Lessons Learned from the First Openhole Horizontal Well Water Shutoff Job 
Using Two New Polymer Systems - A Case History from Wafra Ratawi Field, Kuwait

Uddin, Shahab; Dolan, Jimmy; Chona, Ricardo; Gazi, Naz H.; Ken, Monteiro; Al-Rubaiyea, Jamal; Anwar, Al-Sharqawi

doi:10.2523/81447-ms

Cited by 1 publication

(4 citation statements)

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“…Nevertheless, the retarding mechanism in the presence of oil and formation water needs further study. (3) the OBCS has a high-quality SIBA. Therefore, the OBCS could primarily enter and effectively block water layers with high-permeability fractures, which made the relative production of liquid drop dramatically.…”

Section: ■ Associated Contentmentioning

confidence: 99%

“…2 Excessive water production can result from either a problem of the well (mechanical failure) or other reasons related to the reservoir, for instance, water channeling from water table to the well through natural fractures, hydraulic/acid fractures or faults, water breakthrough in high-permeability zones, or water coning. 2,3 With most fields depleting and new field developments largely adopting horizontal and high-angle well completions, water control is one of the most pressing issues facing operators worldwide. 4 The water shut-off technique conducted appropriately is an effective method for treating excessive water production.…”

Section: Introductionmentioning

confidence: 99%

“…0#diesel was provided by one of the filling stations of China National Petroleum Corporation (CNPC). Crude oil (12 mPa•s, 0.856 g/cm 3 , at 50 °C and 1 atm) and formation water with high salinity (≥200 000 ppm) were obtained from Tahe oilfield (Tarim Basin, China), Sinopec Northwest Company, China.…”

Section: Introductionmentioning

confidence: 99%

“…The annual cost of disposing of this water is approximately $5–10 billion in the U.S. and approximately $40 billion worldwide . Excessive water production can result from either a problem of the well (mechanical failure) or other reasons related to the reservoir, for instance, water channeling from water table to the well through natural fractures, hydraulic/acid fractures or faults, water breakthrough in high-permeability zones, or water coning. , With most fields depleting and new field developments largely adopting horizontal and high-angle well completions, water control is one of the most pressing issues facing operators worldwide …”

Section: Introductionmentioning

confidence: 99%

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Performance of Oil-Based Cement Slurry as a Selective Water-Plugging Agent in High-Temperature and High-Salinity Cave-Fractured Carbonate Reservoirs

Yuan

Jin

et al. 2014

Ind. Eng. Chem. Res.

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Excessive water production has been one of the most pressing issues facing oilfields worldwide. The low-level success rate caused by complicated well and reservoir conditions drives the development of an effective selective blocking agent that is suited to a simple plugging technique. In this study, we present a novel selective blocking agent that is oil-based cement slurry (OBCS) mainly composed of 0#diesel, crude oil, class G oil well cement, silica fume, a wetting and dispersing agent (sodium alcohol ether sulfate (AES)), and a retarder GH-9 (a copolymer of 2-acrylamido-2-methyl propane sulfonic acid and itaconic acid). The effectiveness of AES and the compatibility of AES and GH-9 when coexisting in the suspension system were investigated by microscopic experiments. The hydrated phases of the OBCS at 130 °C and high salinity (210 000 ppm) formation water were analyzed by X-ray powder diffraction (XRD). Thermogravimetry/differential scanning calorimetry (TG/DSC) was employed to study the products and content (mainly calcium hydroxide (CH)). The water-plugging performance of the OBCS was studied by carrying out core physical simulation experiments. XRD analysis reveals the presence of CH, calcium silicate hydrate (two types, Ca2SiO4H2O and Ca6Si3O12H2O), ettringite, killalaite, and Xonotlite. Although TG/DSC analysis fails to calculate the content of CH as expected, it gives an indication that oil exists in the set cement. The results of the microscopic experiments show a good effectiveness of AES and compatibility of AES and GH-9. High-quality plugging performances were observed in core physical simulation experiments. The properties tested indicate that the OBCS is a promising prospect as a selective blocking agent for water treatment in high-temperature and high-salinity cave-fractured carbonate reservoirs.

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Section: ■ Associated Contentmentioning

confidence: 99%