Improvement of Relative Permeability and Wetting Condition of Sandstone by Low Salinity Waterflooding

Srisuriyachai, Falan; Pancharoen, Monrawee; Laochamroonvoraponse, Rapheepan; Juckthong, Pattraporn; Kukiattikoon, Arisara; Sirirojrattana, Boonpipop

doi:10.1088/1755-1315/221/1/012044

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…The following part will focus more on the multiple ion exchange (MIE) as one of the main mechanisms of LSWF employed in this study (see Figure 4), which is highly dependent on compositions of the formation water and injected brine. For LSWF to be effective, it is necessary for the formation (connate) water to contain sodium, calcium and magnesium ( [13][14][15]21]). In an MIE process, the ions like K, Na will replace the divalent ions (e.g., Ca, Mg) that are adsorbed on the rock surfaces, leading to the liberation of oil in the form of calcium carboxylate complex (see Figure 4).…”

Section: Lswf Mechanismmentioning

confidence: 99%

Numerical Simulation of Low Salinity Water Flooding on Core Samples for an Oil Reservoir in the Nam Con Son Basin, Vietnam

Hien¹,

Giao²,

Ngoc³

et al. 2021

Energies

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Low-salinity water flooding (LSWF) is environment-friendly and operates similarly to conventional waterflooding without the need for synthetic chemical materials. The application of LSWF makes sense in Vietnam as HC production has steadily declined since 2002, and the majority of main oil fields have become near mature and mature fields. In the next years, Enhanced Oil Recovery (EOR) should be a top priority for Petro Vietnam to boost its oil production, for which the key issue is how to select a suitable EOR technology. In this study, LSWF of the Lower Miocene sand using low salinity water from Lower Oligocene sand was investigated. Previously at the Ruby field in the Cuu Long Basin, an LSWF feasibility study was carried out based on a conventional core flooding experiment, which is time-consuming and costly. This study targets the Chim Sao field in the Nam Con Son Basin, for which a cheaper and faster assessing method is required. As a result, a numerical code written in Matlab was developed and successfully validated with the core flooding experiment results obtained at the Ruby field. The LSWF simulation was conducted using the multiple ion-exchange mechanisms (MIE), and the results obtained showed an increase in the oil recovery factor by 2.19% for the Lower Miocene Sand. Another important outcome of this study is the innovative proposal and successful simulation to use the abundant low salinity water from the underlying Lower Oligocene sand as a natural LSW source to inject into the Lower Miocene oil reservoir that can be a decisive factor to help apply LSWF in practice on a wide scale not only for Chim Sao but also other similar oil fields in southern offshore Vietnam.

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Section: Lswf Mechanismmentioning

confidence: 99%