, 20 charges per meter, with good oil production (166 BOPD, GOR 72.33 m3/m3), and no water production. However, by August 2002, a gradual water cut increase was observed until it reached values close to 85% with the corresponding gradual decrease in oil production down to 57 BOPD due to the increase of the hydrostatic column.Fig. 2 shows the production history of the well. Highlighted is the August 2002 oil rate increase due to the beginning of gas lift in the well. Coincidentally, the water cut, which was initially zero, began to gradually increase, indicating the possibility that the increase in differential pressure favored coning due to the closeness of a dirty sand interbedded with free water. Keywords: Upstream Oil & Gas, adsorption, enhanced recovery, open interval, southern region, conformance improvement, polymer, reduce water cut, relative permeability modifier, application Subjects: Improved and Enhanced Recovery, Formation Evaluation & Management, Conformance improvement This content is only available via PDF. 2007. Society of Petroleum Engineers You can access this article if you purchase or spend a download.