Thin Polyacrylamide Gels for Water Control in High-Permeability Production Wells

1991 ◽  
Author(s):  
A. Zaitoun ◽  
R. Rahbari ◽  
N. Kohler
Keyword(s):  
Polyacrylamide Gels ◽  
High Permeability ◽  
Water Control ◽  
Production Wells

Study and Application of In-depth Water Control Technology for Production Wells

2011 ◽  
Vol 29 (24) ◽  
pp. 2568-2577
Author(s):  
D. Caili ◽  
Y. Qing ◽  
G. Qilin ◽  
Z. Fulin
Keyword(s):  
Control Technology ◽  
Water Control ◽  
Production Wells ◽  
Depth Water

An Active Method for Characterization of Flow Units Between Injection/Production Wells by Injection-Rate Design

2011 ◽  
Vol 14 (04) ◽  
pp. 433-445 ◽  
Author(s):  
Kun-Han Lee ◽  
Antonio Ortega ◽  
Amir Mohammad Nejad ◽  
Iraj Ershaghi
Keyword(s):  
Reservoir Characterization ◽  
Injection Rate ◽  
High Permeability ◽  
Injection Wells ◽  
Flow Units ◽  
Weight Factors ◽  
Production Wells ◽  
Preferential Flows ◽  
Injection Rates

Summary This paper presents a novel data-mining method to characterize the flow units between injection and production wells in a waterflood, using carefully implemented variations in injection rates. The method allows the computation of weight factors representing the influence of any of the injectors surrounding a given producer. The weight factors are used to characterize the effective contribution of injection wells to the total gross production in surrounding production wells. A wavelet approach is used to design the perturbation in the injection rates and to analyze the observed variations in the gross production rates. Tracking the contribution of injectors to various producers can help in balancing voidage replacement in waterflood optimization. A second application is reservoir characterization, in which information provided by the proposed procedure can help in mapping high-permeability flow units such as channels and fractures as well as flow barriers between wells. The method was calibrated and tested successfully for simulated line-drive and five-spot patterns with various assumed flow units and flow-heterogeneity conditions. The paper also includes a case study for a tight-formation waterflood in which the weight factors are intended to delineate the pattern of natural high-permeability channels causing preferential flows.

Field vs. Laboratory Polymer-Retention Values for a Polymer Flood in the Tambaredjo Field

2014 ◽  
Vol 17 (03) ◽  
pp. 314-325 ◽  
Author(s):  
R.N.. N. Manichand ◽  
R.S.. S. Seright
Keyword(s):  
Oil Recovery ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
High Permeability ◽  
Permeable Rock ◽  
Polymer Flood ◽  
Production Wells ◽  
Polymer Retention ◽  
Inaccessible Pore Volume

Summary During a polymer flood, polymer retention can have a major impact on the rate of polymer propagation through a reservoir, and consequently on oil recovery. A review of the polymer-retention literature revealed that iron and high-surface-area minerals (e.g., clays) dominate polymer-retention measurements in permeable rock and sand (>100 md). A review of the literature on inaccessible pore volume (IAPV) revealed inconsistent and unexplained behavior. A conservative approach to design of a polymer flood in high-permeability (>1 darcy) sands would assume that IAPV is zero. Laboratory measurements using fluids and sands associated with the Sarah Maria polymer flood in Suriname suggested polymer retention and IAPV values near zero [0±20 μg/g for retention and 0±10% pore volume (PV) for IAPV]. A procedure was developed using salinity-tracer and polymer concentrations from production wells to estimate polymer retention during the Sarah Maria polymer flood in the Tambaredjo reservoir. Field calculations indicated much higher polymer-retention values than those from laboratory tests, typically ranging from approximately 50 to 250 μg/g. Field cores necessarily represent an extremely small fraction of the reservoir. Because of the importance of polymer retention, there is considerable value in deriving polymer retention from field results, so that information can be used in the design of project expansions.

Field Evaluation of a New Gelant for Water Control in Production Wells

1988 ◽  
Author(s):  
M.R. Avery ◽  
T.A. Wells ◽  
P.W. Chang ◽  
J.D. Millican
Keyword(s):  
Field Evaluation ◽  
Water Control ◽  
Production Wells

scholarly journals Production Data Analysis and Sonolog for Determining Artificial Lift Design and Well Characteristic

2020 ◽  
Vol 1 (1) ◽  
pp. 28
Author(s):  
Bambang Bintarto ◽  
Rizky Rahmat Auliya ◽  
Riza Andhika Mahendra Putra ◽  
Afif Surya Pradipta ◽  
Rafli Arie Kurnia
Keyword(s):  
Produced Water ◽  
Submersible Pump ◽  
Water Control ◽  
Injection Wells ◽  
Diagnostic Plot ◽  
Artificial Lift ◽  
Production Wells ◽  
Production History ◽  
Electric Submersible Pump

