Single-Well Chemical Tracer Tests (SWTT) experience in the Mature Handil Field: Evaluating Stakes before launching an EOR Project.

Romero, Carolina; Aubertin, F.; Cassou, Emmanuel; Cheneviere, Pascal; Tang, J.S.; Odiorne, J.; Cordier, Patrick; Batias, J.

doi:10.3997/2214-4609.201404881

Cited by 8 publications

(1 citation statement)

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“…Single Well Chemical Tracer Tests (SWCT) have been widely accepted in the oil industry as a standard method for measuring ROS after water floods (Romero et al, 2009). Therefore, it was one of the methods pursued to identify if the prevalent ROS values in this carbonate field would justify further assessment and subsequent implementation of EOR strategies.…”

Section: Single Well Chemical Tracer Testsmentioning

confidence: 99%

Plans for Chemical Enhanced Oil Recovery in a North Oman Carbonate Field

Soek¹,

Jaboob²,

Singh³

et al. 2011

SPE Middle East Oil and Gas Show and Conference

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Most of PDO's carbonate fields in North Oman have been producing for many years, initially on depletion in the early days but were quickly put on water injection to maintain reservoir pressure and safeguard long term ultimate recovery. As these fields mature into early middle age, EOR options have been under review to further increase recovery.Given the reservoir properties and the prevailing fluid & gas conditions for these carbonate fields, thermal technologies are not considered an optimal choice. Gas floods would potentially feature but were screened out due to the overall balance between gas requirements, cost and potential reward. Chemical floods with potentially attractive high recoveries were selected for further assessment.The goal is to demonstrate that chemical technology can produce economic incremental oil from a waterflooded carbonate reservoir containing a low-viscous light oil. The reservoir selected has undergone a successful waterflood implementation with good control on historical voidage and production allocation. The potential follow up chemical flood is then planned to be introduced in a phased manner. This starts with phase behaviour and core flow experiments in the lab to find a suitable chemical formulation to optimally mobilize waterflood residual oil. This is then followed by field trials such as a Single Well Chemical Field Test to back up lab experiments, extensive logging, a MicroPilot test and a planned potential multi-well pilot. Full field implementation is then dependant on the results of the earlier project phases and will have to balance against the perceived rewards, risk and cost. The results to date, learning's and key findings along with the selection strategy and challenges will be discussed in this paper. This study and field work will provide a foundation upon which the future potential for chemical flooding in North Oman carbonate fields can be evaluated and implemented.

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Section: Single Well Chemical Tracer Testsmentioning

confidence: 99%

Plans for Chemical Enhanced Oil Recovery in a North Oman Carbonate Field

Soek¹,

Jaboob²,

Singh³

et al. 2011

SPE Middle East Oil and Gas Show and Conference

View full text Add to dashboard Cite

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Field Applications of Organic Oil Recovery—A New MEOR Method

Govreau¹,

Marcotte²,

Sheehy³

et al. 2013

Enhanced Oil Recovery Field Case Studies

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Numerical Interpretation of Single Well Chemical Tracer Tests for ASP Injection

Zwart

Batenburg

Stoll

et al. 2011

SPE Middle East Oil and Gas Show and Conference

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A series of single well injection tests has been conducted to estimate the efficiency of Alkaline Surfactant Polymer (ASP) flooding. These injection tests comprised a Single Well Chemical Tracer (SWCT) test that was done after water injection to establish a baseline remaining oil saturation and a second SWCT test conducted after ASP injection to measure the Remaining Oil Saturation (ROS) after ASP. Analytical methods are generally used to interpret SWCT tests and to determine the remaining oil saturation. These techniques work best when the response is close to an ideal, single peak. However, the responses from the SWCT tests in our single well tests sequences are complex, showing multiple peaks. This is indicative of complicating factors such as cross-flow between layers. To understand the complex response we used numerical simulation techniques to interpret the SWCT tests. The numerical model includes the physics of ASP, such as interfacial tension reduction, water viscosity modification, and the related reduction in ROS as wells as an accurate model for tracer dispersion. The model allows full control of physical dispersion and does not require the use of numerical diffusion to mimic the effect of physical dispersion. The numerical simulation sequence involves the full single well injection test history including SWCT tests before and after the ASP injection. The key challenge in matching the tests results with the numerical simulations was to model the complex response, which was different for each well tested. Elaborate numerical simulations, different from the conventional interpretation method, were used to successfully match all tests. This paper presents the simulation work, an explanation of the parameters varied to obtain agreement between numerically predicted and actual SWCT responses and the numerical simulation tools used to match the SWCT tests.

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Single-Well Chemical Tracer Tests (SWTT) experience in the Mature Handil Field: Evaluating Stakes before launching an EOR Project.

Cited by 8 publications

References 0 publications

Plans for Chemical Enhanced Oil Recovery in a North Oman Carbonate Field

Plans for Chemical Enhanced Oil Recovery in a North Oman Carbonate Field

Field Applications of Organic Oil Recovery—A New MEOR Method

Numerical Interpretation of Single Well Chemical Tracer Tests for ASP Injection

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