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Chemical Enhanced Oil Recovery with Special Reference to the Upper Assam Basin
| Content Provider | Scilit |
|---|---|
| Author | Hazarika, Kalpajit Gogoi, Subrata Borgohain |
| Copyright Year | 2020 |
| Description | Book Name: Advances in Petroleum Technology |
| Abstract | This chapter presents results of the laboratory investigation of alkali-surfactant-polymer (ASP) flooding technology for improving recovery of crude oil from Upper Assam oilfields. The oil displacement efficiency of the two-component ASP formula consisting of a polymer-surfactant tensiometer was modified by added alkali and was tested by conducting core flood studies. During the course of the experiments, 11 pore volume (PV) of brine and different chemical slugs was injected into the core samples. This technology has potential to become an alternative to the other chemical recovery methods, especially in cases where application of these methods is restricted by geological, economical or ecological factors. The identified combination of surfactant, alkalis and polymer was sodium dodecyl sulphate $(SDS)+Na_{2}CO_{3}$+polyacrylamide (PAM). The efficiency of these slugs will be determined with respect to the mobility ratio, (MR) stability and recovery efficiencies. From the 78overall efficiency $(E_{o}$), ASP flooding was found to be most efficient over the others. The maximum recovery of 70.6% was achieved with $SDS+Na_{2}CO_{3}$+PAM as an ASP slug. In A, S and AS flooding the overall efficiency, $E_{o}$, is the microscopic displacement efficiency $(E_{d}$), while in P, SP and ASP flooding, $E_{o}$ is the product of $E_{d}$ and macroscopic sweep efficiency, $E_{s}$. In this research the novelty lies in the fact that $E_{d}$ plays a major role in contributing to the $E_{o}$ of ASP–enhanced oil recovery (ASP-EOR) technology. The reduction in MR, and hence the increase in areal sweep efficiency $(E_{a}$) in the case of P, SP and ASP flooding may be the factor for more $E_{o}$ over the others (A, S and AS). The optimised composition of the ASP slug for the Naharkatiya (NH) crude oilfield is 0.4 vol% SDS + 0.85 wt% $Na_{2}CO_{3}$ + 1500 ppm PAM. The slug optimised for ASP-EOR was 0.4 vol% SDS + 0.85 wt% $Na_{2}CO_{3}$ + 1500 ppm PAM, which was found to be and recovered 70.6% of crude oil. |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2020-0-13339-3&isbn=9781003049937&doi=10.1201/9781003049937-4&format=pdf |
| Ending Page | 91 |
| Page Count | 15 |
| Starting Page | 77 |
| DOI | 10.1201/9781003049937-4 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2020-11-25 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Advances in Petroleum Technology Petroleum Engineering Recovery Methods Flooding Enhanced Oil Recovery Sodium Oilfield |
| Content Type | Text |
| Resource Type | Chapter |