Tarakan Field, North Kalimantan is a part of PT. Pertamina EP Asset 5. The Tarakan Field has 5 structures in the form of Pamusian, Juata, Sesanip, Mangatal, and Sembakung. The Tarakan Field has 57 production wells and 6 injection wells. The wells at Tarakan field are produced with artificial lifts in the form of Sucker Rod Pump (SRP) totaling 25, Hydraulic Pumping Unit (HPU) totaling 11, Electric Submersible Pump (ESP) totaling 19 and Progressive Cavity Pump (PCP) totaling 2. The determination of artificial lifts is carried out by the design of well characteristics and production history. The design at Tarakan Field was carried out with an artificial lift in the form of ESP (Electric Submersible Pump). ESP is used according to reservoir and formation characteristics in Tarakan Field. Water Control Diagnostic Plot is a method used to analyze the effect of control on produced water. Water Control Diagnostic plot is plot between WOR and WOR derivative vs time. The plot was carried out on a log-log scale. The plot on the Water Control Diagnostic Plot is then analyzed against the graph created by the KS Chan. So from the analyzed plot, it is found whether or not there is a problem in the well at Tarakan Field. The results of the graph analysis on the well at Tarakan Field on the chart show that the field does not indicate a problem. Keywords: chan plot; design; esp; production

Soluble Fibrin Complexes and Fibrinogen Heterogeneity in Diabetes mellitus

1980 ◽  
Vol 44 (03) ◽  
pp. 130-134 ◽  
Author(s):  
E B Tsianos ◽  
N E Stathakis
Keyword(s):  
Diabetes Mellitus ◽  
Molecular Weight ◽  
Plasma Proteins ◽  
Polyacrylamide Gel Electrophoresis ◽  
Gel Filtration ◽  
Lower Molecular Weight ◽  
Polyacrylamide Gels ◽  
Soluble Fibrin ◽  
Α2 Macroglobulin ◽  
Patients With Diabetes

SummaryThe presence of soluble fibrin complexes (SFC) measured by gel filtration of plasma on 4% agarose columns, fibrinogen heterogeneity on 3.5% SDS-polyacrylamide gels and the concentrations of several plasma proteins were evaluated in 39 patients with diabetes mellitus (DM) and 19 matched control subjects. A small but significant increase of SFC was found in DM (p<0.01). On individual basis 51.2% of the patients had increased SFC (>M + 2 SD of the controls). Polyacrylamide gel electrophoresis of the SFC showed no evidence of cross-linking or proteolysis. Plasma clots formed in the presence of EDTA and trasylol were analysed in SDS-polyacrylamide gels in a normal and two lower molecular weight fibrin bands (band I, II, III). The percentage of band I fibrinogen was in diabetics (65.3 ± 4.7%) lower than that of the controls (71.8 ± 4.5%) (p < 0.01). Fibrinogen levels, antithrombin III, α1-antitrypsin, α2-macroglobulin and plasminogen were significantly increased in DM. We suggest that in DM there is an enhancement of intravascular fibrin formation and accelerated fibrinogen degradation to lower molecular weight forms.

Commissioning brownstock washing controls for an evaporator limited mill

TAPPI Journal ◽  
2016 ◽  
Vol 15 (7) ◽  
pp. 459-464
Author(s):  
RICARDO SANTOS ◽  
PETER HART
Keyword(s):  
Control System ◽  
Negative Impact ◽  
Black Liquor ◽  
Pulp Mill ◽  
Control Program ◽  
Separation Point ◽  
Water Control ◽  
Oxygen Delignification ◽  
Percentage Points

An automated shower water control system has been implemented to reduce the volume and variability of weak black liquor being sent from the pulp mill to the evaporators. The washing controls attempt to balance the need for consistent and low soda carryover to the bleach plant with consistently high weak black liquor solids being sent to the evaporators. The washer controls were implemented on two bleachable grade hardwood lines (one with oxygen delignification, one without oxygen delignification) and one pine line. Implementation of the control program resulted in an increase in black liquor solids of 0.6 percentage points for the hardwood lines. Significant foam reduction was realized on the pine line since the pine black liquor solids were able to be consistently maintained just below the soap separation point. Low black liquor solids excursions to the evaporators were eliminated. Bleach plant carryover was stabilized and no negative impact on chemical consumption was noticed when controlling weak black liquor solids to recovery.

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