Multiple Slug Scaling of Linear and Pattern Laboratory Chemical Floods

Haskin, H.K.; Davis, Lorne A.

doi:10.2118/10715-ms

All Days 1982

DOI: 10.2118/10715-ms

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Multiple Slug Scaling of Linear and Pattern Laboratory Chemical Floods

H.K. Haskin¹,

Lorne A. Davis²

Abstract: of not more than 300 words. Write: 6200 N. Central Expwy., Dallas, TX 75206. ABSTRACTThe screening and design of chemical flood processes requires an understanding of the effects of each chemi ca 1 slug on oil recovery. The concept of volumetric linear scaling can be extended to processes involving the injection of multiple chemical slugs as long as the relative ratios of slug sizes are held constant. This allows fast development of the relation between oil recovery and slug size requirements for each chemical… Show more

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1983

1984

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Cited by 3 publications

References 7 publications

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Computer-Controlled Measurement of Laboratory Areal Flood Saturation Distributions

Davis¹

1983

SPE Annual Technical Conference and Exhibition

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A microcomputer controlled microwave absorption instrument has been developed for automated measurement of laboratory linear and areal flood oil/water saturation distributions. The instrument design and performance characteristics are given in detail, and the roles of micro, mini and mainframe computers in data collection and analysis are described. Much of the design criteria and features are applicable to other oil recovery laboratory experimentation. An applications study is presented in a companion paper, SPE 12038. An error analysis study of experimental saturation distribution data is used to identify localized structured water present in a linear core at residual oil saturation to chemical flood. Comparison is made to the residual microemulsion phase predicted by a simulator study of the experiment.

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Computer-Controlled Measurement of Laboratory Areal Flood Saturation Distributions

Davis¹

1983

SPE Annual Technical Conference and Exhibition

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Observation, Prediction, and Analysis of a Laboratory Two-Well Chemical Flood

Haskin¹

1983

SPE Annual Technical Conference and Exhibition

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The concept of volumetric linear scaling was developed to provide a simple oil recovery prediction procedure that adequately described the important aspects of chemical flooding for single and multiple slug systems. This approach has been used successfully to model several chemical flood systems in both field cores and synthetic rock.1,2 When coupled with a flow description, linear flood oil saturation data have also been used to predict oil recovery performance of laboratory pattern floods.3,4 This simple scaling approach will be used here to describe chemical flood performance in a novel unconfined laboratory flood monitored by a microwave saturation scanner. An unconfined two-well geometry was chosen for study because it provided a severe test of the simple streamtube flow description employed. A two-well pattern also represents the simplest of the class of small isolated patterns sometimes employed in field pilot tests. Interpretation and modeling of these isolated patterns has historically been difficult. Extension of the scaling theory to a two-well pattern would provide the engineer with another tool for analysis of such floods. Ten curvilinear unit mobility streamtubes were employed to describe flow in the laboratory experiment. Predictions of 2-propanol saturations measured during miscible injections in the two-well model were compared to observations to check the validity of the streamtube net. Expected effects of the two-well geometry on oil recovery from the laboratory model are discussed in light of the large variation in size of the individual streamtubes in the flow description. Oil saturation profiles were measured during a linear chemical flood involving injection of a small surfactant slug followed by a small polymer slug and continuous drive brine. These So profiles were then scaled along the unit mobility streamtube net. Oil saturation contours, endpoint conditions, oil breakthrough time, and oil production history predictions were made. Comparison of these predictions to the observed performance of the eight day chemical flood carried out in the large two-well model indicate that the scaling concept can be used to model this type of flood. The fixed streamtube description served as a useful first approximation for the unconfined pattern geometry even in the presence of observable crossflow between stream-tubes.

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A Study of the Relationship Between Surfactant/Oil/Brine System Phase Behavior and Chemical Flood Recovery in Short Cores

Ashrawi¹

1984

All Days

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This study correlates the phase behavior of surfactant/oil/brine systems with their chemical flood performance in short cores. The study focuses on the influence of two important system composition variables: viz. the brine salinity and the nominal equivalent weight of a petroleum sulfonate blend.Furthermore, it investigates the influence of the addition of an alkylether sulfate in terms of optimal salinities, increased salinity tolerance and tertiary recovery efficiency.

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Multiple Slug Scaling of Linear and Pattern Laboratory Chemical Floods

Cited by 3 publications

References 7 publications

Computer-Controlled Measurement of Laboratory Areal Flood Saturation Distributions

Computer-Controlled Measurement of Laboratory Areal Flood Saturation Distributions

Observation, Prediction, and Analysis of a Laboratory Two-Well Chemical Flood

A Study of the Relationship Between Surfactant/Oil/Brine System Phase Behavior and Chemical Flood Recovery in Short Cores

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