Working Paper Article Version 1 This version is not peer-reviewed

Research on ASP Flooding to Improve Oil Recovery in Low Permeability Reservoirs Based on Laboratory Experiments of a Partial Quality Tool

Version 1 : Received: 12 November 2019 / Approved: 13 November 2019 / Online: 13 November 2019 (03:38:54 CET)

How to cite: Huang, B.; Hu, X.; Fu, C.; Zhou, Q. Research on ASP Flooding to Improve Oil Recovery in Low Permeability Reservoirs Based on Laboratory Experiments of a Partial Quality Tool. Preprints 2019, 2019110140 Huang, B.; Hu, X.; Fu, C.; Zhou, Q. Research on ASP Flooding to Improve Oil Recovery in Low Permeability Reservoirs Based on Laboratory Experiments of a Partial Quality Tool. Preprints 2019, 2019110140

Abstract

In order to solve the problem of the poor oil displacement effect of high molecular weight alkali/surfactant/polymer (ASP) solution in low permeability reservoirs, Daqing Oilfield uses a partial quality tool to improve the oil displacement effect in low permeability reservoirs. Without changing the oil displacement capability of high molecular weight ASP solution in high permeability oil layers, the ASP solution is actively sheared in low permeability oil layers by using a partial quality tool to increase the injection capability of the solution and improve the overall oil recovery. In order to study the ability of the partial quality tool to improve the oil displacement effect, firstly, the matching degree of high molecular weight ASP solution to low permeability cores is studied, and the ability of quality control tools to change the molecular weight is studied. Then, experimental research on the pressure and oil displacement effect of high molecular weight ASP solution before and after the actions of the partial quality tool is carried out. The results show that ASP solutions with molecular weights of 1900 × 104 and 2500 × 104 have a poor oil displacement effect in low permeability reservoirs. After the action of the partial quality tool, the injection pressure is reduced by 5.22 MPa, and the oil recovery is increased by 7.79%. The injection pressure of the ASP solution after shearing by the partial quality tool is lower than that of the ASP solution with the same molecular weight and concentration without shearing, but the oil recovery is lower. On the whole, the use of the partial quality tool can obviously improve the oil displacement effect in low permeability reservoirs.

Subject Areas

ASP flooding; low permeability oil layer; partial quality tool; maximum injection pressure; oil recovery

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.